MASSACHUSETTS:	AMTK	Amtrak-National Railroad Passenger Corp.
	BCLR	Bay Colony Railroad Corporation
	CSO	Connecticut Southern Railroad
	CSXT	CSX Transportation Inc.
	GU	Grafton and Upton Railroad Company
	GMRC	Green Mountain Railroad Corporation
	HRRC	Housatonic Railroad Co., Inc.
	MCER	Massachusetts Central Railroad Corp.
	NECR	New England Central Railroad, Inc.
	NS	Norfolk Southern Railway Co.
	PVRR	Pioneer Valley Railroad Co.
	PW	Providence & Worcester Railroad Co.
	ST	ST Rail System
	CN	Canadian National Railways
	CPRS	Canadian Pacific Railway