DRIVERS ABILITY TO IDENTIFY SIGNS PAINTED ON THE CARRIAGEWAY

BILFOERARES FOERMAAGA ATT IDENTIFIERA VAEGMAERKEN MARKERADE PAA KOERBANAN

In two experiments drivers' ability to identify signs painted on the surface of the road was investigated under simulated conditions employing a model of a road (scale 1:10). Distances to the signs varied between approximately 25 and 45 meters. In Experiment 1 the subjects' task was to identify the letter E and distortions of E. In Experiment 2 the task was to identify digits in speed limits and road numbers as well as to indicate to which category they belonged. A total of 48 drivers, who immediately prior to the experiments had received their driving licences, participated as subjects. The results supported the following conclusions: 1) The letter E can be identified at a distance of 40 meters or more, given that the horizontal bar is not thicker than normally; 2) Increasing its height above 2.5 meters has a slight effect; 3) Compensation for reduction of the angle of view by distorting the form is probably not effective; 4) White speed limits are somewhat better than the standard colors; 5) A frame surrounding a road number has slight or no effect; and 6) Ease of identification of sign on the road surface varies greatly with how much detail different symbols contain.

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  • Corporate Authors:

    Umeaa University, Sweden

    Umeaa,   Sweden 
  • Authors:
    • Boeoek, A
    • GAERLING, T
    • Gaerling, F
  • Publication Date: 1989

Language

  • Swedish

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00605833
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: 1989:1
  • Files: ITRD, TRIS
  • Created Date: Mar 31 1991 12:00AM