Browsing by Author "Dijst, Martin"

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    Impact of traffic zones on mobility behavior in Tehran, Iran
    (Journal of Transport and Land Use, 2017) Salarvandian, Fatemeh; Dijst, Martin; Helbich, Marco
    The use of private cars has increased rapidly in developing countries, causing congestion and pollution in cities. In Iran, measures have been taken to manage the extensive automobile use in Tehran. Two downtown traffic zones were introduced: The Restricted Traffic Zone (RTZ) based on pass permission and the Odd-Even Zone (OEZ) based on license-plate number. This article investigates how and to what extent traffic zoning influences mobility behavior in Tehran. Two neighborhoods within these zones and one elsewhere were selected to compare the impact of traffic zoning on mode choice and travel time by means of regression analyses. The results show that zoning has decreased driving in both neighborhoods; although compared to the RTZ, the OEZ has had a limited impact. While car use has diminished in both neighborhoods compared to the area without restrictions, travel time has increased in the traffic zones. An explanation might be the low quality of the infrastructure for alternative modes (e.g., cycling). Tehran's spatial functional specialization and the monocentric urban structure induce more car trips and longer travel times, regardless of traffic restrictions. Policymakers are advised to integrate restrictions on automobile use with improvements in public transport to enhance the impact of traffic zones.
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    Mode choice in access and egress stages of high-speed railway travelers in China
    (Journal of Transport and Land Use, 2019) Yang, Haoran; Dijst, Martin; Feng, Jianxi; Ettema, Dick
    High-speed railway (HSR) has become a sustainable transport mode for inter-city travel, especially in China. As public transport (PT), the use of HSR involves access and egress to and from HSR stations. However, the literature focusing on the intra-city mode choice of HSR travelers is limited, especially regarding their differential socio-demographic and trip characteristics. This paper aims to fill that gap with an analysis of access/egress mode choice for business and leisure journeys in the Yangzi River Delta region. Using the HSR survey from Fudan University, we found that in China older and wealthier travelers have a strong preference for car use. For leisure travel, the explanatory power of the socio-demographic variables is much more influential in the egress than the access stage. With increasing access time, business travelers may be enticed to shift to a faster form of PT (e.g., subway rather than bus) in the access stage. With increasing line-haul time, only business travelers have a stronger preference for car use as their intra-city mode choice for business activities. A higher number of subway lines and diversity of land use around HSR stations is associated with less car use for business travelers in the egress stage.