This study's aim is to find out what kinds of traffic safety information are needed by users. In this paper, point information is defined to represent traditional traffic signs situated on the road and linear information is defined to represent continuous information regarding the course of the road. Upon seizing how movements of vehicle change according to the quality and the quantity of the linear information, the study aims mainly to estimate the value of 'linear information. The following three results were attained in this study: (1) The concept of interactive vehicle information was established as an ITS platform; (2) The method of providing interactive vehicle information in ITS was examined; and (3) Based on the data obtained by social experiment, a driving simulator taking into account interactive vehicle information was developed. In the social experiment, it was proved that application of linear information by NN-CA on markets of portable terminals and other information services was possible. It was also indicated in comparative analysis of the test results that provision of information caused great changes in driving behaviour. There are following four future challenges: (1) Continue information provision experiments based on the results of the social experiment in this study using an information cycle of regional ITS to achieve more advanced regional ITS; (2) Select available data by a statistical method although random data were used for this study; (3) Measure the changes in driving behaviour and CVM evaluation by providing various types of linear information in the form of a scenario; and (4) Improve technologies such as the use of portable phones or car navigation systems to provide more real-time information.