All cities have vestiges, things that once made sense but over time became obsolete, yet still remain. In my former house I had a small door and nook near the main door where milkmen would once leave milk. Across Toronto you can still see coal doors at basement level, where coal delivery people would shovel in the coal for the coal furnaces.
Elsewhere, here is a great story about taxi signs across New York City that were once used to hail a cab if you needed one. In the days of Uber and Lyft apps, these seem quaint. Just like those apps will seem years from now. Great story, though.
I love the blog that story comes from. It’s full of odd bits of New York, written with love. Well worth diving into.