抄録
The purpose of this study is to develop a method to evaluate the advantage of position based on route information. First, we defined the advantage of position using the amount of route information description which considers passing on the way. Next, we calculated the expected value of the amount of route information description by solving the following three problems : [1] we asked for the rate of branch in the course actually used in the informed route, and made a tree using it ; [2] the probability that one can pass arbitrary nodes on a route is estimated ; [3] the expected number of the pairs of two adjoining nodes which can pass on the way is calculated by the probability acquired by [2] on the way obtained by [1]. By using the above-mentioned expected value, we compared the advantage of position of several points and analyzed the feature of street network form.
