Your car has driver-assistance features. What must you still be prepared to do?
Correct answer: Control the vehicle yourself if a feature fails or is unavailable.
Assistance technology does not replace the driver. Understand its limits and remain ready to operate the vehicle safely without it.
Source: Iowa Driver's Manual, MM1170 07/23/2026; printed page 26, physical PDF page 26; Advanced driver assistance systems. Readable text only; no diagram interpretation used. ↗
Your vehicle has forward-collision warning but no automatic emergency braking. An alert sounds. What should you do?
Correct answer: Assess the hazard and take the necessary braking or avoidance action.
A warning-only system alerts the driver; it does not itself brake the vehicle. Know which functions your own vehicle actually provides.
Source: Iowa Driver's Manual, MM1170 07/23/2026; printed page 30, physical PDF page 30; Forward collision warning. Readable text only; no diagram interpretation used. ↗
Mud or snow covers a sensor used by your assistance system. What should you do?
Correct answer: Clean it as directed and do not rely on the system to detect every hazard.
Obstructed sensors can limit assistance features. Follow the owner’s instructions and keep checking the surroundings yourself.
Source: Iowa Driver's Manual, MM1170 07/23/2026; printed page 29, physical PDF page 29; Driver assistance systems. Readable text only; no diagram interpretation used. ↗
For a beginning driver in normal conditions, what minimum following interval does the Iowa manual recommend?
Correct answer: At least three seconds.
The manual recommends at least three seconds for beginners in normal conditions. Increase the margin when speed, visibility or traction calls for more room; this is guidance, not a universal legal minimum.
Source: Iowa Driver's Manual, MM1170 07/23/2026; printed page 41, physical PDF page 41; Safe following distance. Readable text only; no diagram interpretation used. ↗
A large vehicle ahead blocks your view of the road. How should you change your following gap?
Correct answer: Increase it so you have more room and time to respond.
A blocked view makes developing hazards harder to see. The manual calls for additional following space rather than relying only on the vehicle ahead.
Source: Iowa Driver's Manual, MM1170 07/23/2026; printed page 41, physical PDF page 41; Safe following distance. Readable text only; no diagram interpretation used. ↗
What makes up total stopping distance after a driver notices a hazard?
Correct answer: The distance traveled while reacting plus the distance needed to brake.
You travel before the brakes begin slowing the car as well as during braking. Speed, road surface, tires and attention affect the space needed.
Source: Iowa Driver's Manual, MM1170 07/23/2026; printed page 40, physical PDF page 40; Braking and stopping. Readable text only; no diagram interpretation used. ↗
You have been watching only the rear bumper of the car ahead. What would improve your hazard detection?
Correct answer: Scan farther ahead and around the roadway while also monitoring nearby traffic.
Defensive driving requires a broad search for developing hazards. Looking beyond the nearest vehicle gives more time to plan.
Source: Iowa Driver's Manual, MM1170 07/23/2026; printed page 47, physical PDF page 47; Defensive driving. Readable text only; no diagram interpretation used. ↗
A driver is following too closely. What is the safest response when an opportunity develops?
Correct answer: Allow the driver to pass safely and keep your own actions predictable.
Avoid escalating a tailgating conflict. Let the driver go by safely rather than brake-checking or speeding.
Source: Iowa Driver's Manual, MM1170 07/23/2026; printed page 48, physical PDF page 48; Tailgaters. Readable text only; no diagram interpretation used. ↗
Another driver makes an angry gesture after a traffic disagreement. What should you do?
Correct answer: Avoid engaging and create safe separation.
Do not turn a mistake or disagreement into a confrontation. Maintain control, avoid retaliation and separate when safe.
Source: Iowa Driver's Manual, MM1170 07/23/2026; printed page 47, physical PDF page 47; Aggressive drivers. Readable text only; no diagram interpretation used. ↗
A driver begins moving into your occupied lane without noticing you. What is an appropriate use of your horn?
Correct answer: Give a warning to help prevent the immediate conflict.
The horn is a warning device. Use it to alert someone to danger, not to express anger or replace a safe evasive response.
Source: Iowa Driver's Manual, MM1170 07/23/2026; printed page 49, physical PDF page 49; Communicating with other drivers. Readable text only; no diagram interpretation used. ↗
You cannot remember the last few miles and have begun drifting toward the rumble strip. What should you do?
Correct answer: Find a safe place to stop and rest or change drivers.
Poor recall, repeated yawning and lane drifting are fatigue warnings. Stop safely and address the fatigue instead of relying on stimulation.
Source: Iowa Driver's Manual, MM1170 07/23/2026; printed page 37, physical PDF page 37; Drowsy driving. Readable text only; no diagram interpretation used. ↗
Your eyes are on the road, but an intense conversation absorbs your attention. Why is this still risky?
Correct answer: It can take mental attention away from driving even without looking away.
Distraction can be cognitive as well as visual or manual. A driver may look toward the roadway without effectively processing it.
Source: Iowa Driver's Manual, MM1170 07/23/2026; printed page 36, physical PDF page 36; Eliminating distractions. Readable text only; no diagram interpretation used. ↗
Your car has functioning four-wheel ABS. During an emergency stop, the brake pedal pulses. What should you do?
Correct answer: Keep firm pressure on the brake pedal while steering as needed.
Pulsing can be normal ABS operation. Keep pressing the service brake; repeatedly releasing it interrupts the system’s ability to help you stop.
Source: Iowa Driver's Manual, MM1170 07/23/2026; printed page 41, physical PDF page 41; ABS — antilock braking system. Readable text only; no diagram interpretation used. ↗
Heavy rain begins and water collects on the road. What is a safer adjustment?
Correct answer: Reduce speed, increase space, and avoid abrupt inputs.
Water reduces tire grip and can cause hydroplaning. Lower speed, more room and smooth control reduce the risk of losing traction.
Source: Iowa Driver's Manual, MM1170 07/23/2026; printed page 60, physical PDF page 60; Wet or slippery roads. Readable text only; no diagram interpretation used. ↗
Dense fog reduces your view. Which headlight setting is appropriate?
Correct answer: Low beams, with speed reduced to fit visibility.
High beams reflect back from fog and can worsen glare. Use low beams, slow down, and leave additional room.
Source: Iowa Driver's Manual, MM1170 07/23/2026; printed page 60, physical PDF page 60; Driving in fog. Readable text only; no diagram interpretation used. ↗
Water covers a road and you cannot tell how deep it is or whether the pavement is intact. What should you do?
Correct answer: Turn around and use another safe route.
Do not drive into floodwater. Depth, current and washed-out pavement may be impossible to judge from the driver’s seat.
Source: Iowa Driver's Manual, MM1170 07/23/2026; printed page 60, physical PDF page 60; Flooded roads. Readable text only; no diagram interpretation used. ↗
The surrounding pavement looks wet on a freezing morning. Why should you be especially cautious on the bridge ahead?
Correct answer: A bridge can freeze before the adjoining roadway.
Bridges lose heat readily and may ice before nearby pavement. Reduce speed and avoid sudden braking or steering.
Source: Iowa Driver's Manual, MM1170 07/23/2026; printed page 61, physical PDF page 61; Winter driving. Readable text only; no diagram interpretation used. ↗
Snow or heavy rain makes traction uncertain. What should you do with cruise control?
Correct answer: Leave it off and manage speed yourself for the conditions.
The manual advises against cruise control in bad weather. Direct, smooth speed control is important when traction changes.
Source: Iowa Driver's Manual, MM1170 07/23/2026; printed page 59, physical PDF page 59; Weather conditions. Readable text only; no diagram interpretation used. ↗
A snowplow ahead creates a cloud that hides the road and its equipment. What should you do?
Correct answer: Stay well back until you have clear visibility and a safe opportunity.
Snowplows have limited visibility and equipment wider than the visible vehicle. Do not drive into the snow cloud or attempt a shoulder pass.
Source: Iowa Driver's Manual, MM1170 07/23/2026; printed page 61, physical PDF page 61; Sharing the road with snowplows. Readable text only; no diagram interpretation used. ↗
You leave a paved road and enter loose gravel. What should you change?
Correct answer: Slow down and make steering, acceleration and braking smoother.
Loose gravel reduces traction and can make abrupt inputs destabilize the vehicle. Slow down and allow more control margin.
Source: Iowa Driver's Manual, MM1170 07/23/2026; printed page 55, physical PDF page 55; Rural roads — gravel. Readable text only; no diagram interpretation used. ↗
