Human Factors in Intelligent Transportation Systems

By Woodrow Barfield; Thomas A. Dingus | Go to book overview

CHAPTER
5
HUMAN FACTORS DESIGN OF AUTOMATED HIGHWAY SYSTEMS
Lee Levitan Honeywell Technology Center John R. Bloomfield The University of IowaUsing the most recent notions, an automated highway system (AHS) is defined in general as a system that combines vehicle and roadway instrumentation to provide some level of automated ("hands off /feet off") driving. The vehicles, all dual mode in nature, are capable of functioning on both normal and automated roadways, which generally are roadways equipped to control the speed and steering of an appropriately instrumented vehicle. As envisioned, automated roadways will use existing rights-of-way, and will evolve from current highway structures. Benefits of an automated highway system include the following:
Improved safety for vehicles in automated lanes,
Increased efficiency,
Predictable trip times,
Reduced environmental pollution due to a decrease in fossil fuel consumption and emissions, and
Reduced stress for those traveling in an automated lane (as compared with manual driving) ( National Automated Highway System Consortium, 1995, pp. 13-14).

There have been numerous visions or scenarios of a proposed AHS that vary along several dimensions, including the following (see Tsao, Hall, Shladover , Plocher, & Levitan, 1993, for detailed examples of scenarios that vary along these dimensions):

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