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Highway automation technologies have been proposed in an attempt to ameliorate the urban problem of congestion and, to a lesser extent, air pollution. The methodology developed to analyze the impacts of an automated highway system in the Southern California region in 2025 is addressed in this paper. An automated highway system scenario is selected from several alternatives based on sensitivity analyses that allow for variability in network location, total network miles, and market penetration of vehicles equipped with automation features.

The development of a robust, unified systems architecture is an important problem in IVHS technology. This paper presents a sketch of a general architectural framework within which IVHS systems can carry out a wide range of management and control functions. The most important aspect of the work reported here is the definition of two parallel and compatible architectures suitable in the first case for ATMS and ATIS functions, where the driver controls the vehicle, and in the second case for AVCS functions, where the vehicle is under automatic control.