MICHIGAN'S INTERLOCKINGS

GRAND TRUNK WESTERN

Holly Subdivision

Now owned by CN.

Double track line between Detroit and Pontiac.


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MILWAUKEE JCT. (Detroit)
Tower listed with New York Central

FORD JCT.
Mechanical interlocking installed 1920's

Former crossing with Detroit Terminal.

ROYAL OAK
Mechanical interlocking installed 1917
Closed mid 1930's

Interlocking at west end of a double track segment.

MAL JCT. (Pontiac)
Mechanical interlocking installed 1903
Replaced with trainman operated interlocking by 1950's

Former crossing and junction with Romeo Subdivision and Jackson Subdivision, abandoned.

HOLLY
Tower listed with Pere Marquette


EARLY CTC INSTALLATIONS

Pontiac-Durand
Installed 1952, control machine in dispatcher's office in Durand