Choosing A Lane
Traffic lanes are often referred to by number. The left or "fast" lane is called the "Number 1 Lane." The lane to the right of the "Number 1 Lane" is called the "Number 2 Lane," then the "Number 3 Lane,"

Example of numbered traffic lanes


Drive in the lane with the smoothest flow of traffic. If you can choose among three lanes, pick the middle lane for the smoothest driving. To drive faster, pass, or turn left, use the left lane. When you choose to drive slowly or enter or turn off the road, use the right lane.

If there are only two lanes in your direction, pick the right lane for the smoothest driving.

Do not weave in and out of traffic. Stay in one lane as much as possible. Once you start through an intersection, keep going. If you start to make a turn, follow through. Last minute changes may cause collisions. If you miss a turn, continue until you can safely and legally turn around

copied & pasted from tips on driving in america.