Missouri permit test: passing, highways and work zones
Passing and being passed, slow traffic, controlled-access highways, interchanges and work zones. 14 questions, 10 at a time, starting with ones you haven't seen.
Rules to remember10 key passing, highways and work zones rulesShow the rules
- Missouri allows passing on the right on a one-way street, as well as around a vehicle turning left and on wide multi-lane roads. (p. 24)
- You may not drive on the left side of the road when approaching within 100 feet of, or at, any intersection or railroad grade crossing. (p. 24)
- Do not pass any vehicle in a funeral procession except where a passing lane has been specially provided. (p. 36)
- When being passed, stay in your lane and do not increase your speed. (p. 40)
- If you can't see the truck driver's face in the side mirror, the driver can't see you. (p. 40)
- Use the ramp and acceleration lane to reach the speed of highway traffic, watch for a gap, signal and pull in smoothly. (p. 41)
- Stop on the shoulder only in an emergency, and turn on your emergency flashers. (p. 41)
- If you miss your exit, do not stop, back up, or turn around on the highway. (p. 41)
- In a Diverging Diamond Interchange you travel on the left side of the roadway for a short distance. (p. 42)
- At a flagging operation, be prepared to stop as you approach and follow the flagger's instructions. (p. 55)
Taken from the explanations to checked practice questions; page numbers link to the official handbook.
Sample passing, highways and work zones questions
1.You are passing a large truck. How do you know when it is safe to move back in front of it?
- AWhen you are one car length ahead
- BWhen its cab shows in your mirror
- COnce your bumper clears its front
- DWhen the truck driver flashes lights
Show the answer
✓ B. When its cab shows in your mirror
Passing a truck takes longer. Before moving back in, make sure you can see the truck's cab in your rearview mirror, and don't slow down once in front.
Source: Missouri Driver Guide (Revised August 2026), page 40
2.You are driving through a Diverging Diamond Interchange (DDI). What may surprise you?
- AYou drive on the left side for a bit
- BTrucks are not allowed to use it
- CYou must stop at every ramp
- DThere are no signs to guide you
Show the answer
✓ A. You drive on the left side for a bit
In a Diverging Diamond Interchange you travel on the left side of the roadway for a short distance. Follow the directional signs.
Source: Missouri Driver Guide (Revised August 2026), page 42
3.Your car breaks down on the highway and you stop on the shoulder. What should you do to warn other drivers?
- ATurn on your emergency flashers
- BFlash your high beams at oncoming cars
- CStand in the travel lane waving
- DLeave your lights off to save the battery
Show the answer
✓ A. Turn on your emergency flashers
Stop on the shoulder only in an emergency, and turn on your emergency flashers. Raising the hood or tying a white cloth to the antenna also helps.
Source: Missouri Driver Guide (Revised August 2026), page 41
4.Another vehicle starts to pass you. What should you do?
- AStay in your lane at your speed
- BBrake hard to let them by
- CSpeed up so they can't cut in
- DMove over onto the shoulder
Show the answer
✓ A. Stay in your lane at your speed
When being passed, stay in your lane and do not increase your speed.
Source: Missouri Driver Guide (Revised August 2026), page 40