United States Department of Transportation
i
National evaluation of the FY 2003 Earmarked ITS Integration Project : Southern Wyoming, I-80 dynamic message signs, final phase III evaluation report.
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2010-12-01
[PDF-1.93 MB]
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NTL Classification:NTL-INTELLIGENT TRANSPORTATION SYSTEMS-Traveler Information;NTL-HIGHWAY/ROAD TRANSPORTATION-HIGHWAY/ROAD TRANSPORTATION;NTL-PLANNING AND POLICY-Surveys;NTL-SAFETY AND SECURITY-Highway Safety;
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Abstract:This report presents the results for the national evaluation of the FY 2003 Earmarked ITS Integration Project: Southern Wyoming, I-80 Dynamic Message Signs. The I-80 Dynamic Message Signs project is a rural infrastructure deployment of ITS devices that were integrated with existing WYDOT transportation management systems. The devices include DMS, speed sensors, blank-out signs, Highway Advisory Radio (HAR), Environmental Sensor Stations (ESS), and Closed-Circuit Television (CCTV) camera systems, and the associated communications infrastructure necessary to operate these devices.
This report presents the findings of the system impacts and lessons learned for the ITS deployment on I-80 between Cheyenne and Laramie. The system impact study investigated the expected outcomes of the system in terms of safety, mobility, and customer satisfaction. The lessons learned were produced based on stakeholder experiences and are intended to be useful for other agencies developing a similar system.
Overall, the I-80 DMS Project has been found to result in several positive outcomes. The CCTV cameras have been very effective in improving WYDOT’s ability to identify, verify, and respond to hazardous weather, road, and travel conditions. The DMS and other travel information dissemination sources appeared to be mostly effective in controlling traffic speeds, however, the effect on speeds appear to be dependent on a variety of factors (type of weather, road condition, how conditions are changing, type of vehicle, driver’s perception of accuracy, message type, message consistency, etc.). The before and after comparison of crashes found that overall traffic crashes, injury crashes, and fatal crashes were reduced. Intercept surveys and local traveler panel surveys found that travelers appear generally satisfied with the understandability, usefulness, and availability of traveler information.
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