NEW YORK - Amtrak may reroute some of its trains from Penn Station to Grand Central this summer.

The move would free up track space for Long Island Rail Road and New Jersey Transit as Amtrak does critical repairs at Penn Station.

Amtrak plans to do weekday track work over a pair of stretches in July and August as it looks to speed up the renovations.

The work follows a string of recent delays and cancellations at Penn, and two train derailments over the past few months.