I remember the Crouch column (actually, I think it was Couch, but will check), and yes, we can put that on the site. The Melvina question rings no bells. I have the entire archive, though, so will take a look.
Because the right-of-way is still a dedicated public street.
Chicago has lots of streets that can’t be driven, because they’re “closed to vehicular traffic,” occupied by railroads, or were never actually “improved” with any sort of paving (lots of these around Lake Calumet). One of the most interesting is a few feet away from your Melvina sign. The houses facing “Indian Road” front onto a sidewalk only. There’s no street, though I’m pretty sure there was at one point.
If anyone’s interested, I just realized there’s a little more data on Melvina. I’ve posted a clip from a 1938 aerial photo on my flickr account devon ave. whelan pool. 1938-11-24 0bwq07046 | From the site… | Flickr. Pre-water park Whelan Pool is the cross-shaped feature in the upper right.