1990 年 1990 巻 413 号 p. 139-142
A technique for estimating the number of intra-zonal work trips for each zone around the downtown areas has been dealt with in the authors' last paper. But there has been left a question to be studied in detail: How would the number of railway lines run radiately from each zone affect the number of intra-zonal work trips? In this study, the above question is mainly examined. A finding in this study is that the number of railway lines is not a basic factor which determines the number of intra-zonal work trips for each zone around the downtown areas. Therefore, the basic factors are the employment density and the zone area. The estimated numbers of intra-zonal work trips for 1980 from the model calibrated for the base year (1970) are compared to the actual figures in 1980. This comparison gives us a high degree of correlation.