automatic block signaling 1
Belt Railway of Chicago 1
Cedar Hill, CT 1
Chicago, IL 1
classification yard 1
Clearing, IL 1
controlled manual block 1
Cos Cob, CT 1
electric interlocking 1
electrification 1
electro-mechanical interlocking 1
Green's Farm, NY 1
Greenwich, CT 1
interlocking 1
Mamaroneck, NY 1
New Haven, CT 1
New York, New Haven & Hartford 1
Rye, NY 1
semaphore signals 1
Springfield, MA 1
Stamford, CT 1
Westport, CT 1
Woodlawn, NY 1

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