Abstract
The objective of this paper is to evaluate the one-way traffic regulation in terms of travel efficiency and traffic volume. In general, imposing a one-way traffic regulation raises the average distance between fixed origins and destinations. However, it would reduce the traffic volume near city's center, so we have to utilize bicriteria approach. First, we derive analytically the distance distribution and the traffic volume distribution on a grid network. Second, we demonstrate that alternated traffic pattern is better than spiral pattern from efficient point of view. Finally, we examine the tradeoff between the average distance and the standard deviation of the traffic volume using the data of Shinjuku on Tokyo.