Freeway drivers’ willingness‐to‐pay for a distance‐based toll rate

This paper applies the contingent valuation method to investigate and estimate the toll rate that freeway drivers are willing‐to‐pay (WTP) for each unit of distance they travel, after switching from per‐entry based to distance‐based tolling system. Due to a large portion of respondents who are unwilling to pay a toll at all, we adopt the spike model to avoid estimation errors. The estimation results show that average willingness to pay toll is TWD 0.86/km, which can be refined further to TWD 0.81/km for short distance travelers, TWD 0.93/km for medium distance travelers, and TWD 0.97/km for long distance travelers. Additionally, the WTP toll rate of short distance travelers is significantly different on public holidays but not during peak hours. In contrast, the WTP toll rates of medium and long distance travelers significantly different during peak hours but not on public holidays.