摘要: |
The ballast fouling phenomenon is a difficult issue to address. Currently no standard exists by which to measure the severity of ballast fouling. Though several studies have attempted to create some metric for in situ evaluation of ballast material, all methods require invasive laboratory testing. The U.S. rail industry does not indicate that any ballast fouling standard will be adopted in the foreseeable future. As such, addressing ballast fouling is left to each individual railroad or site manager. |