2006 Volume 5 Issue 2 Pages 52-62
Sustainable cities are those where journey-to-work trip lengths are stabilizing or decreasing, and the control of residential and employment location is one policy instrument. As the journey-to-work trip length depends on the urban structure and travel behavior, an optimal commuting assignment problem is applied based on a model of zonal travel preference functions. The preference functions are transformed into quadratic functions using data for the journey to work in Sapporo and Hakodate, Hokkaido. The model is applied to estimate mean trip lengths from different zonal distributions of resident and employment.