Traffic Simulation

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ANNA UNIVERSITY DIVISION OF TRANSPORTATION ENGINEERING DEPARTMENT OF CIVIL ENGINEERING CHENNAI 600 025 Project Title : TRAFFIC SIGNAL OPTIMIZATION FOR IT CORRIDOR Project Guide : Ms. G. MALARVIZHI Viva-wise PRESENTATION BY BALAKRISHNAN.L.G KARTHIKEYAN.M SANKAR.K SOORIYAKUMAR.S

description

Optimization of 4 nos of signal within 1.5 km

Transcript of Traffic Simulation

Page 1: Traffic Simulation

ANNA UNIVERSITY

DIVISION OF TRANSPORTATION ENGINEERINGDEPARTMENT OF CIVIL ENGINEERING

CHENNAI 600 025

Project Title : TRAFFIC SIGNAL OPTIMIZATION FOR IT CORRIDORProject Guide : Ms. G. MALARVIZHI

Viva-wise

PRESENTATION BY

BALAKRISHNAN.L.G

KARTHIKEYAN.MSANKAR.K

SOORIYAKUMAR.S

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NEED FOR THE STUDY

Rajiv Gandhi Salai (Old Mahabalipuram road) also known as IT

Corridor is one of the most important roads in ChennaiThis road has considered for study since heavy traffic congestion

on both the directions of the roadReason for traffic congestion in this road areuncontrolled traffic flow due to IT and other major industries are

located along the corridorImproper signal timingsignals are operated manually some of the signals are not functioningNo coordination between the signals

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Fig shows Traffic Congestion in the Project Corridor

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Traffic congestion causesIncrease in the total travel time It causes environmental degradation through air and sound pollution.reduction in the speed, Increases the accident potential, and Cost ineffectiveness of the transportation systemTo overcome the above problemTraffic signal optimization is typically needed to process traffic efficiently through a group of intersections. It attempts to reduce the number of stops and regulate the traffic,It reduces accident potentialNeed for signal optimization may be justified by high levels of vehicle emissions and poor air quality.

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OBJECTIVE OF THE STUDY

To study the present traffic flow characteristics and

physical features of the study network.

To determine the optimal signal timings by considering

prevailing traffic flow for the corridor

To improve the traffic flow using a traffic signal

optimization tool TRANSYT.

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LITERATURE REVIEW

Yun and Brain Park published a report in Stochastic Optimization

Method for Coordinated Actuated Signal Systems on Dec 2005Traffic Engineering Division Colorado Springs published a report in

Traffic Signal Coordination Planning Effort on April 2005R.Kaviarasu presented the paper in feasibility of introducing traffic

signal coordination on Indian Roads

OBSERVATION FROM REVIEW OF LITERATURE

These studies show that, Indian roads comprise of mixed traffic

which influences the effectiveness of signal coordination in urban

areas.From the past studies it is observed that the improper signal timing

was the reason for traffic issuesOptimization & Coordination of traffic signals resulted in improved

travel time, reduced accidents, improved mobility and access.

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LITERATURE REVIEW

Stochastic optimization method may be sensitive to the parameter

settings for optimization and the number of signal timings to be

optimized.

A significant demerit of the stochastic optimization method is huge

computational requirement.

TRANSYT could be used for evaluation of optimized traffic signal

timings.

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METHODOLOGY CHART

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METHODOLOGY

1. Collection of primary and secondary data for existing conditions of the study area. The data to be collected arePhysical feature of the study networkTraffic volume count study at each intersection.Pedestrian volume count.Existing Traffic Signal Phasing pattern and timings at each intersection.2. Optimize the signal timings for the existing flow conditions using Traffic Signal Optimization tool TRANSYT.3. To suggest and recommend new traffic management measures for traffic flow.

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STUDY AREA

•Rajiv Gandhi Salai (Old Mahabalipuram road) also known as IT Corridor connecting Adyar at the Northern end and Mahabalipuram at the Southern end. •It is a six lane divided road carriageway and also consists of service lanes at either side from Madhya Kailash upto Taramani•The study network is selected from Tidel Park intersection to Taramani road intersection.•It consists of four junctions namely Tidel park intersection, Ascendas intersection, LB Road intersections and Taramani road intersection. •The reason for choosing this stretch is that it has been signalized and the intersections are located within 800 meters which is the prerequisite for effective traffic signal optimization

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Fig shows the study area

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DATA COLLECTIONVolume Count Survey

Tidal Park Intersection

Peak hour traffic flow observed at this intersection -

10117 PCUs

Maximum Flow direction along Madhya Kailash to Perungudi - 2585

PCUs

Direction Wise Flow of Traffic during Peak Hour

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Photo shows conducting traffic survey

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DATA COLLECTIONVolume Count Survey

Tidal Park Intersection

Maximum % composition of Vehicles areTwo Wheelers - 50%Cars - 33%

Maximum flow observed from the hourly variation curve during 8.45 to 9.45 am

Hourly Variation of Traffic flow

% composition of vehicles

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DATA COLLECTIONVolume Count Survey

Ascendas Intersection

Peak hour traffic flow observed at this intersection - 7656

PCUs

Maximum Flow direction along Madhya Kailash to Perungudi - 2232

PCUs

Direction Wise Flow of Traffic during Peak Hour

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DATA COLLECTIONVolume Count Survey

Ascendas Intersection

Maximum % composition of Vehicles areTwo Wheelers - 48%Cars - 34%

Maximum flow observed from the hourly variation curve during 8.45 to 9.45 am

Hourly Variation of Traffic flow

% composition of vehicles

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DATA COLLECTIONVolume Count Survey

LB Road Intersection

Peak hour traffic flow observed at this intersection - 7368

PCUs

Maximum Flow direction along Thiruvanmiyur to Perungudi - 2566

PCUs

Direction Wise Flow of Traffic during Peak Hour

Thiruvanmiyur

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DATA COLLECTIONVolume Count Survey

LB Road Intersection

Maximum % composition of Vehicles areTwo Wheelers - 45%Cars - 35%

Maximum flow observed from the hourly variation curve during 8.45 to 9.45 am

Hourly Variation of Traffic flow

% composition of vehicles

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DATA COLLECTIONVolume Count Survey

Tharamani Intersection

Peak hour traffic flow observed at this intersection - 7433

PCUs

Maximum Flow direction along Madhya Kailash to Perungudi - 3232

PCUs

Direction Wise Flow of Traffic during Peak Hour

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DATA COLLECTIONVolume Count Survey

Tharamani Intersection

Maximum % composition of Vehicles areTwo Wheelers - 46%Cars - 35%

Maximum flow observed from the hourly variation curve during 8.45 to 9.45 am

Hourly Variation of Traffic flow

% composition of vehicles

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Peak Hour Flow, Timings and Distance between the Intersections

Intersection Peak Hour Peak Hour PCUs

Distance in m

Tidal Park 08:45-09:45 am

10117 0

Ascendas 08:45-09:45 am

7656 300

LB Road 08:45-09:45 am

7368 800

Tharamani 08:45-09:45 am

7433 1000

Tharamani Intersection

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DATA COLLECTION

Physical Inventory

Topo surveys have been conducted for identifying the existing

landuse and other design parameters at the junctions

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DATA COLLECTION

Existing Signal Timings

Junction Name: Tidal Park Direction Timings in sec

From To

Madhya KailsahPerungudi 64Tidal ParkThiruvanmiyur Free left

PerungudiMadhya Kailsah 44ThiruvanmiyurTidal Park Free left

ThiruvanmiyurMadhya Kailsah 34Tidal ParkPerungudi Free left

Tidal ParkThiruvanmiyur 18PerungudiMadhya Kailsah Free left

Junction Name: Asscendas Direction Timings in sec

From To

Madhya Kailsah Perungudi 42Tharamani

Perungudi Madhya Kailsah 42Tharamani Free left

Tharamani Madhya Kailsah Free leftPerungudi 20

Junction Name: Thiruvanmiyur

Direction Timings in secFrom To

Madhya Kailsah Thiruvanmiyur Free left

Perungudi Free straight

Thiruvanmiyur Perungudi Free left

Junction Name: Tharamani

Direction Timings in secFrom To

Madhya Kailsah Perungudi 38

Tharamani 34

Perungudi Madhya Kailsah 38

Tharamani Free left

Tharamani Madhya Kailsah Free left

Perungudi 34

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OPTIMIZATION OF SIGNALS

Optimization is done using Traffic optimization tool TRANSYT

In TRANSYT common data such as network cycle time, simulation time etc are to

be given as input

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OPTIMIZATION OF SIGNALS

Optimization starts with the Assigning of Node numbers for all the

intersections

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OPTIMIZATION OF SIGNALS

Link numbers are assigned based on the movement of traffic along the

nodes

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OPTIMIZATION OF SIGNALS

The program will run for offset optimization and green & offset

optimization and the corresponding signal timings obtained for both the

optimization techniques.

Network Representation of Netcon Editor in TRANSYT

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FINDINGS AND RECOMMENDATION

Findings from Field Observation The total length of the study stretch is around 1000mThe distance between intersections varies between 200m and 500mThere are four no of signal are in study stretch. Tidal Park signal and Tharamani road

signals are operated manually and Ascendas signal was not working and LB road

intersection was not provided with the signal.Maximum signal timing of 64 sec operated in Tidal Park intersection from Madhya

Kailash arm towards Perungudi. Maximum traffic is handled by the Tidal Park Intersection with 10117 PCUs.The Highest turning traffic is at Tidal Park Intersection with 48% from Perungudi arm

towards Thiruvanmiyur.The two-wheeler traffic is around 45 to 50% of the total vehicles at all the

intersections.Car traffic is around 33% at all the intersections.Auto and bus traffic constitutes around 10% and 3% respectively at all the

intersections.Jay walking of Pedestrians in the Tidal Park intersection is around 600 nos though

the foot over bridge is available near the intersection.

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FINDINGS AND RECOMMENDATION

Findings from Optimization by TRANSYT

Total Distance Travelled in Initial Settings is 7156.5 PCU-KM/H

Total Time Spent in Initial Settings is 4036.4 PCU-H/H

Time Reduced in Offset Optimization is 3656.0 PCU-H/H

Uniform Delay reduces from 436.1 PCU-H/H to 374.3 PCU-H/H

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FINDINGS AND RECOMMENDATION

Recommendation

The capacity of signalized intersections can be optimized by periodically recalibrating

the signal cycle times to cope with the traffic volumes.

A traffic database may be maintained by capturing information on the traffic along the

corridor by installing automatic traffic recorders.

Tidal Park Intersection has the total traffic flow of 10117 PCU which is greater than

10000 PCU. As per IRC 92-1985 an interchange should be provided for more than

10000 PCU in a junction.

However providing interchange may not be possible since Bukigam Canal flows

along the corridor on left side, hence Tunnel way may be provided for through traffic

from Tidal Park Intersection to Tharamani Intersection.

This may adversely reduce the traffic congestion in the study area.

 Demarcating of stretches of roads exclusively for movement by pedestrians and

cyclists and providing safe passage of pedestrian / cyclists by sub-ways.

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FINDINGS AND RECOMMENDATION

Recommendation

Providing ducts for services and utilities will reduce traffic congestion during

maintenance

Organize campaigns and special drives to educate the road users to adhere to traffic

discipline

Enforcement of laws & regulations with respect to traffic movement and violation at

signals.

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THANK YOU