In Georgia, the Navigator incident management program reduced secondary crashes from an expected 676 to 210 in the twelve months ending April 2004.

August 2006
Atlanta,Georgia,United States

Summary Information

The Georgia DOT Intelligent Transportation System, known as NaviGAtor, covers 140 freeway miles in the Atlanta metropolitan area. The NaviGAtor system includes a traffic management center (TMC), freeway management components, advanced traveler information systems, and an incident management program. TMC operators use vehicle detectors, closed circuit television (CCTV) cameras, dynamic message signs (DMS), and ramp meters to collect traffic data and manage incidents. When TMC operators identify an incident, they dispatch a Highway Emergency Response Operator (HERO) to provide motorist assistance or traffic control, and disseminate traveler information via DMS, the NaviGAtor web site (, and a telephone information service (*DOT or 404-635-8000).

The benefits of the NaviGAtor incident management program were determined during a before-and-after study that analyzed twelve months of data (i.e., May 2003 to April 2004) from incident logs. The "before" conditions were estimated by analyzing incident information when a HERO could not respond, analyzing incidents that occurred outside of the NaviGAtor coverage area, and using public safety dispatch logs and personnel surveys to predict incident timelines when no NaviGAtor resources were employed. By comparing "before" conditions with "after" conditions when NaviGAtor incident management strategies were utilized, the benefits were determined in four areas: safety, mobility, energy and environment, and productivity.


The incident management program reduced secondary crashes in the NaviGAtor coverage area by 69 percent. It was estimated that the secondary crash rate was reduced from 676 to 210 crashes annually.

This study determined the benefits of the incident management program only. It did not quantify all of the benefits of the NaviGAtor system.

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Benefits Analysis for the Georgia Department of Transportation NaviGAtor Program: Final Report

Author: Guin, Angshuman, et al. (URS Corporation and Georgia DOT)

Published By: Georgia DOT

Prepared by URS Corporation for the Georgia DOT

Source Date: August 2006



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Benefit of the Month for December, 2006 !

Goal Areas


Typical Deployment Locations

Metropolitan Areas


freeway service patrol, courtesy patrols, highway helpers, freeway service patrols, DMS, CMS, VMS, Changeable Message Signs, Variable Message Signs

Benefit ID: 2006-00297