The Illinois DOT reduced operating costs during the reconstruction of I-55 by deploying an automated traffic control system and eliminating the need for constant traffic monitoring.
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. The automated system design minimized operating costs by eliminating the need for constant monitoring, since the appropriate personnel were automatically alerted only when human intervention was needed. Further, the DOT avoided hardware procurement costs by securing use of the system only for the 15-month duration of the project.
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 > Lane Control
Intelligent Transportation Systems > Roadway Operations & Maintenance > Work Zone Management > Temporary Traffic Management
Intelligent Transportation Systems > Roadway Operations & Maintenance > Information Dissemination > Dynamic Message Signs
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