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Effect Of Enhanced Trackbed Support On Railway/Highway At-Grade Crossing Performance, Jerry G. Rose, Brett R. Malloy
Effect Of Enhanced Trackbed Support On Railway/Highway At-Grade Crossing Performance, Jerry G. Rose, Brett R. Malloy
Kentucky Transportation Center Research Report
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 …
Recommendations For Kytc’S Railway/Highway At-Grade Crossing Surface Management Practices, Brett R. Malloy, Jerry G. Rose, Macy L. Purcell
Recommendations For Kytc’S Railway/Highway At-Grade Crossing Surface Management Practices, Brett R. Malloy, Jerry G. Rose, Macy L. Purcell
Kentucky Transportation Center Research Report
An ideal Railway/Highway At-Grade Crossing Management program involves selecting costeffective practices when designing new crossings and rehabilitating existing crossings. This report outlines two strategies to enhance KYTC’s existing program. First, it describes a process that uses decision-option diagrams to optimize the assessment and implementation of engineering solutions in order to restore desired smoothness, minimize settlement in the postconstruction phase, and foster acceptable long-term performance of crossings following their rehabilitation. Decision-option diagrams rely on assessments that are site-specific and based on historical performance, the present observed performance and condition, and the measureable parameters specific to particular crossings. To supplement this process, …