IA DMV Cheat Sheet 2026

The 30 highest-yield IA DMV facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. In Iowa, when is it legal to pass another vehicle on the right? → When the vehicle ahead is turning left and there is a clear lane to the right
2. What does a solid yellow centerline on your side of the road mean? → Passing is prohibited for you
3. If you refuse to take a chemical test when requested by law enforcement in Iowa, your driver's license will be revoked for: → 1 year
4. In Iowa, what should you do when approaching a hill crest with limited visibility? → Reduce speed and stay in your lane, prepared to stop if needed
5. What is the proper way to use your turn signal when changing lanes? → Signal continuously for at least 100 feet before changing lanes
6. In Iowa, when is it legal to use a cell phone while driving? → Only if you are using a hands-free device
7. In Iowa, what is the proper procedure when you encounter a roundabout? → Yield to traffic already in the roundabout, enter when safe, and travel counterclockwise
8. What document must Iowa drivers carry in their vehicle as proof of insurance? → An insurance card or electronic proof of insurance on a mobile device
9. What action should be taken if a vehicle's title is lost or damaged? → Apply for a duplicate title through the Iowa Department of Transportation
10. When driving in heavy fog in Iowa, what should you use instead of high-beam headlights? → Low beams or fog lights
11. In Iowa, what is the proper action when your vehicle starts to skid on ice? → Ease off the gas and steer in the direction you want to go
12. What documents are generally required to apply for an Iowa driver's license? → Proof of residency, Social Security number, and identity
13. What should you do if you miss your exit on an Iowa interstate? → Continue to the next exit and turn around
14. What is the primary purpose of the vision test when applying for an Iowa driver’s license? → To determine if you need corrective lenses
15. How should you handle a blowout at highway speed in Iowa? → Grip the wheel firmly, ease off the gas, and steer straight
16. In Iowa, when must you notify the DOT of an address change? → Within 30 days of the change
17. What does a white diamond symbol painted on the road indicate in Iowa? → Reserved lane for high-occupancy vehicles, buses, or bicycles
18. What does the Iowa written knowledge test for a driver’s license typically cover? → Road signs, traffic laws, and safe driving practices
19. What is the recommended following distance behind another vehicle in ideal driving conditions? → 3 seconds
20. How often must vehicles be registered in Iowa? → Annually
21. When passing a bicycle on an Iowa road, what is the minimum safe distance? → At least 3 feet of clearance
22. On an Iowa expressway, which lane should you use for normal driving (not passing)? → The rightmost lane
23. In Iowa, when must you use your turn signal? → At least 100 feet before turning or changing lanes
24. What is Iowa's implied consent law? → By operating a motor vehicle in Iowa, you consent to chemical testing if suspected of OWI
25. When merging onto an Iowa interstate highway, what is the correct technique? → Use the acceleration lane to match the speed of traffic, then merge smoothly
26. What does a circular yellow sign with a black X and RR mean? → Railroad crossing warning ahead
27. What should you do if you need to transfer the title of a vehicle you are selling in Iowa? → Provide the buyer with a signed title and a bill of sale
28. When must you turn on your headlights in Iowa according to state law? → From sunset to sunrise and any time visibility is less than 500 feet
29. What does a rectangular orange sign indicate on Iowa roads? → Construction or work zone warning
30. What should an Iowa driver do when approaching a school bus with flashing amber lights? → Prepare to stop as the bus is about to stop and load or unload children