Originally Posted by Idle
It is legal in California and Arizona, and likely always has been legal.
Many major surface streets have center lanes that can be used by traffic in either direction to make left turns. A two-way left turn center lane is marked by double parallel yellow lines, with the exterior lines solid and the interior dashed on each side. If a street has a center left turn lane, you may enter and use it to enter or exit a driveway or private road, when preparing for or making a left turn, or when preparing for or making a U-turn if permitted. If exiting a driveway or private road, you may use this lane to merge. You may not drive more than 200 feet in the center left turn lane. You may drive across a center left turn lane if needed.
Exactly. That's the way we do it here as well. I'm a bit surprised that it seems to be difficult to understand.