CONCEPT DESIGN AND ANALYSIS OF NEBRASKA TURNED-DOWN APPROACH TERMINAL SECTIONS

Turned-down terminal sections were analyzed using LS-DYNA3D, a finite element modelling package with capabilities for simulating vehicular impacts into roadside hazards. A baseline simulation was conducted on the existing turned-down approach terminal section, as well as on various retrofit options. The simulation package was used to select the two most promising options. Six low speed bogie tests and one high speed bogie test were conducted on the modified Nebraska Turned-Down Approach Terminal Sections. All tests were conducted with a 1979 Honda Civic with a gross static weight of 885 kg (1945 lb). Impact conditions were at 0 deg with a 36-cm (15-in.) offset toward the roadway. The low-speed tests were conducted at 16 kph (10 mph), and the high-speed test was conducted at 96 kph (59.5 mph). The high-speed test was conducted and reported in accordance with the requirements specified in the "Recommended Procedures for the Safety Performance Evaluation of Highway Appurtenances", National Cooperative Highway Research Program (NCHRP) Report No. 230. The safety performance of the modified Nebraska Turned-Down Approach Terminal Section was determined to be unacceptable according to the NCHRP 230 criteria. However, the desired behavior of the turned-down section was achieved. It is believed, that revising the post installation procedures could create a terminal section that would perform satisfactorily.

  • Supplemental Notes:
    • Sponsored by the Midwest States Regional Pooled Fund - Fiscal Year 1994. Project Number: HPR-3(017).
  • Corporate Authors:

    University of Nebraska, Lincoln

    Midwest Roadside Safety Facility
    2200 Vine Street, Whittier Building
    Lincoln, NE  United States  68583-0853

    Nebraska Department of Roads

    1500 Highway 2, P.O. Box 94759
    Lincoln, NE  United States  68509
  • Authors:
    • Paulsen, G W
    • Reid, J D
    • Faller, R K
    • Sicking, D L
  • Publication Date: 1995-1

Language

  • English

Media Info

  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 87 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00675368
  • Record Type: Publication
  • Report/Paper Numbers: TRP-03-45-95
  • Files: TRIS, STATEDOT
  • Created Date: Mar 24 1995 12:00AM