Safety Effects of Horizontal Curve and Grade Combinations on Rural Two-Lane Highways

Details

• Creators:
  Bauer, Karin M. ; Harwood, Douglas W.
• Corporate Creators:
  United States. Federal Highway Administration
• Contributors:
  Fees, Chris A ; Tan, Carol ; Eigen, Ana Maria
• Corporate Contributors:
  Turner-Fairbank Highway Research Center
• Subject/TRT Terms:
  • Highway curves
  • Rural highways
  • Two lane highways
  • Highway safety
• Publication/ Report Number:
  FHWA-HRT-13-078
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  United States. Federal Highway Administration
• Abstract:
  The safety effects of horizontal curves and grades on rural two-lane highways have been quantified in the American Association of State Highway and Transportation Officials (AASHTO) Highway Safety Manual (HSM), but it was not previously known whether and how the safety performance of horizontal curves and grades interact. Furthermore, there are no established safety effects for crest and sag vertical curves, and it is unknown whether and how the safety performance of crest or sag vertical curves is affected by the presence of horizontal curves. ; The objective of this study was to quantify the combined safety effects of horizontal curves and grade combinations and express the results as crash modification factors (CMFs) that can be considered for use in the AASHTO HSM.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/41748/dot_41748_DS1.pdf
• File Type:
  [PDF - 2.25 MB]
• Collection(s):
  Federal Highway Administration
• Main Document Checksum:
  urn:sha-512:c1f2abea23382ad9ab4a1db7e453e7332bac13141f019c492e497ec3ed30319491fec7d8d4877c34deed6edf28e31bfc291d34c840c3ff654616b3b0cab84a42