More cities should have lighted street signs...
Having missed a turn last night while biking when it was quite dark. Of course, it turned out that the street, a major avenue, didn't have any signs posted for the New Jersey Avenue part of the road network at that particular intersection in the "Capital Riverfront" district.
New signs lighting the way on suburban streets."
Many cities/counties put lighted signs on their major arterials, but they "hang over the street" being affixed to traffic signal crossarms ("More lighted street signs coming to Chesapeake intersections," Norfolk Virginian-Pilot; "Street signs light up at dusk," Washington Post).
Denser cities don't typically place traffic signals across lanes of traffic in the same way as suburban counties.
But that doesn't mean that cities shouldn't think about having lighted street signs in major districts that experience a great deal of night time activity ("Marking roads for better safety," Public Roads Magazine).
The Partnership discusses the attention it pays to elements of the streetscape on a dedicated webpage.