Are there actual BL signs northbound after downtown? Or only to I-25 signs?
That's standard Wyoming practice when the business loop is ~1/2 over or so, all signage changes from BL I _ to TO I _ (yes it kinda makes this hard).
Sure, but that doesn't mean every to I-25 sign is a sign for the business loop. Hart Street is the best route from the north end of downtown to I-25, whether or not it's BL 25. We should only look at southbound signage on the north half, and the majority of that (as well as official sources) takes it to exit 56A.
My preference is to move it, I just wanted to put it forward first before making that change in case anyone had any other ideas. And it's signed as a loop, not a spur, so cutting it off downtown wouldn't make sense.
The BL 90 junction is north of downtown, and since I-25 ends at I-90, a loop could end at BL 90.
Anyway, I agree that exit 56A makes the most sense.