February 1:  Penn Central RR is formed by the merger of the New York Central System and the Pennsylvania RR.   [MDOT]

July 18:  The Manistique & Lake Superior RR is abandoned.   [MDOT/AATHA-F/1990]

July 18:  The Ann Arbor RR abandons its car ferry route between Frankfort and Manistique.  [HH/MIHX8] 

August 21:  The Calumet and Hecla Consolidated Copper Company closes operations in Calumet, following a strike which closed the mine permanently.  [MSL]

The Penn Central abandons the remainder of its old Lansing Branch, from Albion to Springport, 10.5 miles in length.  Only a small stub is left in Albion to service industry on the north side of town.  [MRC-5/1981]

"ACI" labels (automatic car identification) are mandated by the AAR to be installed no later than 1970.  [SAM]