Greater than 90% of the time I merge left safely as HH described into the vehicular LTL.
However under certain conditions I will make a right turn, then a u-turn and line up behind vehicular thru traffic. This morning was such a condition as the sun was very low and looking back behind me (with both mirror and turning head) I could not clearly see due to the intense sun/glare. That made it hard to safely negotiate a merge.
One thing I would never do (in addtion to turning left from right position) is go thru, then turn 90deg as this can put one in a sudden dangerous condition as the light changes and there is often not any room ahead of lead car to position oneself.
Al