Harutoshi Yamada

Lightweight lane positioning of vehicles using a smartphone GPS by monitoring the distance from the center line

This paper presents a simple method for using the separation distance (offset) between a smartphone GPS and the center line on a digital road map to determine the lane position of a car. The method was verified.

Modeling Traffic Accidents Occurrences Based on Land Use and Road Factors Using Geographically Weighted Regression Models

Many researches regarding road traffic safety have been trying to identify the factors, which have significant effects on the probability of traffic accidents occurrences, and factors such as climate and road related factors have been proven to have substantial effects on the issue. On the contrary, in Japan, land use factors have not been mentioned by many of the researches because the positional information of traffic accidents was unavailable until recently; and, therefore, their momentous effect on traffic accidents occurrences unrevealed. In this paper, road related factors, such as traffic volume, lengths of various road types and number of intersections have been ana- lysed along with land use factors aggregated based on 1 × 1 km grid mesh of Tokyo to investigate the influence of these factors on traffic accidents occurrences. This study could shed the light for the future policies for traffic safety aiming at reducing collisions and improving traffic safety.