the crushed stones ballast alongside rail track hold wooden cross ties place which turn lock

navigate by keyword : alongside background ballast construction cross crushed engineering gravel hold line lock metal outdoor place rail railroad railway rusty sharp steel stone stones ties track train transport transportation travel wooden

The crushed stones or ballast alongside the rail track hold the wooden cross ties in place, which in turn lock the i

The crushed stones or ballast alongside the rail track hold the wooden cross ties in place, which in turn lock the rail in place due to their sharp edges.