A real-time work zone traffic control system leased by the Illinois Department of Transportation cost $785,000.
The traffic sensors used X-Band radar to automatically collect vehicle speed and presence data which was transmitted to the central base station server. The central server calculated volume and traffic speed and generated predetermined messages based on the level of traffic congestion. Real-time traffic conditions such as delay information and lane closure advisories were automatically transmitted and displayed on the portable DMS and IDOT’s website. The system updated the website every five minutes based on congestion levels in the work zone. IDOT staff was automatically notified of congestion and incident detection alerts. Images from the portable cameras were used to confirm data generated by the system. Solar arrays provided power source for the battery-operated roadside equipment.
The RTTCS was designed based on IDOT staff developing a set of functional requirements and then comparing the approach proposed by the vendor. After finalizing the system design, the resulting system was leased by the prime contractor from a firm specializing in work zone systems. IDOT indicated significant cost savings by leasing the RTTCS as a bid item. The cost of leasing the system was $785,000 which represented approximately 2 percent of the total reconstruction contract cost of $35 million. The system was deployed for a total of 16 months from February 2001 to May 2002.
The lease included a provision for contractor personnel to monitor the system and provide 24-hour maintenance support. The system operated in an automatic mode; however, one person was assigned to check system performance periodically during week days. After hours and during weekends, contractor personnel were on-call to handle problems. The terms and conditions of the lease agreement stipulated fines for system deficiencies if not corrected within a specified time.
See Also: the system cost summary for Intelligent Transportation Systems in Work Zones – A Cross Cutting Study
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 > Road Closure Management
Intelligent Transportation Systems > Roadway Operations & Maintenance > Work Zone Management > Temporary Incident Management
Intelligent Transportation Systems > Roadway Operations & Maintenance > Work Zone Management > Temporary Traffic Management
Intelligent Transportation Systems > Roadway Operations & Maintenance > Information Dissemination > Internet/Wireless/Phone
Intelligent Transportation Systems > Roadway Operations & Maintenance > Information Dissemination > Dynamic Message Signs
Intelligent Transportation Systems > Transportation Management Centers > Temporary TMCs > Work Zones
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