Curve Fitting of Journey-to-work Preference Functions

A Case Study of Sapporo City (1972-1983-1995)

Abstract

This paper analyzes the curve fitting of journey-to-work preference function in Sapporo using person trip data for 1972, 1983 and 1994. The curve fitting was examined in consideration of the correlation coefficient andthe residual of the observation value and the estimated value based on the characteristics of journey-to-work preference function. The quadratic curve improves the curve fitting in contrast with the logarithm curve from the correlation coefficient and the goodness measure in the case of Sapporo. Relationship between the estimated coefficients, the classifications of zonal travel behavior and relationship between the changes in preference function and the changes of zonal mean trip length are also analyzed based on the estimated coefficient of quadratic curve.