Although you can see it done all the time, it actually is unlawful to drive on the shoulder EXCEPT in emergencies.
When driving on a four lane highway or freeway you should use the right hand land or 'thru lane' except when passing. If the right hand lane is designated for slower traffic or for exiting traffic, you'd use the lane to the left of it.
In Oregon, when it is unpaved, has a bike lane, and you are not trying to pass someone turning left.
right lane
right lane
right lane
The left lane.
Left lane
driving on a two-lane roadway you may pass the vehicle in front you if?
no
If on 2-lane streets, yes. You should not swing into the other lane, but stay in the right before and after turning.
You should always only turn from the lane closest to the direction you wish to turn. For example you will turn only from the far left lane if you are turning to the left. If you wish to turn right then you will have to do this from the far right lane only.
If on 2-lane streets, yes. You should not swing into the other lane, but stay in the right before and after turning.