RRHX - Michigan Railroad History
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Re: NYC passenger train at Oshtemo
The signal looks like the heads are offset, meaning it isn't an absolute signal (interlocking or CP) but an advance block signal that is permissive - i.e. pass red after stopping, but at restricted speed looking out for any obstructions.
This also looks to be Rule 251 territory - signaled in the direction of travel only. This is common for the MCRR line from Chicago to Detroit, and the CASO from there to NY - in double-track territory.
Dan in Oxford