Cameras and Intelligent Transportation Systems
Links from David Fletcher’s blog:
In Salt Lake city, their new Advanced Management Traffic System (ATMS) in 2000:
the ATMS provides instrumentation on 70 miles (112 km) of area freeways. The system includes closed circuit TV (CCTV) camera coverage every 3,300 ft (1,000 m), traffic monitoring systems that entail embedded loop detectors and microloops approximately every 2,640 ft (800 m), 31 variable message signs (VMS) located on the freeway, four weigh-in-motion stations on the I-15 corridor, seven roadway weather information stations (RWIS), and a fully redundant, self-healing fiber optic backbone communications system. (Link from Jan 2000)
Commonly referred to as the largest single highway construction contract in U.S. history, the ATMS equipment within the area’s infrastructure costs about $70 million (US). “It should be noted that only a small portion of this amount was within the reconstruction area of I-15 itself,” said Mike Holling, vice president of TransCore, UDOT’s ATMS systems manager. ” Funded by a combination of state and federal funds, the total cost of the I-15 reconstruction plan is $1.318 billion. Seven public agencies provided funding for the CommuterLink project. These agencies include: UDOT; Salt Lake City; Salt Lake County; the Federal Highway Administration; Utah Transit Authority; Wasatch Front Regional Council; and the Department of Public Safety. Built for a cost of $80 million, of which nearly 25% was federal aid funds, the TOC functions 18 hours a day, 7-days a week with two operators on duty.
Several years later the system is described as (note the cost savings!):
A recent advanced transportation management system (ATMS) evaluation identified the benefits that Utah’s Salt Lake Valley system is providing. The study quantified the value that each individual ATMS component provides based on delay, safety and emissions. These individual components included: ramp meter, CCTV, variable message signs (VMS), incident management teams (IMT) and traffic-signal coordination. In the Salt Lake Valley, there are over 900 traffic signals. The system communicates via fiber optics to more than 600 traffic signals, communicating through the three regional transportation operation centers (TOCs). The fiber system cost over $51 million to install, almost half the entire ATMS system costs. The estimated annual ATMS benefit is $179 million. The traffic-signal coordination effort accounts for 87% of the system-wide social benefit. (Link)
Fletcher also mentions the San Antonio system (live data) it comprises of:
The TransGuide system has expanded to include over 140 cameras, 150 Dynamic Message Signs, 150 Lane Control signal Systems, and over 1000 traffic sensors. The communication network is comprised of a fiber optic cable network stretching over 100 miles with over 120 fiber network communication cabinets. (Link)
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