NEW YORK CITY (WABC) -- Amtrak is about to begin massive repairs on two of the four East River train tunnels that were heavily damaged by Superstorm Sandy 12 years ago. It's a one-at-a-time process that will take 3 years. The worry is the delays on the Long Island Rail Road.

The Long Island Rail Road is warning riders to prepare for possible service disruptions next week when Amtrak starts repairing the East River Tunnels.

Amtrak is days away from a $1.6 billion project to repair the East River Tunnels hundreds of feet below the surface. CBS News New York's Elijah Westbrook reports.