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原文传递 Proposed Equations for HCM-6 Passenger Car Equivalent Values

题名：	Proposed Equations for HCM-6 Passenger Car Equivalent Values
正文语种：	eng
作者：	Hurtado-Beltran, Antonio;Rilett, Laurence R.
作者单位：	Univ Michoacana Sch Civil Engn Edificio Posgrad Ingn Civil Ciudad Univ Morelia 58030 Michoacan Mexico;Auburn Univ Transportat Res Inst 345 W Magnolia Ave Auburn AL 36849 USA
关键词：	Passenger car equivalency (PCE);Highway capacity manual (HCM);Capacity adjustment factors (CAF);Capacity;Freeway;Regression
摘要：	In the current version of the Highway Capacity Manual (HCM-6), the equal capacity passenger car equivalency (EC-PCE) method is used to account for the effect of trucks for capacity analyses. The EC-PCEs for freeway segments were estimated using a microsimulation-based methodology where a nonlinear regression model (NLRM) with 15 model parameters was used to develop capacity adjustment factor (CAF) models using the microsimulation data as input. The objective of this paper is to introduce a simpler nonlinear regression model with 6 model parameters that can be used for the estimation of CAF values and EC-PCE values for freeway and multilane highway segments. It was found that the proposed model can readily substitute the original model with little loss in fidelity. The CAF formulae developed in this paper can be used to calculate EC-PCE values directly, obviating the need for the HCM-6 EC-PCE tables. Equally important, the simpler models provide the user with a better understanding of the trade-offs between capacity, CAF, and EC-PCE values and the parameters that affect them.
出版年：	2022
期刊名称：	Journal of Transportation Engineering
卷：	148
期：	1
页码：	04021104.1-04021104.8