Thanks, Gents! I drove on M46 Wednesday on the way to Frankenmuth coming from the east. Must have crossed railroad tracks at least four times. I'm guessing most if not all of the trackage in the area is Huron and Eastern, ex-C&O.

I found out the hard way you can't get on SB I-75 at Miller Road, and ended up going down to Van Slyke by what I think is GM's truck plant. There was an eastbounder sitting there staring at the yellow bulb.