The PS-2 2600 cu ft covered hopper first entered service in the 1960s. The car was popular for cement and sand service and could still be found in use well into the 2000s. The most common service was cement and sand. Occassionally used as buffer cars in instances were a bulk load was not protected by a bulkhead, for example an uprotected lumber load on flat car would require a buffer car between the load and the locomotive.
oads or in unit trains where cars were loaded from the top yielding clearance issues above the roof.