I'm used to driving around American cities, in which the wayfaring signage for anything beyond the name of the intersecting street, if it exists at all, consists of small signs mounted off to the side; if these signs happened to be blocked by a passing truck, or if you happened to be looking straight ahead at the traffic and didn't look the right way, too bad for you.
What a revelation, then, to visit Seoul and see the wonderfully helpful signs that are mounted overhead in advance of every major intersection:
https://www.google.com/maps/@37.5700...7i13312!8i6656
These signs (all of which are in Korean and English, and some have Chinese as well) tell you at a glance which major areas you can reach by either continuing straight or turning in either direction. They're large and mounted overhead, so they're easy to spot.
I've never seen anything like this in any American city I've ever visited. Does anyone know of any city in this country that has signage like this? And can you think of any reason, aside from cost and possibly aesthetics, why we don't do this?