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ICTD 2025

Transportation Planning

POSTER RECEPTION (View list of posters here)

Assessing Commercial Driveways Safety in the Vicinity of Interchanges: A Study in Florida

Tuesday, June 10, 2025
4:45 PM – 6:00 PM MT
Abstract: Interchanges and commercial driveways are vital components of transportation systems and serve the critical function of managing access between roads and highways and between roads and commercial properties. This study aimed to determine how commercial driveway locations and designs interact with interchange characteristics and influence traffic safety at these locations. The safety assessment of commercial driveways was conducted through crash frequency and crash severity analyses, in which a negative binomial regression model and multinomial logit model were used. The assessment included an examination of 69 interchanges, 832 commercial driveways, and 853 driveway-related crashes in the vicinity of interchanges in Florida. Results revealed several factors significantly influencing the occurrence of commercial driveway crashes in the vicinity of interchanges, including the number of lanes, bike lane type, and 5-year average AADT on connecting streets, right turn lane type, driveway design features, number of driveway lanes, and traffic control at the driveway. Specifically, exclusive right-turn lanes at commercial driveways reduced the average number of driveway-related crashes by 49.7% compared to shared right-turn lanes and 64.0% to no right-turn lanes. The severity of commercial driveway-related crashes was significantly influenced by the distance from the ramp taper to the first unsignalized driveway or signalized commercial driveway, alcohol and drug use, lighting condition, speed limit and bike lane type on connecting streets, and driveway number of lanes. Specifically, unsignalized or signalized commercial driveways less than 500 ft from the end of the interchange ramp taper increased the potential for severe injury crashes by 261%. Additionally, conventional bike lanes significantly increased the risk of minor injury. Overall, the research findings provide insights on addressing safety issues at commercial driveways in the vicinity of interchanges, as well as valuable inputs for future access management guideline improvement.

Learning Objectives:

Attendees can expect to learn the following from this session:
  • Upon completion, participant will be able to learn how commercial driveway locations and designs interact with interchange characteristics
  • Upon completion, participant will be able to understand the influence of commercial driveway and interchange features on crash frequency and severity.
  • Upon completion, participant will be able to obtain insights on commercial driveway access management near interchanges and suggestions for safety improvements.