In North Carolina, a modeling study indicated that work zone delay messages reduced maximum traffic backups by 56 percent and contributed to 55 percent reduction in traveler delay.
The rehabilitation project covered a 19-mile section of I-95 and included multiple work areas. The design and size of each active work area was dependent on the location of detour routes, and need for lane closures and traffic controls. The segment of the work zone selected for analysis in this study was located between Milepost 150 and Milepost 154, and was about two miles long.
Baseline conditions were modeled using traffic information provided by the North Carolina DOT and traffic pattern data derived from the Highway Capacity Manual. To compare traffic conditions with and without ITS, two identical construction phases were simulated for one week each, with the only difference being the presence of ITS.
The results of the analysis indicated that when real-time work zone traffic information was provided; the maximum queue length decreased from 2.94 miles to 1.3 miles, maximum traveler delay decreased from 14.8 minutes to 6.6 minutes, and total user delay decreased from 21,955 hours per week to 5,476 hours per weekâ€”a reduction of 16,480 hours.
Estimating the Benefits of Deploying Intelligent Transportation Systems in Work Zones
Author: Bushman, R., and C. Berthelot
Published By: Paper presented at 83rd Annual Meeting of the Transportation Research Board. Washington, District of Columbia
Source Date: 11-15 January 2004.
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Intelligent Transportation Systems > Roadway Operations & Maintenance > Information Dissemination > Dynamic Message Signs
Intelligent Transportation Systems > Roadway Operations & Maintenance > Work Zone Management > Temporary Traffic Management
Intelligent Transportation Systems > Roadway Operations & Maintenance > Information Dissemination > Internet/Wireless/Phone
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