Actually, what is needed here is a sign that people should not block the intersection here, and a left-turn only sign for the left lane of 252 south, just before it goes under the underpass. If people on 252 south wouldn't block the intersection (which is illegal), and wouldn't try to merge from 2 lanes to one while in the intersection , it would be safe to make a legal left turn from Maple Ave onto 252 south.