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:
  Asphalt Grade Crossing Surfaces Inspection Railroad Grade Crossings Service Life Subballast
• 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.
  
  
• Format:
  PDF
• Funding:
  KYSPR 13-452
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:ddd361de796d9fe70c8f2cd62e66edee13f25beee884c5aaf4759873719e876a
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28585/dot_28585_DS1.pdf
• File Type:
  [PDF - 23.80 MB ]