The 2019 derailment near Speonk disrupted travel to the South Fork on a Saturday morning on Memorial Day weekend.

The crash saw a passenger train collide with a stationary ... green signals to display on the main line if the track is set for the loop. "Signal interlocking is supposed to be failsafe and ...

However, Amtrak continued to deal with logistic issues related to trains ... single track or on two of the four main tracks — all, so maintenance crews could address power-related signal outages.