rahul tiwari - evaluation of urban access controlled road...

Evaluation of Urban Access Controlled Road Evaluation of Urban Access Controlled Road System as a Congestion Mitigation StrategySystem as a Congestion Mitigation Strategy

Rahul TiwariProf. R. SivanandanUrban Mobility India 2010, New Delhi03/12/2010

IntroductionIntroductionScope & Objectives of StudyScope & Objectives of StudyMethodologyMethodologyCase Study & Data CollectionCase Study & Data CollectionFixing the AlignmentFixing the AlignmentResults & FindingsResults & FindingsConclusionsConclusionsAcknowledgementsAcknowledgements

Urban Mobility India 2010, New Delhi

Presentation StructurePresentation Structure

Introduction Introduction


Growing traffic congestion is one of the most significant and prGrowing traffic congestion is one of the most significant and pressing essing problems in urban India. problems in urban India.

Increasing affinity to personal vehiclesIncreasing affinity to personal vehicles

Congestion affects the movement of people and the flow of goods Congestion affects the movement of people and the flow of goods to to market. market.

It affects quality of life, energy consumption and the environmeIt affects quality of life, energy consumption and the environment, nt, including air quality. including air quality.

As IndiaAs India’’s economy grows, congestion on urban roads will only worsen. s economy grows, congestion on urban roads will only worsen. A critical challenge is to use a variety of practical, relevant A critical challenge is to use a variety of practical, relevant congestion congestion mitigation options in an appropriate manner. mitigation options in an appropriate manner.

Scope and Objectives Scope and Objectives


The scope was restricted to evaluate the travel benefits of The scope was restricted to evaluate the travel benefits of the accessthe access--controlled elevated expressway system in urban controlled elevated expressway system in urban scenarioscenario

The objective was to evaluate the benefits of accessThe objective was to evaluate the benefits of access--controlled road corridors in urban scenarios in India, taking controlled road corridors in urban scenarios in India, taking Chennai as a case study through selected Measures of Chennai as a case study through selected Measures of Effectiveness (Effectiveness (MoEsMoEs) )

Methodology Methodology


(a) WITHOUT ACCESS CONTROLLED CORRIDORS

______(b) WITH ACCESS

CONTROLLED CORRIDORS (MULTIPLE SCENARIOS)

DATA COLLECTION•NETWORK DATA

LINKNODESZONES

•OD PATTERN•LINK VOLUME•LAND USE DATA

EXITING AND PROPOSED

NETWORK ON CUBE 5

•LINK VOLUMES

•TRAVELTIMES

•V/C RATIOS

ASSIGNMENT OF O-D TRIPS

THROUGHCUBE

EVALUATION OF BENEFITS OF VARIOUS SCENARIOS

LINK ATTRIBUTES:CAPACILTY

LENGTHSPEED ( FREE FLOW & CAPACITY)

NUMBER OF LANESetc.

REDUCTION IN

•SYSTEM TRAVEL TIME•VOL. CAPACITY RATIO•OD TRAVEL TIMES

Case Study and Data Collection Case Study and Data Collection


Case Study: Chennai Metropolitan Area.Case Study: Chennai Metropolitan Area.

Data CollectedData CollectedNetwork DataNetwork DataLink Attributes Data Link Attributes Data SpeedSpeed--Delay DataDelay DataMaps (Land Use)Maps (Land Use)Road Alignment DataRoad Alignment DataOO--D Trip Table DataD Trip Table Dataetc.etc.

Fixing the Alignment Fixing the Alignment


To fix the corridor alignment, following were consideredTo fix the corridor alignment, following were considered

OD DataOD Data

SpeedSpeed--Delays Survey DataDelays Survey Data

Land AvailabilityLand Availability

Land Use MapsLand Use Maps

OD Data OD Data


Major OD pairs identifiedMajor OD pairs identified

Desire Lines for major OD Desire Lines for major OD pairs.pairs.

Serve as many major OD pairs Serve as many major OD pairs as possible with the proposed as possible with the proposed alignment.alignment.

Proposed alignment validated Proposed alignment validated with Desire Lineswith Desire Lines

SpeedSpeed--Delay Survey Delay Survey


Congested corridors identifiedCongested corridors identified

City Centre highly congestedCity Centre highly congested

More than 50% roads congestedMore than 50% roads congested

0

5

10

15

20

25

30

0-15 15-20 20-25 25-30 30-40 >40

Journey speed

percentage

Source: CTTS Inception Report CMDA

Land Availability Land Availability


Open Space available Open Space available along river coursealong river course

Road along Road along AdyarAdyar and and CoovumCoovum river can river can decongest the existing decongest the existing roads.roads.

Almost no land acquisition Almost no land acquisition required with minimal required with minimal dislocation.dislocation.

River Adyar

River Coovum

Land Use Map 2026 Land Use Map 2026


Identifies areas along Anna Identifies areas along Anna SalaiSalai as major commercial as major commercial area.area.

Anna Anna SalaiSalai is existing major is existing major arterial of Chennai city. Itarterial of Chennai city. It’’s a s a 8L8L--2W2W--D road facility.D road facility.

Surveys observed high traffic Surveys observed high traffic volumes on Anna volumes on Anna SalaiSalai..

Connects City Centre to Connects City Centre to GuindyGuindy. .

Proposed Alignments for Access Controlled Roads

Five alignments were identified for the study.• i) Adyar - Kathipara Junction - Airport, along Adyar River • ii) Along Inner Ring Road (IRR) • iii) Port Trust - Maduravoyal along Coovum river • iv) Coovum creek - St. Thomas Mount (along Anna Salai)• v) Tiruvottiyur - Neelankarai (along Beach Road and ECR)

Scenarios of elevated access controlled corridor systems were generated.• Elevated road on Anna Salai only• On Anna Salai and Coovum river• On Anna Salai, Coovum river and Inner Ring Road (IRR)• On Anna Salai, Coovum river, IRR and Beach Road-ECR• On Anna Salai, ,Coovum river, IRR, Beach Road-ECR and along Adyar river

These scenarios were then evaluated using the software, considering each scenario one at a time.


Comparison of Scenarios


0

5

10

15

20

25

30

Scenario 1 Scenario 2 Scenario 3 Scenario 4 Scenario 5

% R

edu

ctio

n

Percentage Reduction in Total System Travel Times

Proposed Road Alignment Proposed Road Alignment


i) i) AdyarAdyar to to KathiparaKathipara Junction (going up to Junction (going up to Airport) along Airport) along AdyarAdyar River River = 18.2 km= 18.2 km

ii) Along IRR ii) Along IRR = 8.2 km= 8.2 km

iii) Port Trust to iii) Port Trust to MaduravoyalMaduravoyal along river along river CoovumCoovum = = 20.2 km20.2 km

iv) iv) CoovumCoovum Creek to St. Thomas Mount Creek to St. Thomas Mount (Anna (Anna SalaiSalai)) = = 17.0 km17.0 km

v) v) TiruvottiyurTiruvottiyur to to NeelankaraiNeelankarai (along Beach)(along Beach)= =

27.4 km27.4 km

Total Length Total Length = = 91 0 km91.0 km

Results and Findings Results and Findings


Improvement in V/C of existing Improvement in V/C of existing roads, new facility will witness roads, new facility will witness significant vehicular shift.significant vehicular shift.

Travel Time between major OD Travel Time between major OD pairs reduced significantly.pairs reduced significantly.

Significant reduction in percentage Significant reduction in percentage of congested roads.of congested roads.

0 20 40 60 80

Thukkanampattu, Veerar to …Kumaran Nagar to ThambaramPerambur to Theagaraya Nagar

Perambur to GuindyErnavur to Meenakshiammanpet

Grace Garden to Elephant GateVyasarpadi to Muthialpet

Muthialpet to Theagaraya NagarGrace Garden to Theagaraya Nagar

Vyasarpadi to AyanavaramMaduravoyal to Guindy

in Minutes

Travel Times Between Major OD Pair

Proposed Scenario

Existing Scenario

0 10 20 30 40

<.4.4 - .6

.6 _ .8.8 - 1.0

> 1.0

Percentage of Roads

V/C

Percentage Roads by V/C(Scenario 5)

Proposed Scenario

Existing Scenario

0

10

20

30

40

0-15 15-20 20-25 25-30 30-40 >40

Perc

enta

ge

Speed in Km/hr

Percentage Roads in Various Speed Ranges

existing scenario

proposed scenario

ConclusionsConclusions


Scenario 5 Scenario 5 -- most attractive. most attractive.

The key findings are: The key findings are:

The overall total system travel time in the network reduces The overall total system travel time in the network reduces by 26% (as compared to base scenario); by 26% (as compared to base scenario); Travel times between major OTravel times between major O--D pairs reduce; the reduction D pairs reduce; the reduction

is about 40% for OD pairs with travel times more than 60 is about 40% for OD pairs with travel times more than 60 minutes.minutes.Percentage of roads with V/C ratios greater than or equal to Percentage of roads with V/C ratios greater than or equal to

0.80 reduces from about 47% to about 29%, signifying 0.80 reduces from about 47% to about 29%, signifying significant decongestion.significant decongestion.Percentage of congested roads (speed <30 km/h) will also Percentage of congested roads (speed <30 km/h) will also

go down from about 57% to about 37%.go down from about 57% to about 37%.

Conclusions• This facility will facilitate speedier movement of buses as the existing

roads will become decongested.

• Pedestrian walkways and bicycle tracks can also be planned.

• The secondary benefits of the above proposal will be reduction in fuel consumption, pollution and accidents.

• While promoting public transportation should be the top priority, expansion of road network where it is grossly inadequate is inevitable. In particular, high class roads with capacity for moving greater volumes at higher speeds need to be thought of for major cities.

• Further feasibility analysis be taken up before considering adoption of this strategy.

• The above analysis can be performed considering future scenario

• A detailed economic analysis of implementing such infrastructure projects can also be taken up.

03/12/2010 Urban Mobility India 2010, New Delhi

Acknowledgements

• Chennai Metropolitan Development Authority (CMDA)

• Wilbur Smith Associates


Thank You !!!!

rahul tiwari - evaluation of urban access controlled road...

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