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原文传递 Impact of Capacity Definition on the HCM-6 Passenger Car Equivalent Values

题名：	Impact of Capacity Definition on the HCM-6 Passenger Car Equivalent Values
正文语种：	eng
作者：	Antonio Hurtado-Beltran;Laurence R. Rilett
作者单位：	School of Civil Engineering Edificio de Posgrado de Ingenieria Civil Universidad Michoacana de San Nicolas de Hidalgo Ciudad Universitaria Francisco J. Mujica S/N Colonia Felicitas del Rio Morelia Michoacan 58030 Mexico;Transportation Research Institute Auburn Univ. 345 W Magnolia Ave. Auburn AL 36849
关键词：	Highway capacity manual (HCM); Passenger car equivalency (PCE); Capacity adjustment factor (CAF); Capacity; Freeway; Microsimulation; VISSIM
摘要：	In the current version (Version 6) of the Highway Capacity Manual (HCM), equal-capacity passenger car equivalencies (EC-PCEs) are used to account for the effect of trucks for capacity analyses. The EC-PCEs for freeway segments were estimated using a microsimulation-based methodology in which the capacity of different traffic scenarios was modeled. However, the current EC-PCEs were estimated under assumptions atypical of past HCM releases, including a new definition of capacity and a new data aggregation level. It is important to assess to what extent these assumptions may affect the passenger car equivalencies (PCE) values published in the HCM-6. Consequently, this paper compares the HCM-6 PCEs, and associated capacity adjustment factors (CAP), with values developed using the HCM-6 EC-PCE methodology with historic HCM assumptions. It was found the EC-PCE values from the proposed approach were, on average, 18.2% greater than those published in the HCM-6. This finding suggests the values published in the HCM-6 could underestimate the effect of trucks in capacity and level of service analyses.
出版年：	2022
期刊名称：	Journal of Transportation Engineering
卷：	148
期：	7
页码：	04022038.1-04022038.11