United States Department of Transportation
i
Identification of Hump Highway/Rail Crossings in Kansas
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2003-07-01
[PDF-2.67 MB]
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TRIS Online Accession Number:00964838
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Edition:Final Report
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Abstract:Hump crossings or high-profile crossings are a highway/rail intersection (HRI) at which the road surface profile across the rail tracks may pose a risk of 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 grages. States are required to identify high-profile crossings, sign them appropriately, and keep the information in an electronic database. In 1997, FHWA adopted a new advance symbol sighn for crossings. However there is no standard procedure from FHWA on how to identify such crossings. The objective of this study was to develop an effective process to identify and rank crossings where there may be a problem with the approach grade profiles. This identifications includes some physical characteristics of the highway/rail crossing and a centerline and edge-of-road profile of the approaches. It identifies characteristics "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. This study is limited to hump crossing information and does not cover countermeasures. 93 p.
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