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IPOD Abstract for presentation (Poster or Podium)

Transportation Safety

1664931 - Applying Tight Corner Radius to Improve Pedestrian Safety at Signalized Intersections

Sunday, June 16, 2024
3:25 PM - 3:50 PM ET
Room: 223
Abstract: The tight right corner radius was initially designed to reduce turning speed and optimize drivers' sight lines for conflicting traffic. A pilot study was conducted at three signalized intersections along an urban principal arterial in Tampa, Florida, to evaluate the effectiveness of the tight turning radius in improving pedestrian safety. The study adopted vehicle-yielding-to-pedestrian behaviors and turning speed as surrogate safety measures. These safety data were retrieved from videos that were recorded before and after the treatment. Statistical comparison of these safety data shows that the yielding-to-pedestrian rate was significantly increased with the treatment, regardless of with or without raised channelization islands, especially during nighttime. The turning speed was also significantly reduced after the treatment, decreasing the risk of severe injury and fatality for a pedestrian hit by a turning vehicle. The results support the safety performance of the tight turning radius in improving pedestrian safety at signalized intersections.

Learning Objectives:

Attendees can expect to learn the following from this session:
  • Describe a new geometric design, the tight corner radii design, at signalized intersections along urban/suburban arterials in Florida.
  • Demonstrate a before-after study based on surrogate safety measures to evaluate the safety effects of the tight corner radii for pedestrians.
  • Deliver the evaluation results that the tight corner radii design tends to increase vehicle yielding to pedestrian behaviors (by 7%) and reduce turning speed (by 2.4 mph to 6.7 mph).