Design options for operating automated highway systems

Automated Highway Systems (AHS) have the potential for offering large capacity and safety gains without requiring significant amounts of additional right-of-way. The feasibility of an AHS hinges upon the automation technology, including the vehicle design, infrastructure design and operating strategy. The major design options for operating a fully automated AHS are discussed. For each of the options, the major potential impact on AHS performance is indicated. Six fully automated AHS operating scenarios featuring variations in three design options critical to the human factors of AHS operations are proposed.