Panels are typically 80

foot

in length and include:

Track panels are particularly useful when replanking an existing at-grade crossing. After the existing rails are cut on both ends, an existing section of track is removed down to the subgrade. After the subgrade, subballast, and ballast are

placed

, the track panels are installed. The track panel is bolted on both ends, and a tamping machine installs ballast. The temporary joint bars are then removed, and the rails are welded together. Crossing surface panels are bolted into the ties.