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Citation |
Janssen W, Van Der Horst R. Transp. Res. Rec. 1993; 1403: 83. |
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Copyright |
(Copyright © 1993, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing) |
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DOI |
unavailable |
PMID |
unavailable |
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Abstract |
In a study of driving simulators the effects on route choice and driving behavior of presenting descriptive types of information on variable message (route guidance) signs were evaluated. Subjects had to choose between a normal route to a fixed destination, which could suffer from congestion of varying severity, and an alternative route. Three modes of variable information presentation were compared: (a) length of congestion, in kilometers; (b) delays relative to normal travel times, in minutes; and (c) travel times, in minutes. The reliability of the information was also varied and could be high, intermediate, or low. Thirty-six men participated in the experiment, and every subject made 123 runs in the simulator. By presenting descriptive information, divergence levels were found that varied widely over the range from 0 to 100%, as a function of the actual information given. This is to be compared with the inflexibility of conventional (prescriptive) signing. User optimum was most often reached by presenting travel time information. Such information also proved to be most resistant against degradations in reliability. There was an overall increase in driving speed when descriptive information was given, and this may be interpreted as anticipatory behavior from the side of the driver to compensate for the expected delay upon finding the normal route to be congested. Language: en |