Highway-Railway At-Grade Crossings: Long-Term Settlement Measurements and Assessments

The purpose of this research was to evaluate the long-term settlements for a wide variety of at-grade crossings. Twenty-four highway crossings were monitored to determine the effects of enhanced support on minimizing long-term settlements of the crossing surfaces. Settlements of the rail and highway approaches to the crossing areas were compared to settlements of the common crossing areas over an average service period of three years. Long-term settlements of crossings with traditional all-granular support materials were compared to crossings with enhanced support. The enhanced support was provided by substituting a layer of asphalt (termed underlayment) for the all-granular subballast layer. The trackbed crossings underlain with asphalt settled 41% of the amount for the all-granular supported trackbed crossings. In addition, the crossing areas underlain with asphalt settled 44% of the abutting all-granular supported track approaches. The statistical t-test validated the significance of the differential findings. Settlements of the all-granular track approaches to the crossings were statistically similar to each other and to the settlements of the all-granular crossing areas.

  • 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:
    • Rose, Jerry G
    • Swiderski, Mary G
    • Anderson, Justin S
    • Walker, Lindsay A
  • Publication Date: 2009-5


  • English

Media Info

  • Media Type: Web
  • Edition: Final Report
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 111p

Subject/Index Terms

Filing Info

  • Accession Number: 01153269
  • Record Type: Publication
  • Report/Paper Numbers: KTC-09-06/FR 136-04-3F
  • Contract Numbers: FRT 136
  • Created Date: Mar 26 2010 1:06PM