United States Department of Transportation
i
Evaluating the Impact of Clean Miles Standard on Transportation System: A Microscopic Simulation in San Francisco
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2024-04-22
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[PDF-2.32 MB]
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Edition:Final report (August 15, 2022 - August 14, 2023)
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Abstract:In California, the transportation sector accounted for about 50% of greenhouse gas (GHG) emissions when accounting for fuel production, and transportation network companies (TNCs) emerge as a growing source of vehicle-miles-traveled (VMT) and GHG emissions. As directed by Senate Bill (SB) 1014, the California Air Resources Board (ARB) developed the Clean Miles Standard Program reduce to GHG emissions from TNC vehicles and increase the use of zero-emission vehicles (ZEV). This research investigates the potential benefits and impacts of the electrified TNC fleet at system level with the enforcement of Clean Miles Standard in California. A microscopic traffic simulator, SUMO, was utilized to develop the TNC mixed electric fleet operation scenarios. Two optimization modules were proposed to support order dispatching and EV charging station assignment tasks. A case study was conducted using TNC demand data from San Francisco with different ratios of EVs in the mixed fleet. The results indicate that higher electrification levels in the TNC fleet lead to a slight increase in rider average waiting time and driver empty distance due to the charging needs of EVs during operating hours, but TNC fleet electrification yields significant reduction in CO2and criteria air pollutant emissions.
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