The issue is that no one follows the signs which tell them to not block the intersection. Even a Portland School Bus was blocking the intersection this afternoon.
The solution 1 of 2 have a sign at the point where cars should stop which clearly tells them to stop right here and not block the intersection.
The solution 2 of 2 create a time machine and go back in time to when you were "fixing" the Woodford's Corner area. This time don't buy the street lamp art and instead use that money to hire someone to fix this traffic issue that is Woodford's Corner.