On Designing and Implementation of Urban Intelligent Transportation System

The vehicle GPS and the vehicle navigation system is a base of the ITS. This paper elaborated the main function of vehicle terminal system and focuses on discussed the designing and implementation of the on vehicle system and it´s map database. The designing process, the map matching algorithm used in positioning by GPS and the optimal route search algorithm were explained by the view of software analysis. And then, the approach to store map data by combining vector map and scalar map, the map matching approach based on cost calculation and the optimal route search algorithm were analyzed. This paper also does some research on the improvement of the map matching algorithm.