Lane Use, Turns, and Passing
What this domain covers
Lane use, turns, and passing questions test whether you can choose the correct lane, signal your intention early enough, and complete a turn or pass without crowding other traffic. Missouri expects drivers to keep right except when passing or preparing for a left turn, and to obey pavement markings and signs over general rules.
Lane use and turns
Drive on the right half of the roadway. On a multi-lane road, use the lane that matches your destination; do not weave. Signal at least 100 feet before a turn or lane change. For a right turn, approach close to the right curb or edge and turn into the rightmost lane. For a left turn from a two-way street, begin in the left lane nearest the center line and turn into the first available legal lane. Use a designated turn lane only for turning. Do not make a U-turn where signs prohibit it, on a curve, or near a hillcrest where you cannot see approaching traffic.
Passing
Pass on the left. You may pass on the right only when the vehicle ahead is making a left turn and there is room to pass safely on the right. Do not pass on the shoulder, in a no-passing zone, or when a solid yellow line is on your side. Before passing, check mirrors and blind spots, signal, and return only when you can see the passed vehicle in your mirror. Never exceed the speed limit to pass.
Worked example
A car ahead slows and signals left on a two-lane road. The reasoning: you may pass on the right only if the car is turning left and there is a clear, paved lane or space on the right; on a narrow two-lane road with no room, you must wait. Passing on the shoulder is not a legal workaround.
Traps
Signaling after starting the turn; turning wide into the wrong lane; treating a center turn lane as a travel lane; and passing when a solid yellow line is on your side. Also, a green light does not make an unsafe left turn legal-you still yield to oncoming traffic.