Reggie, both those links lead to Joe Williams himself.

Jim, second to last line concerns her 'out at a club on 45' (another M'sippi highway). But the last few words in the song still mysterious, sounds like "see why my doll's alive" but not quite right either.

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I drove U.S. 45 in southeast Wisconsin all the time in my early years.
https://en.wikipedia.org/wiki/U.S._Route_45_in_Wisconsin
-Joe Offer-