Project SynopsisRoad signalling system for traffic movement management

SANJEET KUMARL&T BIS XI BatchIndian Institute of Technology, Madras

Problem Area: The Indian Scenario

• Most of the traffic signal controllers installed across the Country are first generation, fixed time controllers

• Only two cities (New Delhi and Pune) has the Area Traffic Control System (ATCS)– New Delhi - 63 Junction (imported from UK)– Pune - 38 Junctions (developed by C-DAC)

Even this is a very small percentage

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Disadvantages of Fixed time traffic signal controllers

• The timing plans are based on historical data, which may not be an accurate reflection of typical conditions

• The timing plans rapidly age and the benefits achieved decrease

• The system cannot respond to unpredictable events

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Result of fixed time controller

• Wasted Green time• Unresolved Queues• Minor Accidents at the intersection

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Types of Signal Control logic

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Challenges in implementing an Actuated traffic control on Indian roads

• Traffic is not lane following• A vehicle entering the approach (upstream) on

a particular lane need not maintain the same at the intersection

• High mix of traffic• Uncontrolled side roads and on-street parking• Obtaining a correct measure of traffic count is

highly complex • Data loss due to power failure• Network failure• Availability of funds

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Homogeneous, lane following

traffic

Typical flow on Indian Road

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Typical Indian Road Condition

• There is not, physically, as much road space and roads are not always planned and designed for efficient traffic use

• The roads are called upon to perform a wide variety of functions which includes non-traffic use – for example, the co-existence of

market stalls and through traffic on the same road space

• Segregated footpaths are often poorly provided or used for other purposes, forcing pedestrians to use the roadway

• Vehicle growth rates are very high• Vehicle mix can cover a wide range of

types and characteristics, from bicycles and bullock-carts to articulated trucks

On Street Parking

A typical parking pattern seen on Indian Roads

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Addressing the Challenges : Systems Available

• Area Traffic Control System (implemented in INDIA)– A Composite Signal Control Strategy for Indian Roads, Indian

Highways, August 2006 issue of The Indian Roads Congress, New Delhi

• Urban Traffic control System– Optimizing Networks of Traffic Signals in Real Time-The SCOOT Method,

IEEE Transactions on Vehicular Technology, Feb 1991

• Area-wide Real time traffic control System– The Area-wide Real-Time Traffic Control (ARTC) System: A New Traffic

Control Concept, IEEE Transactions on Vehicular Technology, May 1993

• Intelligent traffic Control System

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Thank You

SANJEET KUMAR