CAN COMMUTERS BE TEMPTED NOT TO USE THE CAR IN THE PEAK HOUR FOR A MONETARY REWARD?

Instead of giving a negative incentive such as transport pricing, a positive incentive by rewarding travelers for ‘good behavior ’ may yield different responses. In a Dutch pilot project called Peak Avoidance (in Dutch: “SpitsMijden”) a few hundred travelers participated in an experiment in which they received on average 5 euros per day when they avoid traveling by car during the morning rush hours (7h30–9h30). Mainly departure time shifts were observed, but also route changes and switching to public transport was observed. Due to the low number of participants in the experiment, no impact on traffic conditions could be expected. In order to assess the potential of such a rewarding scheme on traffic conditions, a dynamic traffic assignment model has been developed to forecast network wide effects in the long term by assuming higher participation levels. This paper describes the mathematical model. Furthermore, the Peak Avoidance project is taken as a case study and different rewarding strategies with varying participation levels and reward levels are analyzed. First results show that indeed overall traffic conditions can be improved by giving a reward, where low to moderate reward levels and participation levels of 50 % or lower are sufficient for a significant improvement. Higher participation and reward levels seem to become increasingly counter-effective