I think we're running into the Wouldn't Touch It With A 10 Foot Pole problem that often arises in situations having to do with direction in san francisco. You need someone who's done the exact route to vouch for it, otherwise all bets are off.

The left turn is the only thing you really need to worry about. Legal left turns in san francisco are very rare, so just realize you may find yourself in a three right turn situation.

Matthew