Variations in mode-specific valuations of travel time reliability and in-vehicle crowding: Implications for demand estimation

Hao Li, Kun Gao and Huizhao Tu

Transportation Research Part A: Policy and Practice, 2017, vol. 103, issue C, 250-263

Abstract: This paper presents a two-stage Stated Preference survey to investigate the impacts of travel time reliability and in-vehicle crowding on the mode choice decisions across four different transport modes, i.e. car, metro, park and ride (P&R) and bus. The decisive attributes considered are average travel time, travel time reliability, cost and in-vehicle crowding. Five model specifications are defined for the parameter estimations. Significant interaction effects between in-vehicle crowding and travel time are found. Time multipliers are defined to represent the effects of in-vehicle crowding. In contrast, no evidence could be established for the interaction between in-vehicle crowding and travel time reliability. Results of the mode-specific valuations of travel time reliability and in-vehicle crowding, vary remarkably across the four different transport modes. In the mode-specific models, the range of time multipliers is estimated to be [1.44, 2.00]. Besides, demand estimates would be biased when the mode-specific willingness to pay (WTP) is ignored. For instance, the mode share of metro will be underestimated when its reliability level is high, and vice versa. This suggests that mode-specific WTP of travel time reliability and in-vehicle crowding should be considered in the demand estimations and in the earlier stage of public transport project appraisal.

Keywords: Mode-specific WTP; Time multiplier; In-vehicle crowding; Interaction effects (search for similar items in EconPapers)
Date: 2017
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Citations: View citations in EconPapers (12)

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DOI: 10.1016/j.tra.2017.06.009

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