jérémie wajs - systra
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LightRail201721– 22February2017
CrownePlaza,SurfersParadise
Grantingtrafficlightprioritytomaximise efficiencyofalightrail
21February 2017
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
Speaker: JérémieWajs,PhDHead,TramwaySystemsUnit,SYSTRA
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
TheSYSTRAGroup:over60yearsofpublictransportationexperience…
Page2 Grantingtrafficlightprioritytomaximiseefficiencyofalightrail
SYSTRA:world-leadingtramwayengineers£ Planned,designedandtestedover75%ofFrance
newtramwaylinesontimeandwithin budget;30otherprojectsworldwide.
£ Holdstheworldrecordfornewlightrail/tramwaylines>450km.
£ Recordnumberofprogrammanagement,planning,designandconstructionmanagementcontractsonlightrail/tramwayprojects:30lines.
£ Designedtheworld’s1stcatenary-freetramwayline.
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
Contents
Page3 Grantingtrafficlightprioritytomaximise efficiencyofalightrail
Trafficlightpriority fortramways:
1. Mainfiguresobserved without traffic lightpriority
2. Expected gainsandadvantages
3. Mainprinciples,concepts
4. Technical solutions
5. Maininterfaces
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
Why traffic lightpriority?
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
Mainfigureswithouttrafficlightpriority
£ 20to30%ofthetotaltripdurationislostatroadcrossings
25secondsonaverageforeachroadcrossingincludingtimeforacceleration/deceleration
£ Commercialspeedisintherangeof10to14kph
lowduetothefactthattramwaysarestuckingeneraltraffic£ Problemsofregularity:averageheadwaybetweentramwaypassages
isunpredictable.
Forpassengers,regularity(includingwaitingtimeinstation)ispartoftheattractivenessofthetransportmean.
Page5 Grantingtrafficlightprioritytomaximise efficiencyofalightrail
59%17%
24% Running
Exchangeofpassengersinstations
Waitingtimelostatroadcrossing
Tripduration
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
Expected gainsandadvantages:commercialspeed&fleet size
Page6 Grantingtrafficlightprioritytomaximise efficiencyofalightrail
GainsobservedinEuropewithtrafficlightpriority:£ Commercialspeedincreasedfrom14kph to17kph
19.5kph ifthetramwaysegregatedfromgeneraltraffic.
£ RollingstockfleetsizereducedforagivenPPHPD
Lowerinvestment,operation&maintenancecosts…
or£ Morecapacityforthesamefleetsize.
Betterattractivity andincreasedridership
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
Expected gainsandadvantages:passenger pointofview
Page7 Grantingtrafficlightprioritytomaximise efficiencyofalightrail
GainsobservedinEuropewithtrafficlightpriority:£ Regularityimproved,headwaymoreconstantonaverage,
traveltimemorepredictable.
£ Lesswaitingatstations,shortertripduration
£ Lessfrustrationatintersections
£ Overall,thetramwaytransportationmeansismoreattractiveforpassengers.
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
Expected gainsandadvantages:typical figures
Page8 Grantingtrafficlightprioritytomaximise efficiencyofalightrail
Foratypicaltramwayline(20km,20stations,4minheadway,3000
PPHPD,40roadcrossings,25secondslostateachroadcrossingon
average):
CriterionWithout
traffic lightpriority
With trafficlightpriority Gain
Commercialspeed 13.9kph 17.2kph +24%
Tripduration 89min 73min -18.5%
Fleet size 51 42 -17.5%
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
Expected gainsandadvantages:cost pointofview
Page9 Grantingtrafficlightprioritytomaximise efficiencyofalightrail
Financialfallbacksofpropertrafficlightpriority:£ Savingsobservedonoperationalcosts(lessdrivers).
£ Savingsobservedonrollingstockinvestments,maintenanceandrenewal(fleetsizeisreduced).
£ Revenuesareincreasedbecausethetramwaytransportationmeansismoreattractive(tripdurationisreducedandregularityisimproved).
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
Expected gainsandadvantages:Yes,but…
Page10 Grantingtrafficlightprioritytomaximise efficiencyofalightrail
…Buttrafficlightprioritycanonlydosomuch:
£ ifthetramwayisstuckintrafficclutter,performanceisreduced.
£ Propertransportplanningandtramplatformseparationwhereverpossiblearethemostefficientwaystoimproveperformance.
£ Culturalaspectsandeducationofcar(andtramway)driversshallnotbeneglected:ifdriversdonotfollowtrafficlights,efficiencyisreduced.
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
Planningtraffic intheneighborhood ofthetram
Upstream reasoning aboutneeds,city(orneighborhood)-wide traffic patternsandthefutureoftraffic inthevicinityofthetramway
Page11 Grantingtrafficlightprioritytomaximiseefficiencyofalightrail
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
Publictransportationasaparadigm andnotyet another vehicle inthestreet
£ Reasoning aboutpeopletransported vsreasoning aboutvehicles:letting onetramwaythrough atanintersectionvsletting 100carsthrough
£ Political willingness tomake roomforpublictransportation:atramis astatementaboutthefutureoftransportation
Page12 Grantingtrafficlightprioritytomaximiseefficiencyofalightrail
Inurbancontext,roadcapacityis1veh/3sec=>1560pax/track/hour
4680pax/directiononroadinfrastructure
Withheadway=4min,LRTcapacityis3150pax/hour/direction
2400pax+3150pax =5500pax/direction:+19%capacity onroadinfrastructure
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
Technical solutionsfortraffic lightpriority
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
Reaching traffic lightpriority:mainconcepts
Mainprinciplesandobjectivesforatramwaypriorityconceptare:
£ Mainguidingprincipleistooffermaximumprioritytothetramwayatintersections.
£ Waitingtimeforthetramwayshallbezerotocrosstheintersection.
£ Generaldefinition:“Maximumpriorityshallensurethegreenlightfortramwayswithouthavingtostoporreducespeed,butalsowithoutmajornegativeinfluenceonothertrafficflows”.
£ Conceptof“Greenwave”trafficlightsfortramways.
Page14 Grantingtrafficlightprioritytomaximiseefficiencyofalightrail
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
Technical solutions
Page15 Grantingtrafficlightprioritytomaximiseefficiencyofalightrail
ROADTRAFFICSUPERVISION
OCC
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
Technical solutions
Page16 Grantingtrafficlightprioritytomaximiseefficiencyofalightrail
Vehicle/groundtransmission:
Onboardtramways:Transmitterantennas
Embeddedintracks:detection loops
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
Technical solutions:howit allcomes together
Page17 Grantingtrafficlightprioritytomaximiseefficiencyofalightrail
Atramwayis detected byalongdistanceloop.Theinformationis transmitted tothetraffic lightcontroller.
SD reset
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
Technical solutions:howit allcomes together
Page18 Grantingtrafficlightprioritytomaximiseefficiencyofalightrail
Absoluteprioritytothetramisgiven.
SD reset
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
Technical solutions:howit allcomes together
Page19 Grantingtrafficlightprioritytomaximiseefficiencyofalightrail
Conflictingmovementsattheintersectionarestopped,thetramwayisauthorizedthrough.
SD reset
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
Technical solutions:howit allcomes together
Page20 Grantingtrafficlightprioritytomaximiseefficiencyofalightrail
SD reset
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
Technical solutions:howit allcomes together
Page21 Grantingtrafficlightprioritytomaximiseefficiencyofalightrail
SD resetSD reset
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
Technical solutions:howit allcomes together
Page22 Grantingtrafficlightprioritytomaximiseefficiencyofalightrail
Theintersectionisrestoredbacktogeneraltraffic.
SD reset
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
Interfaces
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
Interfaces
Page24 Grantingtrafficlightprioritytomaximiseefficiencyofalightrail
RoadTraffic
Signalling
RollingStock&AVMS
RailwaySignalling
ControlCentre
PowerSupply
RoadTrafficCentre
TrackPlatformworks
Civilworks
Numerousinterfacestobemanaged:
Integrationofroadtrafficequipmentoutsideofplatform:
signalpoles,cable ducts,manholes,controller cabinets…
Integration ofroadtraffic equipment within platform:
signalpoles,cable ducts,manholes,loops…
Status ofeach signal
group,macro-regulation…Powertoeach roadtraffic
controller…
Working status ofeach intersection
(formaintenancepurposes)…
Coordinationwith railway signalling
areasinthevicinity ofanintersection…
Integration ofon-board priority equipment,departure
from station,vehicle locationandservicetype…
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
Conclusions
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
LightRail201721– 22February2017
CrownePlaza,SurfersParadise
Conclusions
£ Roadtraffic priority fortramwaysenhances their commercialspeedandreduces thenecessary fleet size.
Better attractivity forcustomers andbetter revenuefrom service,lower investment andO&Mcosts.
£ Tramsenhancecapacityofinfrastructuregiventhatonechangesparadigm:numberofpeoplethroughanintersectioninsteadofnumberofvehicles.
Apoliticalwillandstatement!
£ Proper redesigning oftraffic patternsinthevicinity ofthetramwayallows better efficiency.
£ Numerous interfacestobe taken into account toensure effectivepriority andsuccess ofthetransportationproject.
Page26 Grantingtrafficlightprioritytomaximiseefficiencyofalightrail
LightRail2017
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LightRail2017
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