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A strategy to reduce older driver injuries at intersections using more accommodating roundabout design practices.

Dominique Lord1, Ida van Schalkwyk, Susan Chrysler

  • 1Zachry Department of Civil Engineering, Texas A&M University, TAMU 3136 College Station, TX 77843-3136, United States. d-lord@tamu.edu <d-lord@tamu.edu>

Accident; Analysis and Prevention
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Summary

This study found that older drivers need better path guidance at modern roundabouts to feel safer and more confident. Improved signage and treatments are recommended to encourage elderly drivers

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Area of Science:

  • Traffic Safety and Engineering
  • Human Factors in Transportation
  • Gerontology and Aging Studies

Background:

  • Modern roundabouts offer safety benefits over conventional intersections by reducing severe crashes and vehicle speeds.
  • Elderly drivers are a vulnerable population group with specific needs for navigating complex traffic environments.
  • Safe negotiation of intersections is critical for maintaining mobility and independence in older adults.

Purpose of the Study:

  • To investigate strategies for enhancing the safety, comfort, and confidence of elderly drivers using modern roundabouts.
  • To develop and evaluate countermeasures specifically for improving senior drivers' roundabout navigation.
  • To encourage greater adoption of modern roundabouts by addressing the needs of older road users.

Main Methods:

  • Laboratory study involving focus groups and structured interviews with older drivers.
  • Utilized edited photographs depicting novel traffic control devices and roundabout designs.
  • Evaluated driver perceptions of comfort, confidence, and safety in response to design modifications.

Main Results:

  • Design elements that enhance path guidance are crucial for improving older drivers' acceptance of roundabouts.
  • Specific countermeasures related to signage and treatments were identified as potentially beneficial.
  • Current roundabout designs may not adequately address the perceptual and navigational needs of senior drivers.

Conclusions:

  • Improvements in advance warning signs, guide signs, yield treatments, directional signs, and exit treatments are recommended.
  • Implementing design modifications can increase older drivers' perceived safety and confidence at roundabouts.
  • Addressing the specific needs of elderly drivers is essential for maximizing the safety benefits of modern roundabouts for all road users.