Benefit

In Georgia, the HERO motorist assistance patrol program and NaviGAtor incident management activities saved more than 187 million dollars yielding a benefit-to-cost ratio of 4.4:1.


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 (www.georgia-navigator.com), 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.

RESULTS

The benefits above and the value of HERO motorist assistance resulted in a cost savings of more than 187 million dollars, which was used to calculate a benefit-to-cost ratio of 4.4:1. These productivity benefits are summarized in the table below.

Cost Savings due to NaviGAtor Incident Management Program


Category

Cost Savings
(2003 dollars)

Secondary Crash Reduction

$1,611,054

Incident Delay Reduction

$152,053,180

Fuel Consumption Reduction

$10,365,969

CO Emissions Reduction

$1,247,985

HC Emissions Reduction

$15,626,587

NOx Emissions Reduction

$3,368,436

Assistance to Travelers

$2,955,323

Total Cost Savings

$187,228,535

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Source

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

URL: http://www.ops.fhwa.dot.gov/travelinfo/gdotbenefit/gdotfinalreport_0806.pdf

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Benefit ID: 2007-00466