The Illinois DOT enhanced work zone safety on I-55 by deploying an automated traffic control system that posted traffic information and enforcement updates (number of citations issued) on dynamic message signs located upstream of the work zone.
The DMSs displayed a variety of messages including delay information, lane closure advisories, and the number of citations for moving violations. The CCTV camera images were used to confirm traffic and incident data. The central computer monitored traffic flow data from the vehicle detectors, calculated delay at each detector location, automatically displayed preprogrammed messages on DMSs, updated a real-time traffic condition map on the project website, and provided congestion and incident alerts for Illinois DOT staff via email or pager.
Although no official evaluation of the RTTCS was performed, DOT officials were satisfied with the performance of the system. There were only two crashes in the work zone due the lack of traffic backups and ample motorist warnings provided via DMSs. Safety was also enhanced by advisory messages on the number of citations that had been issued in the work zone. DOT staff reported a significant decrease in the number of moving violations after the system began displaying these messages.
Author: Scriba, Tracy, and David Register
Published By: Federal Highway Administration, U.S. DOT
Source Date: October 2004
EDL Number: 13984
Other Reference Number: Report No. FHWA-HOP-04-018URL: http://ntl.bts.gov/lib//jpodocs/repts_te/13984.htm
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Intelligent Transportation Systems > Roadway Operations & Maintenance > Work Zone Management > Temporary Traffic Management
Intelligent Transportation Systems > Roadway Operations & Maintenance > Information Dissemination > Dynamic Message Signs
Intelligent Transportation Systems > Roadway Operations & Maintenance > Information Dissemination > Internet/Wireless/Phone
Intelligent Transportation Systems > Traveler Information > Pre-Trip Information > Internet/Wireless
Intelligent Transportation Systems > Roadway Operations & Maintenance > Work Zone Management > Lane Control
Typical Deployment Locations
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