01554412

Component

https://doi.org/10.3141/2503-10

Ecospeed control is an advanced ecodriving or ecovehicle control algorithm that uses signal phasing and timing information from signalized intersections to generate fuel-optimum vehicle trajectories. The proposed algorithm uses connected vehicles technology to communicate between vehicles and the infrastructure. The research presented in this paper integrates the algorithm with state-of-the-art traffic simulation software, in this case the INTEGRATION software, to develop a tool capable of analyzing and evaluating systemwide impacts. The algorithm uses dynamic programming to generate fuel-efficient vehicle trajectories in the vicinity of traffic signalized intersections by controlling the vehicle variable limiting speed (VLS) to minimize fuel consumption while maintaining safe car-following behavior. Ecospeed control uses constraints upstream and downstream of the intersection to generate a longitudinal VLS function. Multiple simulations for levels of congestion (volume-to-capacity ratios) and levels of market penetration suggest that the average fuel savings per vehicle are in the range of 26% when all vehicles are equipped with such systems. Similarly, the average reduction in total delay reaches 65% within the vicinity of traffic signalized intersections. The results also demonstrate that at levels of market penetration less than 50%, the system does not produce systemwide fuel and delay savings. In addition, the savings are higher for lower levels of traffic congestion.

01578185

15-4290

English

pp 91–99

2015

Transportation Research Record: Journal of the Transportation Research Board

9780309295802

Print

Figures (6) ; Photos; References (22) ; Tables (2)

Algorithms; Automatic speed control; Ecodriving; Fuel consumption; Mobile communication systems; Signalized intersections; Traffic congestion; Traffic signal timing; Traffic simulation; Vehicle trajectories

Energy; Environment; Highways; Vehicles and Equipment; I15: Environment; I91: Vehicle Design and Safety

TRIS, TRB, ATRI

Dec 30 2014 1:24PM

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