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    PAPERREF#8005

    Proceedings:EighthInternationalSpaceSyntaxSymposium

    EditedbyM.Greene,J.ReyesandA.Castro.SantiagodeChile:PUC,2012.

    8005:1

    DEGREESOFSUSTAINABLELOCATIONOFRAILWAY

    STATIONS:IntegratingSpaceSyntaxandnodeplacevalue

    modelonrailwaystationsintheprovinceofNorth

    Hollandsstrategic

    plan

    for

    2010

    2040

    AUTHOR: AkkeliesvanNES

    DepartmentofUrbanism,FacultyofArchitecture,DelftUniversityofTechnology,Netherlands

    email:[email protected]

    EgbertSTOLK

    DepartmentofUrbanism,FacultyofArchitecture,DelftUniversityofTechnology,Netherlands

    email:[email protected]

    KEYWORDS: RailwayStation,Accessibility,NodePlaceValueModel,Sustainability

    THEME: MethodologicalDevelopmentandModeling

    Abstract

    Mobilityonrailsisacknowledgedtobeoneofthemostsustainablemeansoftransportationbetweencities

    and towns.Therefore,a railway stations location inabuiltenvironmentand itsdegreeofaccessibility is

    essentialtoreachasmanytravellersaspossible.Eventhoughthereexistseveralwritingsonnetworkcities

    andTODprinciplesconcerningrailaccessibilitytourbancentresandsubsentres,thespatialconfigurationof

    the local streetand roadnetwork ina railway stations vicinity is seldom taken into consideration in the

    discussionon

    railway

    transport.

    Therefore,

    two

    different

    analyses

    methods

    were

    used

    with

    purpose

    to

    identify the degree of regional and local interaccessibility of all train stations in theprovince of North

    Holland in the Netherlands. The space syntax method provided measurements on a street nets inter

    accessibilityondifferentscalelevels,whiletheNodePlacemodelanalysesprovidedthedegreeofastations

    attractiveness intermsofplacevalueandmeansoftransportationvalue.Astheresultsshow,correlations

    werefoundbetweenastationsdegreeof localandregionalaccessibilityandfrequencyofthetimetables.

    When implementing and improving sustainablemeans ofpublic transportation, urbanfunctions such as

    dwellings,shops,services,workshopsandofficeshavetobeinshortwalkingdistancesfromstationsandthe

    streetnetworkmustbeeasilyunderstandableforwayfinding.Theresultsfromthis inquirywereapplied in

    theprovincespolicyplanasaprioritylistforstationimprovementsintermsofdegreeoflocalaccessibility.

    Moreover,theprioritylistoftheimplementationofnewhousingareaswasmadeonbasisonthedegreeof

    localand

    regional

    accessibility

    to

    existing

    railway

    stations.

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    1.INTRODUCTION

    Interaccessibility is acknowledged in regional planning to be an important socioeconomic indicator

    influencingseveraldecisionsconcerninglanduseandinfrastructuralplanning.Ithasbeenwelldocumented

    that car dependence gives impacts on the environment, urban social life and economic investment and

    development.Themoreprivatecardependentacityis,themoreofthewealthofitsinhabitantsisspenton

    gettingaround

    (Newman

    &

    Kenworthy

    1999).

    Conversely,

    the

    more

    acity

    spend

    on

    public

    transport,

    the

    more itsavesspaceandthemorespace isavailable intheurbanisedareastogeneratediversificationand

    intensificationwithinshortwalkingdistances for thecreativeeconomy (Hall1997and Jenks1996). Inter

    accessibilitycanbeapproachedfromseveralscale levels inbuiltenvironments,fromneighbourhood level

    uptolargeregions.Inthiscontext,interaccessibilitymeansthataplaceoranodecaneasilybereachedby

    alargevariationofmobilitymeanswithinareasonabletraveltime.

    In2008 theprovinceofNorthHolland in theNetherlandsasked two researchers fromDelftUniversityof

    Technology,FacultyofArchitecturetocarryoutspacesyntaxanalysesoftheroadandstreetnetworkinthe

    wholeprovince.Thepurposewastousetheseanalyses inthenewstrategicplanforthenext30yearsfor

    theprovince.

    TheNetherlandshas,incomparisonwithotherEuropeancountries,ahighdensityoftherailnetwork.Trains

    arerunningfrequently,andevenseveralsmallvillagesareconnectedtotherailnetwork.TheDutchcapital

    cityAmsterdamandSchipholinternationalairportarebothlocatedinprovinceofNorthHolland.Intotalthe

    provincehasanareaof2670km2,and2.613.992peopleareatpresentlivingintheprovince(Structuurvisie

    2008). The density is 979 inhabitants pr km2.Most of the urbanised areas are aroundAmsterdam and

    Haarlem,whiletheruralareasareintheprovincesnorthernparts.

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    Figure1:MapofprovinceofNorthHolland.

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    Intotalthereare57railwaystations intheprovince.Theyvary from largermetropolitanrailwaystations,

    airportstations, intermodalhubstations, small local stationswithonebuildingalong rail tracks, tojusta

    trackwitha ticketmachinealong the rails.A strategicplan for the railwaynetwork is important for the

    province. It isacknowledgedtobe thebestway forsolving the trafficcongestionsproblems intheurban

    areasinsideandaroundAmsterdam(Structuurvisie2008).Moreover,therailnetworkhastointerconnect

    theremoteareastothelargercitieswithfrequentlyrunningtrains.Inparticulartherailnetworkalsohasto

    servepeoplewhocanordonottravelbycar.

    It is often believed that a railway station attracts economic activities such as shops, retail and offices.

    However, the spatial configuration of the local street and road network in a railway stations vicinity is

    seldomtaken intoconsideration(MuldersKusumo2005).Somestationsareeasilyaccessiblebyfootorby

    publictransport,whileotherscanonlybereachedbyprivatecar.Thereforethenextquestionistofindout

    how sustainable thepublic transportnetwork is in theprovince in termsof thedegreeofaccessibilityof

    railwaystationstothebuiltenvironmentonvariousscalelevels.Firstareviewofwritingsonrailwaystations

    andbuiltenvironmentswillbegiven.The literatureaboutrailwaystationsandurbandevelopmentcanbe

    groupedintwogroups.Oneisabouttheroleoftherailwaystationitselfanditssurroundings,andtheother

    isabouttheroleofthemobilitynetworkinalargemetropolitancontext.Thediscussionisbrought in light

    withthecompactcitydebate.Thenthemethodsappliedinthecasestudieswillbedescribed.Thenthecase

    studiesarepresentedandfinallytheapplicationoftheresultsinstrategicplanningwillbediscussed.

    2.THERAILWAYSTATION,ITSVICINITYANDSUSTAINABLEDEVELOPMENT

    Railwaystationsarepointsoftransportinterchangewherethedepartureandarrivalactivitiestakeplace.In

    essence,thestation isaspacebetweenaparticularplaceandthetrains(Edwards1997,p.173).Arailway

    station isapublicplacewithapublic facade to the city,open foreveryone.Atpresent, railway stations

    perform a variety of functions. First of all, they are places where people change from trains to the

    pavement,

    to

    subways,

    buses

    or

    cars,

    to

    a

    bicycle,

    a

    taxi,

    the

    light

    rail,

    to

    other

    trains,

    or

    to

    airplanes.

    Otherwise they simply arrive at their final destination,which is in the immediate vicinity of the railway

    station. Furthermore, train stations are also shoppingmalls,meeting places and urban landmarks. The

    passengers station is the architecturalmanifestation of the railway system and its connectionwith the

    urbanfabric.Itisbothagatewaytoarailnetworkanditisathresholdforpassengersenteringacity.What

    givestherailwaystationparticularsignificanceasarchitectureandessentialelementsinthelifeandcultures

    ofcitiesispreciselythisinterfacebetweenthesetwoworlds therailwaysystemandtheurbanbackcloth

    (Edwards1997,p.xi).

    Afterhalfacenturyofagloballyhighemphasisonroadconstructionandanequallywidespreadneglectof

    railwayinfrastructures,thelasttwodecadesweremarkedbyarenaissanceoftherailway.Duetoincreased

    pollution, congestionofprivate cars in streets,ecologicalmovementsandan increasedpublic interest in

    sustainabledevelopment,publictransportbyrailhasregainedattentionthe lasttwodecades.Therailway

    system can be regarded as a solution for the transport problem of the cities. The ecological benefit of

    travellingbytrain,combinedwithtechnicalbreakthroughsconcerningnewtypesoftrains,suchasthefast

    FrenchTGVtrainsrunningat250km/h,newtypesofsuburbanlightrailsystems,andnewcombinedtypes

    ofmetrosystemshasledtoanincreasedrailinvestment.Likewise,newhighspeedraillinkshavebeenbuilt

    betweencitiessuchthatathroughoutmodernisationoftheoldrailwaystationsortheconstructionofnew

    ones became inevitable.Onewas thus heading for a functionally smooth transport system. Basically, it

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    seemsthatmodernrailwaystationsmostlyhavethesamespatialstructureasoldones.Thetexturesofthe

    material,however,areslightlydifferent(Edwards1997,p.ix).Modernrailwaystationsappeartobelighter,

    safer,andmorecommercialthanolderones.

    Interestingly enough, stations have become important economic catalysts for urban development. Their

    improvementhasleadtomassiveurbandevelopmentaroundseveralstationareas,duetothatthelocation

    ofrails

    is

    fixed

    and

    last

    along

    time.

    It

    gives

    acertainty

    for

    investment

    going

    beyond

    the

    period

    that

    investors

    needtogettheirinvestmentback(Cervero2003).

    Airportstationsand intermodalhubstations located in industrialareasarepoorlyconnected to the local

    placewheretheyare located.Larger railwaystationsareplacedwithinorclosetoacitycentre.Theyare

    localisedinitsdensenetworkofcentralfacilities.Itisevenmoreapartofcitylife,withasmoothtransition

    from thecitystreettoaseatonthetrain (Edwards1997,p.26). Insmallertownsorvillages,therailway

    stationtendtobeonebuilding locatedalongthetracks.Oftenthearchitectureofthebuildingmirrorsthe

    localbuildingstyleattheplace.Thesmallesttypeofrailwaysstationconsistsofatrack locatedalongthe

    railswithoneshelterfortherainandaticketmachine.Thesestationstendtobelocatedinthecountryside

    orinpostwarsuburbanareas.

    3.THERAILWAYSTATION,THEREGIONALSCALEANDSUSTAINABLEDEVELOPMENT

    Onapolicy level,twomajorstreamsofthoughtsare identifiedonhowtodesignplacesand infrastructure

    networks for generating sustainablemobilitymeans. The first one is the TransitOrientedDevelopment

    (TOD)inspiredbyPeterCalthorpesbookThenextAmericanmetropolis.Theemphasisisontheroleofthe

    pedestrian and the mixed usage of urban space in neighbourhood areas. Calthorpes concept of the

    pedestrianpocketaccountsfortheideaofanopportunityforwalkingdistancesforallkindsofpeopletoall

    activities fromhome.CalthorpeexplainsTODas follows:moderateandhighdensityhousing,alongwith

    publicuses,jobs,retailandservicesareconcentratedinmixedusedevelopmentsatstrategicpoints,along

    theregionaltransitsystem(Calthorpe,1993,p.41).TheTODconceptorpolicyideaisanalternativetocar

    dependentsprawledreality,mostlyaprobleminAmericanbuiltenvironments(Bertolini,2006).

    Theother streamsof thoughtsare the ideaofamobile networkedurban society (Bertolini,2006).This

    Europeanbased thoughts conceive that a built environment is multinodal with a network that has to

    accommodatetelecommunicationtechnologies,cartrafficandpublictransport.Thefocushere ismoreon

    whatagenericgodcityis,ratherthansustainableurbandevelopmentasinTOD(Bertolini,2006).Thework

    ofamongothersDupuy(2008)andKlaasen(Klaasen,Rooij&Schaick2007)belongstothisgroup.

    Accordingtotheseauthorsthenetworkconsistsofnodesandlinks.Thenetworkconceptisdefinedinthree

    layers.Theirconceptofthesocalledtopologicalcriterionreferstophysicalnetworkssuchasrail,road,and

    ICTinfrastructures

    located

    in

    space.

    Their

    concept

    of

    kinetic

    criterion

    refers

    to

    the

    movement

    and

    communicationbetweenthenodes,basicarelationshipbetweentimeandspace:speed.Theirconceptof

    adaptivecriterionconcernsthecapacityfortheevolutionofnetworksovertimeandspace(Klaasen,Rooij&

    Schaick2007). The rail and roadnetwork is considered to be the carriersofurban systems. The central

    aspectinthenetworkcityapproachisthatthereisaninterrelationshipbetweenthephysicalnetworks,the

    functionalnetwork,and theusersof thesenetworks.AsKlaasen,RooijandSchaickstates:Basicallyone

    couldsaythatitisnotlongeraboutbeingsomewherebutaboutgettingthere:designandplanningisnot

    aboutplacesbutaboutplacesinconnectingwithroutes(Klaasen,Rooij&Schaick2007,p.8).

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    InherPhDthesisKnowledgebaseddesign:Developingurban&regionaldesignintoascienceInaKlaasen

    discussestowhatextendvariousurbanmodelsencouragecollectiveorindividualactivitiesandwhichtype

    ofmodelencourageprivatecardependency.Assheclaims,thecollectivetransportcanbebestsupported

    byastarshapedorthefingermodelstructuredmainroutenet.Theorthogonalgridshapedmainroute

    networkgeneratesprivatecardependencyandademandforlargeparkingspaces(Klaasen,2004,p.136).

    Theconcepts

    used

    in

    the

    network

    city

    approach,

    as

    describe

    above,

    tend

    to

    be

    rather

    abstract.

    It

    is

    difficult

    toapplytheseconceptsintoconcreteresearchprojectsaswellasstrategicplanningandurbandesign

    projects.Afinermorphologicaldescriptionismissing.

    Inthiswayitisdifficulttomakeadetaileddescriptionofthespatialconfigurationofthevarioustypesof

    streetandroadnetworksofthenodesandthelinesconnectingthesenodes.Likewise,aspatialdescription

    onamicroscalelevelismissingonhowthevariousfunctionsarelinkedtooneanotheralongatransit

    system.Thechallengehereistolinktheunderstandingsofthenetworkcity,locationofactivitiesorurban

    functions,andrevealtheminlightofhowtheseaspectscangeneratesustainablemobilitymeans.

    During the last two decades, several authors such as Richard Rogers and Mike Jenks search for an

    understandingof

    the

    compact

    city

    model,

    which

    is

    recognised

    to

    encourage

    sustainable

    ways

    of

    living

    and

    energyuse for transportation.Generally speaking,urban sustainability is thus accounted for in termsof

    compactness.AsRogerspropose,anetworkwithcompacturbancentrescansupportpublictransportwith

    frequentservices(Rogers1999,p.53)

    Rogers approach to urban sustainability is reinterpreting and reinventing the dense city model. It is

    defined toconsistsofantizoning, increaseofenergyefficiency,consuming fewer resources,produce less

    pollution and avoiding sprawling over the countryside (Rogers 1997, p. 33). Separation of functions

    contributestothelossofstreetlife,encouragescaruseandcreatesnomansland.Asinglemindedspace

    useisdefinedintermsofurbanspacefulfillingasinglefunction.Thedesignofresidentialareassegregated

    fromworking and leisure areas exemplifies this case.According to Rogers, rigid planning standards and

    controls

    on

    zoning,

    parking

    and

    density

    contribute

    to

    encourage

    a

    development

    towards

    car

    dependency

    (Rogers1997,p.9).Theoppositelabel,i.e.openmindedspaceuseisdefinedintermsofmultifunctional

    spaceuseopenforeveryone. It ischaracteristicofthecompactcity.Anotherfeature isfineurbangrain

    whichrelatestoqualitiesofmixtureandvariety(Rogers1997,p.10).

    Likewise, the space syntax method has been used for describing the spatial properties of vital well

    functionedcities.Theconcepturbansustainabilityhasnotbeenusedexplicitly.However,theidentification

    ofthespatialparametersforgeneratinga livelywellfunctioningcitycanbefound inseveralspacesyntax

    paperspresentedat symposiums and injournals.A livelyurbanarea isdefined tohavehigh locally and

    globally integrated street network (Hillier et at 1993, 1998), high degree of connectivity of the street

    networkwithinashortmetricaldistance(Hillier1999),andtohaveactivefrontages(vanNes&Lopez2010).

    In2003

    the

    space

    syntax

    method

    was

    applied

    on

    various

    urban

    centres

    with

    purpose

    to

    identify

    the

    spatial

    parametersforgeneratingsustainablemobilitymeans.Asthiscontributionconcluded,urbancompactness

    canbestbeapproached fromaconfigurablepointofviewdue to thatcompactness isa topological term

    (Encyclopaedia1955).Thereforeurbancompactnessconsistsinahighdensityofthestreetnetworkwithina

    shortmetricaldistance (vanNes2007).As concluded in this research, it isnotenoughencouraginghigh

    densityinurbanareasbyincreasingthenumberofdwellingsandlocalesforeconomicactivitiesoringeneral

    highdensityofthebuiltmass.Itisalsothedensityofthestreetgridanditslocalandglobalpositioninthe

    wholesystemthatareat issue.Thedegreesofconnectivityofastreetanditsconfigurationalposition ina

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    city influence the relationship between inhabitants and visitors. Seemingly, urban compactness is a

    necessary condition for a sustainable urbanprocess in terms ofhighdegreeof interconnectivityof the

    streetgridandthewayitisconnectedtothewholecityonlocalandglobalscales(vanNes2007).

    InherPhDthesis,CameliaMuldersKusumoinvestigatedtowhatextendrailwaystationsattractinvestments

    andvitalshoppingareasintheirvicinity.Plannersanddesignersputalotofeffortintotransformingrailway

    stationsinto

    urban

    areas.

    However,

    the

    spatial

    structure

    of

    the

    local

    street

    the

    railway

    stations

    are

    connected to isoftennot taken into account at all. Therefore she analysed the local streetpattern and

    correlatedthedegreeofspatial integrationwiththe locationpatternofshops.Ashercasestudiesshows,

    stationsinitselfisnotenoughtoattractshopsandinvestmentinthevicinity.Alocalareasdegreeofvitality

    hastobespatiallysupportedbya localwellconnectedand integratedstreetandroadnetwork(Mulders

    Kusumo,2005).

    Sheapplied the traditionalspacesyntaxmethod,whereonly thenumberofdirectionchanges fromeach

    streettoallothersistakenintoaccount.However,duringthelastthreeyearsnewmethodologicalaswellas

    software development has taken metric and geometric distance into account. These new spatial

    measurementsandtoolsmake itpossibletoanalyse largermetropolitanareaswithmorediversityonthe

    typesof

    spatial

    analyses

    than

    in

    the

    past.

    Asindicatedfromtheliteraturereview,thespatialconditionsofasustainableurbandevelopmentseemsto

    beacompactcitywithaninteraccessiblestreetandroadnetworkthathaveaspatialstructuregenerating

    sustainablemobilitymeans.Adefinitionofinteraccessibilityinthiscontextimpliesthattherailwaystation

    isembeddedorwellconnectedto itsvicinitysstreetand roadnetworkandthat thevariousservicesare

    easilyaccessible from the railway station.Moreover, the frequenciesofpublic transport servicesand the

    mixtureofurbanfunctions(suchasdwellings,offices,shopsandleisureactivities)hastobehigh.

    4.THENODEPLACEVALUEMETHODANDTHESPACESYNTAXMETHOD

    Twomethodswereusedtoinvestigatethecorrelationbetweenastreetnetsdegreeofspatial integration

    andthevalueofarailwaystation,thespacesyntaxmethodandtheNodePlacevaluemodel.

    TheNodePlacevaluemodel,developedbyLucaBertolini,aimsatcorrelatingthedegreeoffunctionalityand

    degreeof localplacequalitiesfornodes (Bertolini1999).Accordingtothismodel,astation functionswell

    whenthenodevalueandtheplacevaluecorrespond.Theparametersfordecidingthenodevaluearethe

    variationinthemobilitytypes,thefrequencyofthepublictransportsystemofahub,theaccessibilityofthe

    network connected to thenode, and thenumberofmobilitymeans that can reach thehub.Thehigher

    variationofmobilitymeansand thehigher frequencieson the time tablesduringaday, thehighernode

    value. The parameters for the place value are dependent on the number of functions accessible in the

    vicinityof

    the

    node,

    such

    as

    dwellings,

    offices,

    public

    buildings,

    leisure

    activities

    and

    shops

    and

    the

    way

    these functionsareconnected toeachother.Thehighernumberof functionsandserviceswithinashort

    walkingdistancefromastation,thehigherplacevalue.AccordingtoBertolini,amonofunctionalnodewith

    forexampleonlyofficeshasa lowdegreeofplacevaluethananodewithdwellingsandoffices (Bertolini

    1999).

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    Figure2:Degreesofbalancebetweenanodevalueandaplacevalue(Bertolini1999)

    TheNodePlace valuemodel illustrates therefore theoptimal correlationbetweenplace value andnode

    value.When there is abalancebetween this correlation it isdefined tobe a successfulnode andplace

    (figure2).Oftenrailwaystationslocatedinthesekindsofplacestendtobesuccessful.Assoonaseitherthe

    placevalueorthenodevalue isdominating,theseplacesaredefinednottobesuccessful fornodes.The

    modelhasbeentestedonstationareas in theprovinceofNorthHollandbyGertonPieters (figure3).He

    usedthefollowingfourcategoriesfortheclassificationoftheplaceandnodevalueofarailwaystation:(1)

    largeurbancentrenode,(2)transfernode,(3)regionalnode,and(4)localnode.Thenextstepistocompare

    theseresultswithspacesyntaxanalysesoftheroadandstreetnetworkofthewholeprovince.

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    Figure3:GertonPietersanalysisofstationsinProvinceofNorthHolland(Source:NorthHolland2009)

    Theaimwithusingthespacesyntaxmethodistogetinsightsonhowthespatialstructureofthestreetand

    roadnetworkinastationsvicinityrelatestothestationsplaceandnodevalue.Thespacesyntaxmethodis

    abletocalculatehowastreetrelatestoallothers inatownorcity.TherecentversionsoftheDepthmap

    softwareareabletocalculatetopologicaldistance(howintegratedastreetisinrelationshiptoallothersin

    termsof

    the

    number

    of

    direction

    change),

    geometrical

    distance

    (how

    integrated

    astreet

    is

    in

    relationship

    to

    allothersintermsoftheangularrelationshipbetweenthem),andmetricaldistance(Hillieretal2007).

    Whenanalysinglargesettlements,recentsoftwaredevelopmenthavemadeitpossibletoanalysehoweach

    streetrelatestoallothers insettlementswithmorethanhundredthousandstreetsegments.Asresearch

    has shown, there are correlations between a built environments spatial layout of its street and road

    networkandthelocationofeconomicactivities,crimedispersal,landusealongstreets,andpropertyvalues

    (Hillieretal1998).Thereforethedegreeofspatialintegrationaffectsmobilityflowrates.Moreover,italso

    affectsthe locationofvariouseconomicactivitiessuchas firmsandshops (Hillieretal1993,1998). Ifthe

    structureofthestreetandroadnetworkchanges,themobility flowandthe locationpatternofeconomic

    activitiesareaffected(vanNes2002). Inthisrespect,astationoranodesplacevaluecanbequantitative

    measuredonthevariousdegreesofspatial integrationofthestreetandroadnet.Thespatialparameters

    canbecorrelatedwiththesocialandtechnicalparametersindicatedintheNodePlacevaluemodel.

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    Figure4:GlobalaxialintegrationanalysisofthestreetandroadnetworkinNorthHolland.

    5.ANEWTYPOLOGYOFRAILWAYSTATIONSINTHEPROVINCEOFNORTHHOLLAND

    Figure4showsaglobalaxial integrationanalysisoftheroadandstreetnetwork inthewholeprovinceof

    NorthHolland.Theredandorangelinesrepresentthespatialmostintegratedareasintermsofthefewest

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    numberofturns.Themorebluethelinesget,themorespatialsegregatedthestreetsare.Inordertoreduce

    the edge effect of the global axial analyses,we added the Rijland region to the axialmap. This region

    belongstoanotherprovince(ProvinceSouthHolland).However,dueto itsstrongconnectionstoSchiphol

    AirportandAmsterdam,itisadded.

    Ascanbeseenonthemap,theareasaroundAmsterdamsringroadarethemost integratedareas inthe

    province.There

    most

    of

    the

    international

    companies

    and

    advanced

    producer

    services

    (APS)

    are

    located.

    The

    northernareasarethemostsegregatedones,coloured inblue.Theseareasaredominatedbyagricultural

    production,consistofsomesmallvillagesandhaveaslightstagnationinthepopulationgrowth.Withother

    words,theglobal integrationmapshowsthetomovementpotentialsonaprovincialscale level.Hence,

    thespatialpotentialsforthelocationoflargebusinesscentres,largescaleindustrialactivities,megamallsor

    carbasedshoppingcentresareindicated.

    Onalocalscalelevel,figure5showsalocalangularintegrationanalysisofthewholeprovince.Theangular

    analysis is segmentbased and the local radius is three timesdirection changes. The various localurban

    centres are highlighted in red and yellow, in particular the main streets andmain routes through and

    betweenurban areas. Therefore themap shows the throughmovementpotentialson a local scale. It

    showsthe

    spatial

    potentialities

    for

    the

    local

    urban

    centres.

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    Figure5:Localangularsegmentanalysiswithatopologicalradius3ofthestreetandroadnetworkintheprovinceofNorthHolland

    Whenapplyingvariousmetricalradiusesontheangularchoice integrationvalues,thedegreeofvitalityof

    variousnodesorcentresishighlightedonvariousscalelevels.Anangularchoiceanalysiswithalowmetrical

    radiushighlightstheoldhistoriccentres. Inthepastthesecentreswereplannedtobe interaccessiblefor

    pedestrianmovement.A highmetrical radius highlights themodernurban centres and themain routes

    network.Figure6showsanangularchoice integrationanalysiswithametricalradiusof800units.Ascan

    bee seen in the figure, themain streets in the historical core ofAmsterdam,Haarlem andAlkmaar are

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    highlighted inredcolours.Likewise,allthesmalltownandvillagecentresarehighlighted in lightblueand

    yellowcolours.Thesestreetsarefrequentedbypedestriansandhavetheliveliestshoppingstreets.

    Figure6:Angularchoiceanalysis(segment)witharadiusof800metricalunitsofthestreetandroadnetworkinNorthHolland

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    Figure7showstheangularchoiceintegrationanalysisoftheprovincewithametricalradiusof9000units.

    Theregionalmaincentresarehighlighted.InAmsterdamthesestreetsareaccessiblebytram,bussesaswell

    asprivatecars.Oftenthemainrailwaystationsare inthevicinityofthesecentres.Ascanbeseenonthe

    map,themaincentresareAmsterdam,followedbyHaarlemandAlkmaar.

    The locationofall railway stationsaccording to the typologypresentedbyGertonPieters (NorthHolland

    2009)can

    now

    be

    correlated

    with

    the

    results

    from

    the

    spatial

    analyses.

    The

    degree

    of

    potentialities

    and

    obstacles fordevelopmentaround stationareascanbe revealed.These results canbeuseful formaking

    prioritiesofthedevelopmentofstationareas. Inparticularthecombinationofthesetwomethodsshows

    the degree of accessibility and vitality on various scale levels. But first the identification of the spatial

    parametersofwhatasustainabletrainstationiswillbediscussedforeachtypeofrailwaystation.

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    Figure7:Angularchoiceanalysis(segment)witharadiusof9000metricalunitsofthestreetandroadnetworkinNorthHolland.

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    Figure8:Thedegreeofaccessibilityonvariousscalelevelsatonerailwaystation.

    Intermsofthedegreeofaccessibilityofanode(anodesspatialprofile),fivetypesofrailwaystationsare

    indicatedbasedonthespacesyntaxanalysesandthenodeplacevalueclassification;(1)Wellconnectedon

    all scale levels, (2)Regionalwellconnected, locally isolated (3)Wellconnectedon town level,butpoorly

    accessible for pedestrians, (4) Locally wellconnected, poorly connected on regional level, (5) Poorly

    connectedonall scale levels.Themethod for theclassification isbasedon the spacesyntaxanalyses for

    eachstation,asshowninfigure8.

    Asitturnsout,astationsdegreeofnodeandplacevaluedependsonthespatialconfigurationofthestreet

    androadnetinitsvicinity.Thestationsdefinedasbeingalargeurbancentrenodewithbothhighnodeand

    place valueshave a street and roadnetworkwellintegratedonall scale levels. Stationswithhighplace

    value, but low node value tend to have a street network that are highly locally integrated but poorly

    integratedon regional level.Conversely, stationswithahighnodevalue,but lowplacevalue tend tobe

    located inmonofunctionalareaswitharegional integratedstreetandroadnetwork.The local integration

    onthestreetandroadnetwork is low.Stationswithbotha lownodeandplacevaluetendtohavebotha

    lowintegrationonitssurroundedstreetandroadnetworkonlocalaswellasregionallevel.

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    Figure9:Thelocationofvarioustypesofrailwaystations.

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    Figure9showsthe locationofthetypologiesofallrailwaystations inprovinceofNorthHolland.Thewell

    connectedrailwaystationsonallscale levels(type1)arethecentralstationsofAmsterdam,Haarlemand

    Alkmaar.Thesestationsareeasilyaccessibleonaprovinciallevelaswellasforpedestriansfrequentingthe

    stationsvicinityinsideoradjacenttothecityandtowncentres.

    Thereisabalancebetweentheplaceandthenodevalueinthevicinityofatype1railwaystation.According

    tothe

    Node

    Place

    value

    model,

    there

    tend

    to

    be

    high

    pressure

    on

    the

    land

    in

    the

    vicinity

    of

    these

    kinds

    of

    stations. Therefore, the location of a main railway station contributes to sustainable means of

    transportation inthesekindsofareas.Thesestationsareasplacevalue isveryhighduetoa largemixof

    functionssuchasoffices,shops,services,dwellings,cafsandrestaurants inthevicinityofthesekindsof

    railwaystations.Likewise,thedensityofthebuiltmassishighintermsofagoodbalancebetweenhighfloor

    space index(FSI)andgroundspace index (GSI) (HauptandBerghauserPont,2010).Thesestationshavea

    highnodevalueduetoahighfrequencyofalltypesoftrains(intercityandlocaltrains)andbussesortrams

    departingfromthem.Sincethesestationsarewellconnectedtotheregionalaswellasthe localnetwork

    andhaveahighvariationof sustainablemobilitymeans (train, trams,busses,bicycleetc), these stations

    havethemostsustainablelocation.Oftenstreetsintheirvicinityaredifficulttoaccessbytheprivatecardue

    totrafficregulations,inwhichforcepeopletousethepublictransportorthebicycle.

    The regional wellconnected stations with poor pedestrian accessibility in the vicinity (type 2) are the

    Schipholairporttrainstation,andstationsinindustrialareas.ExamplesontheseareHoofddorp,Sloterdijk,

    AlkmaarNoordandDiemen.Thevicinityofthesestations isnotpedestrianfriendlyandthesestationsare

    mostly transferstations.Oftenofficeswithgoodparking facilitiescanbe found in thesestationsvicinity.

    TheseareastendtohavelowGSIbutsometimesahighFSIontheirbuiltmass.Thesestationstendtobeon

    anunbalancednode.Theplacevalue is lowbecausethenode ismonofunctional. Intermsofnodevalue,

    the frequencyof trainsdeparting from these stations tend tobe relativelyhigh. Some stationsarewell

    connectedtothelocalbusnet.

    The trainstationsaccessibleonacityor townscale level,butwith lowdegreeofpedestrianaccessibility

    (type3)

    are

    the

    train

    stations

    located

    on

    the

    edges

    of

    settlements.

    In

    particular

    railway

    stations

    in

    the

    vicinityoflargethroughoutplanneddwellingareasfromthe60s,70sand80swithahighdegreeofprivate

    car dependency belong to this type. Examples on railway stations of this kind areAmsterdam Lelylaan,

    Beverwijk, Nieuw Vennep and Castricum. Often local centres can be found on only one side of these

    stations,ortheydonothaveanycentresatall.TheseareastendtohavealowGSIandmediumtohighFSI

    ontheirbuiltmass.Alargepartofthesestationsareaslandsurfaceisdominatedbyroadsandparkinglots.

    Duetothatthereisamixoffunctionsinthestationsvicinity,theplacevalueishigh,butthenodevalueis

    lowduetothatonlylocaltrainsdepartfromthesestations.Thereforethenodeplacevalue isunbalanced.

    The challenge here is to encourage an urban development with a locally integrated street network

    generatinganaturemixoffunctions.

    Thelocally

    well

    connected,

    but

    poorly

    connected

    on

    regional

    level

    railway

    stations

    (type

    4)

    are

    often

    located

    in the town centres in the provinces edges. Examples on this are the railway stations in Den Helder,

    Hilversum and Enkhuizen. These towns have a small historic centrewhere the railway station is easily

    accessiblebyfoot.Localvitalshoppingstreetsandprovisionofservicesare inshortwalkingdistancefrom

    thesestations.Thedensityof thebuiltmass ismediumtohigh in termsofagoodbalancebetweenhigh

    floorspace index(FSI)andgroundspace index(GSI).Likewise,thesestationareashaveagoodbalanceon

    theirplaceandnode value in termsofabalancedmixof functionsand thatboth local trains and some

    intercitytrainsdepartsfromthesestations.Someofthemareinterchangepointstoalocalbusnet.

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    Finally,therailwaystationswithpoorconnectionstothestreetnetworkonallscalelevels(type5)tendto

    havearemotelocation.Thesestationscanonlybereachedbycarandthestreetandroadnetworkintheir

    directvicinitydonotgeneratepedestrianmovement.ExamplesonthesekindsofstationsareDenHelder

    Zuid,WeespandNaardenBussum.Therearenoservices in thevicinityandtheseareashave lowFSIand

    GSI. The node value is low due to that these areas are either dwelling areas or local industrial areas.

    Likewise,theplacevalueislowintermsoflowfrequenciesoflocaltrainsdepartingfromthesestations.

    Astheanalysesshows,Amsterdamisthemostvitalcentreintheprovinceonallscalelevels.However,the

    centreofHaarlemhasaveryhighlocalintegrationcombinedwitharelativehighregionalintegration.Itcan

    bemirroredinthevariationofshopsinthesecentres.InHaarlemcentrethereisamuchlargervariationin

    typesofshopswithinashortmetricaldistancethan inAmsterdamcentre. InAmsterdamthechoicesand

    variationsofshopsarelargerthaninHaarlem,buttheyarespreadoveralargemetricalradius.Conversely,

    theprovincesareasinthenorthhavelowlocalandregional integration.Theseareasarepoorlyaccessible

    byrailandpublictransport.Someofthelocalcentresinthevillageshavehighlocalintegrationonthestreet

    networkandareknowntobepedestrianfriendlyareas.

    Whatare then the spatialconditions fora sustainable locationofa railway station?Firstofall,a railway

    stationlocated

    directly

    to

    acity

    centre

    or

    town

    centre

    that

    have

    ahighly

    integrated

    road

    and

    street

    network

    on various scale levels has themost sustainable ones. As regards the theory of the naturalmovement

    economic process, streetwith high spatial integration on various scale levels tend to have high human

    movementflowratesaswellashighconcentrationofservices(Hillieretal1993,1998).Moreover,streets

    withbothgloballyand locallyhighangularchoice integrationvalueswithin shortmetricaldistanceshave

    highvariationoffunctionsandhighdensityofthebuiltmass(vanNes,BerghauserPont,Mashhoodi2011).

    Sincethesekindsofurbanareasattracthumanmovementtowardsthem,arailwaystationeasilyaccessible

    tothemcanstimulatetransportonrailratherthanprivatecaruse.Whencomparingtheresults fromthe

    spacesyntaxanalyseswiththenodeplacevalueanalysis,stationswithahighlocalintegrationonthestreet

    grid in their vicinity tend tohaveagoodbalancebetween theplaceandnode value.There isabalance

    between the timetables, frequencies,degreeofmultifunctionality in landuse,andservicesand facilities

    provided.The

    higher

    global

    integration

    values,

    combined

    with

    high

    local

    integration

    values,

    the

    more

    pressure there ison thearea. In thesecases, theneedofa railway stationwithhigh frequencieson the

    timetablescancontributetosustainablemeansofmobilitytoplaceswithahighaccessibilitydemand.

    6. THE APPLICATION OF THE RESEARCH RESULTS IN THE STRATEGIC PLAN OF PROVINCE OF NORTH

    HOLLAND

    The classification of the various railway stations based on their location in the province is usefulwhen

    makingapriority listofsustainabledevelopmentofnewhousingareas.Intheprovincesstrategicplanfor

    thenext30yearssomeareasareproposedforfacilitatingfutureurbanexpansionmostlyontheprovision

    of new dwellings. The province hasmade amap of potential future location of new dwelling areas for

    facilitating living in thecountrysideor in thenatureareas.According to the recentnationalspatialpolicy

    document(MinisteriesvanVROM2006),thereisademandforthisdwellingtype.Therefore,incomparison

    withearliernationalpolicydocuments,thegovernmentandtheprovincesaimatchoosinglandfacilitatinga

    developmentofthiskind.However,newhousingareasofthiskindtendtogenerateprivatecardependency

    and to contribute to urban sprawl into the countryside. It is therefore worth revealing the degree of

    sustainabilityof theprovincesproposedhousingareas in termsofmobilitymeans.Theaim is tomakea

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    classificationandaprioritylistoftheseproposedhousingareasbasedontherailwaystationanalyseswith

    thespacesyntaxmethodandthePlaceNodeValuemodel.

    Theseproposednewdwellingareaswerecorrelatedwiththe fourspacesyntaxmapsandcombinedwith

    theabovepresentedvarioustypesofrailwaystations.Theaimwastoinvestigatewhatkindoflocal,regional

    and provincial accessibility these proposed new dwelling areas have. In particular the degree of spatial

    integrationand

    hence

    the

    degree

    of

    vitality

    of

    the

    existing

    local

    centres

    street

    network

    were

    taken

    into

    account. Inthisway,thesedwellingareaswereclassifiedaccordingtohowtheycontributetosustainable

    meansofmobility,thetypeofeventualarailwaystationinthevicinity,andtowhatextendtheseproposed

    newareasgenerateurbansprawl into thecountryside.Thedwellingareaswereclassified in sixdifferent

    groupsaccordingtotheirlocationintermsofgeneratingsustainablemeansofmobilityanddegreeofvitality

    oftheexistingstreetandroadnetworkinthedirectvicinity.Figure10showsthelocationsoftheproposed

    newdwellingareaswiththeirclassificationletters.

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    Figure10:Thelocationoftheprovincesproposalofnewdwellingareas.

    TypeAispoorlyconnectedtotheexistingurbanareas,hasnorailwaystationandispoorlyaccessibletothe

    highway net. Implementing dwellings in these areas contribute to sprawl into the countryside and high

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    degreeofprivate cardependency,whichconflictswith theKyotoagreement.Theareasbelongingunder

    typeAarelocatedattheedgesoftheprovince,withnoconnectionstoexistingtownsorvillages.

    TypeBareasarecloselylocatedtotheexistingsmallvillages.Thelocalaccessibilityishighandcanstimulate

    movementby footorbike for the localmovement.The regionalaccessibility ison theotherhand low in

    termsof lowdegreeofspatial integrationof thestreetand roadnetworkanda lackofa railwaystation.

    Proposeddwelling

    areas

    of

    this

    kind

    can

    be

    supportive

    to

    the

    existing

    small

    village

    centres.

    It

    all

    depends

    howthedegreeofspatialintegrationofthelocalstreetnetworkwillbeonalocalscaleinthesenewareas.

    TypeCareasarefillinnareasbetweentheexistingurbanisationpatterns.Theseareashaveahighdegree

    ofregionalaswellaslocalaccessibilityoftheexistingstreetandroadnet.Theseareasaredefinedtobethe

    most sustainable proposals for urban expansion, since the existing road, street and rail infrastructure is

    presentinthedirectvicinity.Inadditionthesekindsofdwellingareasgivesextrasupportforthesurvivalof

    existingadjacentlocalurbancentresandtogetahighamountofpeopleusingtheexistingrailnetwork.

    The type D areas are located along the highly integrated regional road and rail network. They are not

    connectedtoanyexistingvillages,townsorcitycentres.Thechallengeinthedevelopmentoftheseareasis

    toprovide

    them

    with

    anew

    well

    connected

    local

    street

    network

    with

    high

    degree

    of

    spatial

    integration

    withinashortmetricaldistanceforgeneratingamixoffunctions.Thebestsolutionistomakeanewtown

    withalocallyintegratedstreetnetworkintheseproposedareas.

    ThetypeEareasarelocatedadjacenttolargertownsandcitiesandarewellconnectedtotheregionalrail

    androadnetwork.Inordertoavoidspatiallysegregatedsleepingsuburbs, itis importantthattheseareas

    localstreetnetworkiswellconnectedtothemainroutesthroughandbetweenurbanareas.Inaddition,the

    newlocalcentreswiththenecessaryfacilitiesneedstobeonthesemainroutes.Inthiswaytheseareascan

    benefitfromthepotentialextensionoftheexistingtramandrailnetwork.

    ThetypeFareasarethespecificcasesnotbelongingtoanyoftheseotherabovementionedtypes.These

    areas have to be treated individually, depending on their specific local context of the street and road

    networkandthedegreeofadjacencyofarailwaystation.

    Ascanbeconcluded,theproposed locations fornewhousingareasbelongingundertypeCgenerate the

    mostsustainablemeansofmobility.Thereforeurbanexpansionshouldtakeplacefirstintheseareas.These

    areas have the potentials for becoming vital local communities and to generate an optimal use of the

    existingmobility infrastructure and localurbanpedestrian friendly shopping areas. These areashashigh

    localaswellasregionalspatialintegration,theyareadjacenttoexistingcentres,andgeneratespedestrian

    activitiesandusagesofpublictransport.TypeDexpansions isonthesecondplace,typeE isonthethird

    place,andtypeBisontheforthplace.TypeAexpansionsshouldbeavoided,sinceitgeneratesurbansprawl

    andprivatecardependency.

    7.THESPATIALPARAMETERSFORGENERATINGSUSTAINABLEMOBILITYMEANS

    Attheresultsfromthisinquiryshow,thespatialconfigurationofthelocalstreetandroadnetworkmatters

    forthedegreeofsustainablemobilitymeansaroundstationsareas.Highangularchoice integrationvalues

    withbothahighandlowmetricalradiigeneratemultifunctionalurbanareaswithhighvariationofmobility

    means(walking,bicycling,tram,bus,lightrail,trainetc)andhighfrequenciesontimetables.

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    Itiswellknownthatsuccessfulrailwaystationswithhighfrequenciesofservicesandtimetableshavehigh

    numberofpeople(inhabitants,commutersandvisitors)usingit.Itisdependentonhighnumberofservices,

    functions(suchasjobs,shops,amenities,dwellings,andoffices)initsvicinity,highdensityofthebuiltmass

    (FSIandGSI),andhigh variationof stepoverpossibilities toothermobilitymeans (bicycle, tram,metro,

    lightrail,bus,walking, taxiand car)withina shortmetricaldistance.However,diversityand frequencies

    seemstodependonthespatialconfigurationofthestreetandroadnetworkinastationsvicinity.

    Mainrailwaystations in largetownsandcitieshavehigh localandaswellasregionalinteraccessibilityon

    thespatialconfigurationofthestreetandroadnetwork,whilerailwaystationsinsmallertownsandvillages

    havemostlyhighdegreeof localaccessibility.Thesetwostationtypeshave incommontohave livelyand

    vitalstreetsintheirvicinity.Thereisabalancebetweentonodeandtheplacevalue.Seemingly,thedegree

    ofbalancebetweenplaceandnodevalueisdependentonthespatialconfigurationofthestreetnetworkin

    termsofhighlocalangularchoiceintegrationwithinashortaswellaslargemetricaldistance.

    Stations with high regional accessibility and low local accessibility are transfer stations such as airport

    stationsorindustrialareaswheretwoormoremajorrailwaylinesareintersection.Inthesestationsvicinity,

    the street networks spatial structure is only suitable for vehicle transport and these areas are not

    pedestrianfriendly.

    They

    are

    unbalanced

    nodes.

    Train

    stations

    with

    both

    alow

    regional

    and

    local

    integration

    valueson the street and roadnetwork in their vicinity are located in remote areaswithhighdegreeof

    privatecardependency.Thesestationshavealowfrequencyoftraindepartures,littlevariationinmobility

    means,andtheirsurroundingsaremonofunctional.Theyareunbalancedplaces.

    Correlationswerealsofoundbetweenthefrequencyofthetimetablesandastationsdegreeofaccessibility

    to itsvicinity.Themoreregionalaswellas localastationisspatiallyconnectedto its localstreetandroad

    network, the higher frequencies of the timetables. Accessibility to potential train travellers is therefore

    essentialforgettingthecriticalnumberofpopulationforusingtherailnetwork.

    Thevarioustypesofstationareasanddwellingareasrequiredifferentstrategiesforgeneratingsustainable

    means

    of

    mobility

    in

    the

    planning

    and

    urban

    design

    practice.

    For

    example

    a

    station

    and

    a

    proposed

    housing

    areawitha strong regionalaccessibilitycanbe sustainableona localscale level through implementinga

    wellconnected and integrated local street net. However, not every type of station area and proposed

    housingareacanbeimprovedupon.Atleast,fromasustainabilityperspective,thetwomethodsappliedin

    this inquirycontributetomakeapriority listofurbantasks intheprovincialplans.Likewise,thisapproach

    shedssome lightonrealisticandeffective investmentstrategies. Itshowsthespatialpotentialsaswellas

    constraintsinthevariousstationsvicinities.

    Railwaystationsseemtobeadirectproductofthetransportationmodesofthesociety.Newtechnology

    relating to new kinds of trains or to public transportation in generalmight come about in due course.

    Developmentsofthissortwillprobablysetnewclaimsonrailwaystations.Butuntilnow,asustainablewell

    functioningstationgeneratingsustainablemeansofmobility,dependsonbeingwellconnectedtothestreet

    networkinitsdirectvicinity.Itencouragesalargeamountofpeopletouserailtransportinsteadofprivate

    caruse.Suchbasicqualitiesdonotonlydependon thenumberof shops, tracks, railwaycompanies, the

    density of the builtmass, and on the size of the piece of architecture inwhich they figure. The spatial

    structureofthestreetandroadnetworkonvariousscalelevelsinthevicinityplaysalsoasignificantrolein

    generatingsustainablemeansofmobility.

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