REGO PARK, Queens - Long Island Rail Road (LIRR) track repairs have made it a difficult week for commuters.

An empty train derailed Monday Night in Rego Park, Queens, damaging nearly three-quarters of a mile of track, third rail and concrete ties. The Federal Railroad Administration (FRA) is assisting the LIRR in investigating the cause of the derailment.

Chief Engineer Kevin Tomlinson says the LIRR is doing most of its repairs during the less busy late night and midday hours. To speed up work, the LIRR leased a track renewal system train, which automatically puts down new concrete ties and lifts up the old ones.

The LIRR says it does not expect delays or cancellations this weekend. Fully restored rush hour service is expected by Monday morning.