1951 年 24 巻 10 号 p. 344-352
The author did research on the number of passengers at each station, the distances covered by the passengers and railway traffic density in Hokkaido during 1949. The research was based on railway passengerr statistics of the same year.
Passenger-traffic density between Sapporo and Otaru is more than 66, 000 persons per day (single trips), while in local areas, less than 250 persons (Fig. 1). It is observed that there is negative correlation bettieeu the numbers of passengers and the distances covered (Fig. 2). The amount of passenger-traffie between the two principal cities is the function of the populations and the distances between the two. For enovenierce sake the following marks are used: n=number of passenger in one year, A=population of a city (in 10, 000). B population of the other city (in 10, 000). Then a formula m=_??_ is made. In this case “m” is called the traffic rate. It is noticed that the following relationship exist between “m” and “D”km. (distance between the two cities):
log. m=a-b log.D
The absolute value of. “b” decreases in the case of a larger city, while it increases in the case of a smaller town (Fig. 4).
In Hokkaido the frequency distribution of each station based on the number of its passengers has logarithmic normal distribution (Fig. 5). Especially at those stations where the numbers of passengers are from 1, 000 to 100, 000 (in a month) the distribution is in a straight line on the probability paper (Fig. 6). Therefore the author classified those stations, in strata, and indicated their distribution on the map (Fig. 7). Research was made of the distances covered by passengers at 25 stations. The average distance covered is 61km. in Hokkaido. At large stations more than 75% of all passengers make trips shorter than the average distance, and at small stations more than 90% make shorter trips. The percentage of passengers who make trips shorter than 30km. is very large. The average distance covered by the passengers in Hokkaido is the longest throughout Japan. Yet even in this area the passengers making trips shorter than 60km. constitute a great majority. This feature may be said. to be one of the characteristics of Japanese railway passenger traffic.