Lane-harmonised passenger car equivalents for heterogeneous expressway traffic

Jian Sheng Yeung, Yiik Diew Wong and Julius Raditya Secadiningrat

Transportation Research Part A: Policy and Practice, 2015, vol. 78, issue C, 361-370

Abstract: In order to account for variations in traffic composition during traffic analysis, passenger car equivalent (PCE) factors are used to convert flow rates of various vehicle classes into flow rates in terms of passenger car units (PCUs). Earlier studies have developed various methods to estimate PCE values but only a few of them are based on uninterrupted traffic flow, particularly for flow regimes with heterogeneous traffic where differential (lower) speed limits are imposed on commercial vehicles. This paper proposes a lane-harmonisation approach, which leverages on the high variation in traffic composition across the lanes, to estimate PCE factors for urban expressways. Multiple linear regression is used and the PCE factors obtained for motorcycles, light goods vehicles, and heavy goods vehicles are 0.65, 1.53, and 2.75, respectively. The estimated capacity flow rate after the application of the obtained PCE factors is around 2200 PCUs per hour per lane.

Keywords: Passenger car equivalent; Passenger car units; Urban expressways; Heterogeneous traffic; Differential speed limits; Multiple linear regression (search for similar items in EconPapers)
Date: 2015
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Citations: View citations in EconPapers (5)

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DOI: 10.1016/j.tra.2015.06.001

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