EVALUATION OF TRUCK ESCAPE RAMPS

Out-of-control vehicles on steep grades have the potential for and frequently do result in severe accidents. There are two truck escape ramps in Kentucky, and both were constructed as a result of severe accidents and the potential for additional accidents. One escape ramp is on the Hyden Spur (KY 118) in Leslie County. Because of geometric conditions of the highway and topographic constraints, an arrester-type escape ramp was designed with pea gravel as the arrester material. The beginning of the ramp is a 386-foot paved section on an 8-percent downgrade; followed by a gravel bed 520 feet long on a 4-percent downgrade. This ramp was opened for use in 1980, and it has been used four times in emergency situations. The other escape ramp is on KY 11 leading into Beattyville in Lee County and is a combination gravity and arrester design. The ramp includes a 400-foot paved approach, followed by a 700-foot arrester bed over a 1.5-percent downgrade and then a 210-foot arrester bed over a 14-percent upgrade. There has been only one reported emergency usage of this ramp since it opened in 1980. Overall, the escape ramps have proven to be operating properly and appear to be performing as they were designed. Of the five cases where the ramps were used by out-of- control vehicles, no one has been injured and there has been very little damage to the vehicles involved. (Author) (Author)

  • Record URL:
  • Corporate Authors:

    University of Kentucky, Lexington

    Kentucky Transportation Center
    College of Engineering, 176 Raymond Building
    Lexington, KY  United States  40506-0281

    Kentucky Transportation Cabinet

    200 Mero Street
    Frankfort, KY  United States  40622

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Pigman, J G
    • Agent, K R
  • Publication Date: 1985-1

Media Info

  • Features: Figures;
  • Pagination: 29 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00399289
  • Record Type: Publication
  • Report/Paper Numbers: UKTRP-85-3
  • Files: TRIS, ATRI, USDOT, STATEDOT
  • Created Date: Mar 31 1987 12:00AM