Metro North Test Train?...Breakneck RidgeTunnel on the Hudson Line. May 30, 1991.

A few trains at Breakneck Ridge Tunnel.. The northbound track was handling all traffic while the southbound track was catering to what seemed to be a Metro North test train with MN FL9 2017. -Southbound Metro North (test train?) pushed by FL9 #2017. -Northbound Amtrak train with FL9 #485. -Southbound Amtrak Lakeshore Ltd. with FL9 #487. -The Northbound return of Metro North train with #2017. Stops. -Northbound Metro North train with FL9 #2015 -The (test train) continues north.