Driver comprehension of diagrammatic freeway guide signs

Driver comprehension of diagrammatic freeway guide signs

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This report contains the results of a three-phase human factors study which tested driver comprehension of diagrammatic freeway guide signs and their text alternatives. Four different interchange types were tested: left optional exit, left lane drop, freeway to freeway split with optional center lane, and two lane right exits with optional lanes. Three phases of the project tested comprehension by using digitally edited photographs of advance guide signs in freeway scenes. Participants viewed a computer slideshow in which slides were shown for only three seconds to simulate a single driver eye glance at a sign. All signs were mounted overhead in the photographs. Participants were provided a route number and city name as a destination that could be reached either by the through route or the exit route. They indicated which lane or lanes they would choose to reach the given destination. The fourth phase of the study used a fixed-base driving simulator which presented full sign sequences consisting of two advance guides and one exit direction sign. This report also contains an extensive literature review of previous work in the area, a discussion of testing methodology, and suggestions for future research.In order to identify a wide variety of configurations that a Texas driver might encounter, researchers explored prevalent reference documents, including the TxDOT Roadway Design Manual and the American Association of State Highway andanbsp;...

Title:Driver comprehension of diagrammatic freeway guide signs
Author: Susan T. Chrysler, Texas. Dept. of Transportation, United States. Federal Highway Administration, Texas Transportation Institute
Publisher: - 2007

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