Effect of enhanced trackbed support on railway/highway at-grade crossing performance.

Details

• Creators:
  Rose, Jerry G. ; Malloy, Brett R.
• Corporate Creators:
  University of Kentucky Transportation Center
• Corporate Contributors:
  Kentucky. Transportation Cabinet
• Subject/TRT Terms:
  • Railroad grade crossings
  • Asphalt
  • Grade crossing surfaces
  • Subballast
  • Service life
  • Inspection
• Publication/ Report Number:
  KTC-14-16/SPR452-13-1F
• Resource Type:
  Tech Report
• Geographical Coverage:
  Kentucky
• Corporate Publisher:
  University of Kentucky Transportation Center
• Abstract:
  This report documents the long-term performance of 89 railway/highway at-grade crossings in ; Kentucky and adjacent states that contain asphalt underlayment underneath the ballast. Asphalt ; underlayment increases load carrying capacity for trains and highway vehicles while enhancing ; the support structure’s waterproofing and confinement. The asphalt underlayment crossings ; studied were installed at sites that had historically exhibited poor performance and short service ; lives. Most of the crossing sites evaluated were 10-15 years old; however, their ages ranged up to ; 30 years. All of the crossings investigated have shown excellent performance since the ; installation of asphalt underlayments. No crossing failures, such as excessive settlement or mud ; pumping, have been noted, and the service lives of the crossing surfaces have been significantly ; improved. Detailed results from periodic inspections are included. A literature survey focuses on ; eleven public agencies and railroad companies that implement asphalt underlayments. Most of ; these entities install asphalt underlayments at heavy traffic/tonnage crossings that have routinely ; shown evidence of weak support leading to inferior performance. This survey, along with the ; empirical results of this study, indicates that asphalt underlayment, irrespective of material used ; on crossing surfaces, extends the service life of crossings and improves their performance.
  More +
• Format:
  PDF
• Funding:
  KYSPR 13-452
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28585/dot_28585_DS1.pdf
• File Type:
  [PDF - 23.80 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:ddd361de796d9fe70c8f2cd62e66edee13f25beee884c5aaf4759873719e876a