Rahul Tiwari - Evaluation of Urban Access Controlled Road...
Transcript of 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
Urban Mobility India 2010, New Delhi
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
Urban Mobility India 2010, New Delhi
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
Urban Mobility India 2010, New Delhi
(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
Urban Mobility India 2010, New Delhi
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
Urban Mobility India 2010, New Delhi
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
Urban Mobility India 2010, New Delhi
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
Urban Mobility India 2010, New Delhi
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
Urban Mobility India 2010, New Delhi
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
Urban Mobility India 2010, New Delhi
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.
Urban Mobility India 2010, New Delhi
Comparison of Scenarios
Urban Mobility India 2010, New Delhi
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
Urban Mobility India 2010, New Delhi
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
Urban Mobility India 2010, New Delhi
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
Urban Mobility India 2010, New Delhi
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
Urban Mobility India 2010, New Delhi
Thank You !!!!