Guidelines for Slope Traversability

One-third of single vehicle run off the road (SVROR) crashes result in rollovers, the leading cause of fatalities in this type of crash. Many of these crashes involve vehicles digging into the ground on embankments or in ditches after encroaching onto the roadside. Additionally, light trucks with a higher centers of gravity, such as sport utility vehicles and pickup trucks are overrepresented in rollover crashes. An increase in the percentage of light trucks in the vehicle fleet demands additional research and updates to the roadside safety guidelines. Work conducted under NCHRP 17-55 included thousands of simulations for various combinations of roadside slope configurations and geometric conditions that represent real-world crash scenarios. The simulations were performed using vehicle models that represented a variety of vehicle classes in today’s vehicle fleet. The results helped to produce the guidance on roadside slope traversability for a variety of roadside conditions. The final report may be found using the following link


  • English


  • Status: Completed
  • Funding: $500000
  • Contract Numbers:


  • Sponsor Organizations:

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001

    American Association of State Highway and Transportation Officials (AASHTO)

    444 North Capitol Street, NW
    Washington, DC  United States  20001

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Performing Organizations:

    Texas Transportation Institute

  • Principal Investigators:

    Sheikh, Nauman

  • Start Date: 20120502
  • Expected Completion Date: 20181115
  • Actual Completion Date: 20181115

Subject/Index Terms

Filing Info

  • Accession Number: 01724270
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: 17-55
  • Files: TRB, RiP
  • Created Date: Dec 2 2019 3:07PM