Abstract
The Advanced Cruise-Assist Highway System (AHS) functions to improve the safety of road traffic by using road infrastructure sensors to detect various dangerous conditions that drivers and vehicle-side sensors cannot detect on their own, and using communications technology to provide that information to the drivers. Research and development for practical application of AHS has proceeded according to the Smart Cruise Systems Infrastructure Requirements (Primary), formulated in October 1999. These proving tests of the element technologies and systems that had been the subject of research and development have finally brought this program to the point of embarking on the process of practical application.
