Many roads have two or more lanes going in your direction. On these roads, drivers traveling at slower speeds should use the right lane, as the speed of traffic increases as you move to the left. Be sure you're not impeding other traffic by driving too slowly in your lane, as this can frustrate other drivers or cause them to make unsafe passing maneuvers.
On two-lane roads, the left lane should generally be used only when you're passing a slower car driving in front of you; when the road is crowded and both lanes are in use, don’t use the left lane if you're driving more slowly than traffic. On roads with three or more lanes, make sure you match your speed to the traffic flow in your lane, and be ready to yield to faster moving traffic by moving to the right if necessary.
On multi-lane roads, you should be in the left lane when passing or preparing to turn left, and in the right lane when turning right or preparing to enter or leave the roadway. Avoid passing on the right.
When you change lanes, wait until there is a clear gap in the traffic, look in the mirrors and only after that start the maneuver. Merging requires the same sequence of actions.
Don't drive in a bike lane except when making a turn, entering or leaving an alley, private road or driveway, or when you need to cross the bike lane to park near the curb. Carpool lanes are made specifically for the buses or vehicles with 2 or 3 passengers to decrease the use of fuel, air pollution and lessen the traffic on the road.