Seeking Factors to Increase the Public's Acceptability of Road-Pricing Schemes

User acceptability has become a critical issue for the successful implementation of transport pricing measures and policies. Although several studies have addressed the public acceptability of road pricing, little evidence can be found of the effects of pricing strategies. The acceptability of alternative schemes for a toll network already in operation is an issue to be tackled. This paper contributes to the limited literature in this field by exploring perceptions toward road-pricing schemes among toll road users. On the basis of a nationwide survey of toll road users in Spain, the study developed several binomial logit models to analyze user acceptability of three approaches: express toll lanes, a time-based pricing approach, and a flat fee (vignette) system. The results show notable differences in user acceptability by the type of charging scheme proposed. Express toll lanes were more acceptable by travelers who perceived greater benefits from saving travel time. The acceptability of time-based approaches (peak versus off-peak) decreased for users who felt forced to use the toll road, whereas this was not an aspect that significantly influenced users’ support for flat fee schemes. In addition, a flat fee strategy was more acceptable for long-distance trips and truck drivers who regularly used the toll facilities. The results from this analysis can inform policy makers and planners for the promotion of more efficient, socially inclusive, and publicly acceptable road-pricing schemes.