Discussion of a new adaptive speed control system incorporating the geometric characteristics of the roadway

In this paper, different control systems are reviewed, classified and analysed as well as intelligent speed adaptation systems (ACCs, ISA), their objectives and prototypes implemented in different countries. After this discussion, an adaptive speed control system, based on the geometric characteristics of the road, is presented. The SAGE system, developed in the INSIA (University Institute for Automobile Research), consists of a real time electronic device for the driver information about the optimum driving velocity, taking into account driving safety criteria. These criteria have been defined considering the geometric characteristics of the road and the dynamic behaviour of the vehicle. The prototype developed is presented, and also its strategy and functions.