Aging road user studies of intersection safety.
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Aging road user studies of intersection safety.

Filetype[PDF-4.75 MB]


English
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Details:

  • Creators:
  • Corporate Creators:
    Florida State University. Dept. of Psychology
  • Subject/TRT Terms:
  • Publication/ Report Number:
    BDV30 TWO 977-04
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Florida
  • Corporate Publisher:
    Florida. Dept. of Transportation
  • Abstract:
    Task 1.1 assessed younger (21-35 years), middle-aged (50-64 years), and older (65+) drivers’ ability to

    quickly perceive the presence of marked/unmarked crosswalks and pedestrians within them in computer-based

    laboratory tasks that recorded response times and eye movements. There was an advantage for special emphasis

    markings in that they were detected more quickly and accurately compared to standard markings. However, there

    was no evidence that markings improved or reduced pedestrian conspicuity. In Task 1.2, pedestrians were

    observed at two signalized intersections (Monroe and Georgia, Monroe and Carolina) in Tallahassee to observe

    the effect of different crosswalk markings on pedestrian behavior. Special emphasis markings did not induce more

    pedestrians to cross at signalized crosswalk locations compared to crossing midblock at an unmarked location. A

    simulator experiment (Task 1.3) found that different crosswalk markings had no impact on driver behavior. Task

    2.1 and Task 2.2 examined younger and older adults’ perception-reaction times to yellow traffic signals in a driving

    situation. In Task 2.1, modeling was used to estimate this value for younger and older adults, while Task 2.2

    provided this value through a driving simulator task. Both revealed that older adults needed substantially more

    time to react to a yellow signal compared to younger adults (Modeling: 767ms, Simulator Study: 803ms). Task 3.1

    reviewed the Flashing Yellow Arrow (FYA) literature and suggested a need for further study, especially with older

    adults, and with respect to the effectiveness of FYA educational materials. A lab study (Task 3.2) found that

    participants of all ages infrequently misunderstood the meaning of a FYA signal in a way that would result in a

    crash. However, a simulator study (Task 3.3) found that behavioral measure of comprehension were higher for

    participants exposed to FDOT’s FYA tip card. Recommendations for the implementation of each of these

    countermeasures are discussed.

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