What's the safest way to turn left from a right-side bike lane? (United States road configuration and customs here. Sorry, those of you who drive on the left!)

On my trip home, I use a bike lane near the right side of a very busy one-way arterial street; there is a bus/right-turn lane between the bike lane and the curb. I need to turn left, crossing three lanes of traffic, at a T-intersection (no street to the right). My options are:


Turn left directly from the bike lane.
Keeping a weather eye on traffic, move into the left-hand lane and turn from there.
Veer right onto the sidewalk (avoiding buses, obviously); wait for the pedestrian light to cross.


Which of these is the canonically correct way to manage, assuming heavy car traffic?
The Oregon Bicyclists Manual explains this very well, and with good diagrams, so I'm going to pretty much copy them verbatim here:

There are several ways to make a left turn on a bicycle:
As a Vehicle
As you approach the intersection, look over your left shoulder for
traffic  and, when clear, signal your turn, move over to the left side
of the lane  on a two-lane road (1), or into the left lane or the
center turn lane when  available. You should be  positioned so cars
going  straight through can’t pass  you on the left. Yield to oncoming
cars before turning.  if you are riding in a bike  lane, or on a road
with  several lanes, you need to  look and signal each time  you
change lanes. Never make a left turn from the  right side of the
road, even  if you’re in a bike lane.
“Box-style”
Proceed straight through  the intersection on the  right. Then stop,
and either  cross as a pedestrian in  the crosswalk (2), or make  a 90
degree left turn and  proceed as if you were  coming from the right
(3).  If there is a signal, wait for  the green or walk signal  before
crossing. Yield to  pedestrians in crosswalk.


In your particular case, I would suggest method 2. Cross the intersection, then pull off to the side and orient yourself to cross with the crosswalk. Then wait until there's a break in traffic, and head across that way. If you eventually become more comfortable biking in traffic, you may choose to use method 1. I find that cars almost always slow down and let me in if I clearly signal that I'm making a left turn, but it depends on how fast traffic is, how confident of a cyclist you are, and what the road conditions are like.