From May, 2002 to March, 2003, the Ministry of Land, Infrastructure and Transport took the lead, installed study group, and performed examination and arrangement of the following subjects.

• To organize the understanding of how civil responsibility and liability are to be apportioned among road administrators, on-board equipment manufacturers, and the driver in the event that an accident is caused by a driver using the advanced cruise-assist highway system
• To study measures for obtaining the understanding of drivers concerning the system characteristics and methods of use