Turns and Passing Slow-moving vehicles may make wide turns and may turn right or left at anytime into unmarked entrances. When approaching from the rear, stay a safe distance behind the vehicle until it is safe to pass, then be certain the driver has seen you and is aware of your intent to pass before you begin. When lights are required for these slow moving vehicles, a self-luminous red lamp on the rear of the vehicle is normally visible for 500 feet to the rear. Other devices to identify slow-moving vehicles may include slow moving emblem reflectors, as well as rotating or oscillating red or amber lights. You may see this on slow-moving vehicles such as farm tractors, machinery, construction equipment or horse-drawn vehicles. Lane Usage Slower traffic must drive in the right-hand lane. The left lane is for passing and turning. Slow-moving vehicles maybe wider than the lane width. It maybe necessary for these wide vehicles to temporarily move into an adjoining lane to avoid roadside obstructions.