Hump crossings or high-profile crossings are a highway/rail intersection at which the road surface profile across the rail tracks may pose a risk to a low-clearance vehicle becoming stuck on the tracks. They may also pose a threat to heavy vehicles that are required to stop at the crossings due to the steep grades. States are required to identify high-profile crossings, sign them appropriately, and keep their information in an electronic database. In 1997, the Federal Highway Administration (FHWA) adopted a new advance symbol sign for crossings. However, there is no standard procedure from FHWA on how to identify such crossings. The Kansas Department of Transportation maintains an electronic database of about 7,000 public grade crossings. In 2000, they added the value of the grade to the crossing. The objective was to develop an effective process to identify and rank crossings where there may be a problem with the approach grade profiles. This identification includes some physical characteristics of the highway/rail crossing and a centerline and edge-of-road profile of the approaches. It identifies characteristics of "critical" vehicles that are susceptible to being hung-up on these Kansas crossings. Also, it develops "critical" profiles for one or more critical vehicles. Developing a methodology for hump crossing identification included establishing a project advisory committee, evaluating the existing HANGUP computer program, conducting a survey of Kansas counties and other states, developing a physical vehicle model, and creating a protocol for identification of hump crossings with hang-up potential in the field. The study is limited to hump crossing information and does not cover countermeasures.


  • English

Media Info

  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 92 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00964838
  • Record Type: Publication
  • Report/Paper Numbers: K-TRAN: KSU-99-1,, Final Report
  • Contract Numbers: C1087
  • Created Date: Oct 9 2003 12:00AM