Welcome to DOT ITS Knowledge Resources
Intelligent transportation systems (ITS) provide a proven set of strategies for advancing transportation safety, mobility, and environmental sustainability by integrating communication and information technology applications into the management and operation of the transportation system across all modes. This website presents summaries on the benefits, costs, deployment levels, and lessons learned for ITS deployment and operations from over 20 years of ITS evaluation studies, research syntheses, handbooks, journal articles, and conference papers tracking the effectiveness of deployed ITS.
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- Added: 06/26/2016 - Overall benefit-cost ratio for traffic incident management-oriented ITS program estimated to be 3.16.
- Added: 06/26/2016 - Variable speed limit pilot found to be effective reducing the number of overall crashes.
- Added: 05/27/2016 - Deployment of special event signal timing plans has reduced queuing onto travel lanes of I-75 before events and reduced time for traffic to disperse after events to 90 minutes from 3 to 4 hours.
- Added: 05/26/2016 - The cost of O&M at the Arizona TMC was estimated at $2 million per year.
- Added: 05/22/2016 - Transit Signal Priority implemented in Chicago found a 4 to 15 percent reduction in bus travel time, 51 to 54 percent reduction in bus travel time variance, and annual fuel consumption savings of 131 gallons for bus routes 49 and X49.
- Added: 04/26/2016 - Augmented speed enforcement system in work zone significantly reduced the number of vehicles traveling in excess of 65 mph
- Added: 04/25/2016 - HOV to HOT Lane conversion results in 22 percent reduction in annual vehicle hours of delay.
- Added: 03/31/2016 - Capital costs of HOV conversion to HOT lanes total $8,716,000 with annual operating costs beginning at $1,294,922.
- Added: 03/31/2016 - Initial deployment of 47 variable speed limit signs to cost $12.5 million (CAD)
- Added: 03/29/2016 - Sixty-six percent of drivers changed their route following information provided by Iowa 511 system.
- Added: 03/29/2016 - Signal Priority operations shown to improve connected bus travel times by 8.2 percent and connected truck travel times by 39.7 percent.
- Added: 03/29/2016 - Tractor-trailor platooning enabled by V2V communications demonstrates fuel savings up to 9.7 percent.
- Added: 03/29/2016 - Forward collision warning systems with adaptive braking and anticipatory collision safety features can mitigate severity in 53 percent of rear-end collisions.
- Added: 02/09/2016 - Sequential Dynamic Curve Warning System reduces the number of vehicles exceeding the speed limit by 10 mph or more by 27.8 percent
- Added: 02/09/2016 - Animal Detection System in Blacksburg, VA detects animals with 95 percent reliability
- Added: 02/09/2016 - Plan carefully and test technologies rigurously prior to deployment when seeking support for ITS deployments on public transit.
- Added: 02/09/2016 - Archived data management systems benefit planning and decision-making within agencies
- Added: 02/09/2016 - Connected vehicles with a market penetration rate of 33 percent or more can support V2I applications and significantly reduce delays at urban intersections.
- Added: 02/09/2016 - Using sensors and traffic cameras for incident identification and verification yielded benefit-to-cost ratios of 6.54:1 and 12.47:1, respectively.
- Added: 02/09/2016 - Full ITS deployment in Seattle projects personal travel time reductions of 3.7 percent for drivers and 24 percent for transit users.
- Added: 02/09/2016 - Full ITS deployment in Seattle projects vehicle speeds to increase by as much as 12 percent on major roadways.
- Added: 02/09/2016 - Full ITS deployment in the Seattle area projected to reduce recurrent congestion delays by 3.2 percent and incident related delays by 50 percent.
- Added: 02/09/2016 - Full ITS deployment in the Seattle area projected to result in 8 percent fewer fatal crashes, and 3 percent fewer injury and property damage only crashes annually.
- Added: 02/09/2016 - Full deployment of comprehensive ITS strategies in Seattle are projected to reduce CO, HC, and NOx emissions by 16 percent, 17 percent and 21 percent, respectively and reduce fuel consumption by 19 percent.
- Added: 02/09/2016 - Controlled motorways offer improved travel time reliability and less stress for drivers, but in some cases costs can outweigh benefits.
- Added: 02/09/2016 - Connected vehicles that receive future state intersection signal control data to support predictive cruise control functions can reduce fuel consumption 24 to 47 percent.
- Added: 02/09/2016 - Multipath Signal Phase and Timing (SPAT) Broadcast Project demonstrating the Safe Green Passage application reveals many weaknesses that inhibit its usefulness.
- Added: 02/09/2016 - Traffic-light-to-vehicle communication systems can help drivers avoid braking and accelerating maneuvers and reduce fuel consumption 8 to 22 percent.
- Added: 02/09/2016 - Eco-Speed Harmonization and Eco-Connected Adaptive Cruise Control applications show results of up to a 22 percent reduction in energy and a 33 percent reduction in travel time.
- Added: 02/09/2016 - Low Emissions Zones concept can potentially reduce emissions by 15-18 percent.