subscribe to this page
Abstract
The derived nature of transportation demand implies that enhancement of mobility per se is not a reasonable goal for transportation policy; instead, improved mobility is desired to the extent that it furthers accessibility—a goal that can be achieved through a variety of measures. The paper uses the mobility–accessibility distinction to distinguish different implementations of congestion pricing. A mobility-based congestion pricing promises to alleviate congestion but threatens to deteriorate from overall regional accessibility as it accelerates metropolitan deconcentration. In contrast, accessibility-based congestion pricing avoids acceleration of sprawl by incorporating policies to ensure that drivers tolled off roads are replaced with residents and travelers arriving at previously congested areas by other means.
Through estimation of a discrete choice model of residential location, this study argues that commute time remains a dominant determinant of residential location at the regional scale, and that provision of affordable housing near employment concentrations can influence residential location decisions for low-to-moderate-income, single-worker households. However, the significance of jobs-hunting balance is not in reducing congestion; even when successful, such policies will have little impact on average travel speeds. Rather, the relaxation of suburban regulation that could lead to improved matches between home and workplace is seen as enhancing the range of households' choices about residence and transportation.