Virginia has both, the arrow to solid green with a sign indicating traffic may merge on solid green. Then there are the other turning lanes that do go from 2 lanes to 1 lane, but they have the green/yellow/red arrow lights. No sign explicitly saying you can't turn on the red arrow, but I always figured if they put the red arrow there then that meant you couldn't turn without getting a ticket.
Of course, who knows, bureaucracy works in wonderfully convulated and retarded ways. So they could have just spent more money for the green/yellow/red light just for the hell of it.
-SW