United States Department of Transportation
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Abstract:The study demonstrates the feasibility of two eco-driving applications which reduces vehicle fuel consumption and greenhouse gas emissions. In particular, the study develops an eco-drive system that combines eco-cruise control logic with state-of-the-art car-following models and evaluates Eco-Lanes and SPD-HARM applications. The research investigated the potential of developing an eco-drive system that combines an Eco-Cruise Control (ECC) system with state-of-the-art car-following models. The system makes use of topographic information, the spacing between the subject and lead vehicle, and a desired (or target) vehicle speed and distance headway as input variables. The study demonstrated that the proposed system can significantly improve fuel efficiency while maintaining reasonable vehicle spacing. Furthermore, the study also demonstrated that a dynamic car-following spacing threshold significantly reduces the average vehicle spacing compared to a fixed car-following spacing threshold. The study finally demonstrated that non-ECC-equipped vehicles can significantly reduce their own fuel consumption just by following a lead ECC-equipped vehicle. Further, the research investigated the feasibility of Eco-Lanes applications that attempt to reduce system-wide fuel consumption and GHG emission levels through lane management strategies. The study demonstrated that the proposed Eco-Lanes system can significantly improve fuel efficiency and air quality while reducing average vehicle travel time and total system delay. The study also found that the optimum throttle levels and the optimum eco-speed limits can significantly improve the mobility and fuel economy.
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