SHOCKWAVE MITIGATION
Description
Shockwave mitigation aims to smooth the flow of traffic by damping traffic shockwaves. Real-time traffic data is used to feed advisory speeds to cars to smooth out speed variations. This service is applicable to all vehicle types and is particularly relevant to motorways.
Objectives
Use of cooperative roadside and in-vehicle systems can assist drivers to detect, dampen and resolve shockwaves.
Inputs
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Road side units (Cameras, wifi-p, shockwave damping control)
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SPITS OBU (Accelerometers, Gyrometers, GPS receiver, external USB devices)
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Telematic data from pilot car
Benefits
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Able to prevent traffic jams with no direct cause (incident, road works)
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Drivers can anticipate earlier on braking actions of predecessors
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According to reports, shockwave mitigation could help result in 5% decrease in CO2 emissions
Limitations
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Has no impact on urban roads
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Very small reduction in CO2 emissions (0.005%)
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No impact on fuel consumption for urban roads
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25% of SWD impact will be eliminated due to
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overlap by emergency brake light service
Scorecard
Shockwave Mitigation
Developed by TNO, TomTom, Peek Traffic
Project Status Demonstrated at A270 in Helmond
Communication
Protocol
IEEE 802.11p CALM FAST,
Cellular Communication (4G LTE, 3G, HSDPA, GPRS)
Project Outcomes
The system can damp shockwave almost completely within a minute. The effects measured on traffic throughput are slightly positive, and not negative
Refer to “Evaluation” for details on scoring.