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Motorways and Urban Mobility - International Road Federation

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INTELLIGENT TRANSPORT SYSTEMS<br />

INTELLIGENT TRANSPORT SYSTEMS<br />

Video Incident Detection for<br />

Advanced Traffic Management<br />

Systems under Indian Traffic<br />

Conditions<br />

Dr Kayitha Ravinder, Dr S. Velmurugan &<br />

Dr S. Gangopadhyay<br />

Central <strong>Road</strong> Research Institute,<br />

New Delhi, India<br />

Introduction<br />

The New Delhi based Central <strong>Road</strong> Research Institute (CRRI)<br />

has successfully demonstrated two ITS pilot projects forming<br />

part of an Advanced Traffic Management System, namely<br />

a Video Incident Detection System (VIDS) <strong>and</strong> an Advanced<br />

Parking Management System (APMS). This study focuses<br />

on the efficacy of VIDS for advanced traffic management<br />

under Indian conditions in locations where lane discipline is<br />

seldom adhered to. The principal objective of the study is to<br />

apply video image processing for incident detection (using<br />

Citilog software) on a typical urban section of the country’s<br />

NH-2 Highway to assess effectiveness of incident detection<br />

<strong>and</strong> accuracy in evaluating traffic flow parameters. The<br />

study further elaborates on the various VIDS parameters as<br />

well as the reliability <strong>and</strong> adaptability of the system.<br />

VIDS parameters<br />

The Video Incident Detection System (VIDS) parameters can<br />

be adjusted, <strong>and</strong> it is always possible to revert to the default<br />

settings. This flexibility is important as the settings directly<br />

affect the processing <strong>and</strong> image analysis programme<br />

for the lane in question. Any incorrect adjustments can<br />

generate problems such as false alarms, or cause incidents<br />

to go undetected. The following is the list of parameters<br />

for VIDS l:<br />

- Traffic slow-down alarm<br />

- Slow vehicle alarm<br />

- Wrong way alarm<br />

- Stop in fluid traffic alarm<br />

- Stop in congested traffic alarm<br />

- Speeding alarm<br />

The abovementioned operations are shown in Figures 1<br />

<strong>and</strong> 2.<br />

Figure 1: Lane configuration of the Video<br />

Incident Detection System<br />

Figure 2: Operation of four cameras, comprising<br />

two PTZ <strong>and</strong> two fixed<br />

Installation strategy <strong>and</strong> field study<br />

A typical urban, six lane, divided carriageway on NH-2 was<br />

selected for the study. Two locations, a mid block <strong>and</strong> a<br />

signalised T intersection, were selected for the installation<br />

of cameras. At each location, two video cameras – one fixed<br />

<strong>and</strong> one Pan-Tilt <strong>and</strong> Zoom (PTZ) – were set up. The fixed<br />

cameras covered six lanes of the carriageway while the PTZ<br />

cameras covered three. Incident detection <strong>and</strong> traffic flow<br />

data from all four cameras was collected over an entire day,<br />

from 9 am to 5 pm.<br />

IRF BULLETIN SPECIAL EDITION: URBAN MOBILITY | | 14

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