Idaho ITD Permit Practice Test 18
- Questions40
- Correct to pass34
- Passing score85%
- Minimum age15 years
-
1. Traffic is backed up just past the exit you want to use at a single-lane roundabout. What should you do?
Show answer
Answer D: Wait at the yield line until you can pass through and exit
You must not enter a roundabout unless you can clear it, because stopping inside blocks every other entry.
-
2. An overhead lane-use control signal shows a steady red X above the lane you are traveling in. What does it require?
Show answer
Answer D: Leave that lane, because it is closed to you
A steady red X means road users are not permitted to use the lane beneath it, so you must move into a lane that is open.
-
3. An overhead lane-use control signal shows a steady red X above your lane. What does it mean?
Show answer
Answer B: You may not use that lane and must move out of it
A steady red X means the lane below it is closed to you, while a steady yellow X is the warning to prepare to vacate the lane and a downward green arrow means the lane is open.
-
4. Which effect appears as a drinker's blood alcohol level climbs well past the first drinks?
Show answer
Answer D: Loss of muscle control and steady steering
Higher levels of alcohol reach the parts of the brain that control movement, which shows up as clumsy steering, late braking and poor lane control.
-
5. On a long drive you notice repeated yawning, missed exits and drifting toward the lane line. What should you do?
Show answer
Answer C: Pull off at a safe place and sleep, or change drivers
Those are warning signs that sleepiness is already interfering with driving, and only rest restores alertness. Fresh air, music and caffeine do not reverse it.
-
6. Which of these would appear as a symbol on a blue general service sign?
Show answer
Answer A: A hospital
General service signs cover facilities such as hospitals, fuel, food, lodging, camping, telephones and rest areas, all shown in white on blue.
-
7. A driver moves into the space you were keeping ahead of you. What should you do?
Show answer
Answer D: Ease off and rebuild the gap in front of you
Losing a following gap is common in traffic; the answer is simply to drop back and recreate it rather than drive too close.
-
8. How does Idaho classify text messaging while driving a non-commercial vehicle?
Show answer
Answer C: As an infraction
Idaho makes reading, writing or sending written communication while driving an infraction.
-
9. When is a driver or rider most likely to need hand and arm signals instead of the vehicle turn signal lamps?
Show answer
Answer D: When the lamps have failed or cannot be seen because of glare or a load
Hand and arm signals replace or reinforce the lamps whenever the lamps do not work or cannot be seen clearly by other road users.
-
10. May you park at the curb immediately next to a railroad crossing?
Show answer
Answer A: No, you must leave the crossing and its approach clear
Parking beside a crossing hides the tracks and the signals from approaching drivers and leaves no room for a vehicle that has to clear the rails.
-
11. In plain words, what is understeer?
Show answer
Answer B: The vehicle keeps going straight even though the wheels are turned
Understeer means the front tires have run out of grip, so the vehicle takes a wider line than the one you steered.
-
12. Why is being predictable an important part of driving safely?
Show answer
Answer A: Because other road users are able to plan around what you are doing
Other drivers make their decisions from what they expect you to do, so surprises are what produce collisions.
-
13. On a school speed limit sign, the part carrying the word SCHOOL is shown
Show answer
Answer A: in black on a fluorescent yellow-green background
The SCHOOL portion of the school speed limit sign uses the same fluorescent yellow-green background as school warning signs, while the speed portion keeps the standard regulatory appearance.
-
14. Rain is falling and the outside temperature reads close to 32 degrees Fahrenheit. Why is that dangerous?
Show answer
Answer A: The rain can freeze on contact and glaze the road with ice
Near freezing, rain landing on cold pavement can turn to a glaze of ice almost at once, so a road that looks merely wet may have no grip at all.
-
15. What can an Idaho driver be cited for after failing to give full attention to the safe operation of a vehicle?
Show answer
Answer A: Inattentive driving
Idaho requires drivers to give full attention to safe operation and provides a separate citation, inattentive driving, when they fail to do so.
-
16. A sign at the signal reads LEFT TURN ON GREEN ARROW ONLY. The ball turns green but no arrow appears. What may you do?
Show answer
Answer C: Wait, because your turn is allowed only while the arrow is showing
The sign removes the permissive turn, so the left is legal only during the green arrow and you must wait behind the line until it appears.
-
17. Why should heavy objects in the passenger compartment be secured?
Show answer
Answer A: Because loose objects fly forward in a crash and can injure the people
Anything loose keeps traveling at the speed of the vehicle when the vehicle stops, so it strikes the occupants with great force.
-
18. You are in the acceleration lane and the gap you were aiming for is now beside you. What is the best adjustment?
Show answer
Answer A: Change your speed a little to line up with a gap, then merge smoothly
The acceleration lane is for matching both the speed and the position of a gap, and small speed adjustments are what line the two up.
-
19. You are pulling out of a farm entrance onto a rural highway. What is your obligation?
Show answer
Answer C: Yield to every vehicle already on the highway before you enter the roadway
A driver entering a highway from a private road or driveway yields to every vehicle already on the highway.
-
20. Besides its height, what else matters about a head restraint?
Show answer
Answer C: That it is close to the back of the head, and not far behind it
A restraint that sits far behind the head lets the head snap back before it is caught, so a small gap is important.
-
21. You find yourself in a lane that must turn, you wanted to go straight, and you cannot change lanes safely. What should you do?
Show answer
Answer D: Make the required turn and find another route
Going straight from a mandatory turn lane surprises everyone around you, while a wrong turn costs only a few extra minutes.
-
22. You are waiting to turn left and an oncoming vehicle stopped in the near lane to turn left blocks your view of the far lane. What should you do?
Show answer
Answer A: Wait where you are until you can see that the far lane is completely clear
The lane you cannot see is where the crash comes from, so you hold your position until the view opens up.
-
23. What do the numbers on a pedestrian countdown display show?
Show answer
Answer A: The seconds remaining to finish a crossing already under way
The countdown runs during the pedestrian change interval and shows how many seconds are left before the crossing time ends.
-
24. A driver who is passing you cannot complete the pass because a vehicle is coming. What should you do?
Show answer
Answer C: Ease off the accelerator and make room for them to drop back in
The only place for the passing vehicle to go is the gap behind you, and easing off opens that gap immediately.
-
25. A stop sign at a busy corner has a stop line and a crosswalk, but buildings block your view of the cross street. What is the correct sequence?
Show answer
Answer C: Stop at the line first, then edge forward and stop again to see
The first stop is required at the line or before the crosswalk, and a second stop farther forward is what actually lets you yield safely.
-
26. You are stopped at the yield line of a roundabout when an emergency vehicle comes up behind you with lights and siren. What should you do?
Show answer
Answer A: Stay out of the roundabout and pull over to the right of your lane if there is room
Never enter a roundabout ahead of an emergency vehicle and never stop inside one; wait clear of the entry so the crew can get through.
-
27. A steady green arrow pointing left is displayed for your turning lane. What does it tell you?
Show answer
Answer D: The turn is protected because conflicting traffic is being held
A steady green arrow gives a protected movement in the direction shown, although you still yield to pedestrians and to any vehicle already inside the intersection.
-
28. At a rural intersection a beacon flashes yellow toward the main road and red toward the side road. How is each approach treated?
Show answer
Answer A: The main road slows and proceeds, the side road stops
An intersection control beacon assigns flashing yellow to the road with priority and flashing red to the approach that must stop and yield.
-
29. This sign is still standing late at night, and nobody is working. What should the driver assume?
Show answer
Answer B: The layout may still be altered, so the same care and reduced speed apply
Narrowed lanes, shifted alignments, dropped pavement edges and parked equipment remain overnight, so the hazard does not end when the crew goes home.
-
30. Your low beams light about 250 feet of road, but at your speed you would need more than that to stop. What is that called?
Show answer
Answer D: Overdriving your headlights
When your stopping distance is longer than the stretch of road your headlights show, you cannot react to anything you finally see. Slow down until you can.
-
31. You are the first driver on a road just after a storm. What should you plan for?
Show answer
Answer B: Branches, mud and other debris hidden around the next bend
Storm debris lands where nobody has cleared it yet, often just beyond a curve or a crest, so reduce speed and look much further ahead.
-
32. At a four-way stop another driver pulls out ahead of you when it was clearly your turn. What is the correct response?
Show answer
Answer B: Let that driver go through, then take your turn when the way is clear again
Right of way is something you give, never something you take, so yielding to a driver who takes it wrongly avoids a crash you would otherwise share.
-
33. Low sun is shining onto the signal ahead and you cannot tell which light is lit. What should you do?
Show answer
Answer D: Slow down and be ready to stop until you can be sure
An unreadable signal has to be treated as one that may be red, so approach slowly enough to stop while you work out what it shows.
-
34. You are approaching a highway-rail grade crossing marked only with a crossbuck sign. What does that sign require?
Show answer
Answer A: Yield to any approaching train and cross only when the tracks are clear
The crossbuck is a regulatory yield sign, and a train can never stop or steer around a vehicle, so the driver must always give way.
-
35. You reach a four-way stop after another driver has already stopped there. What should you do?
Show answer
Answer D: Let the driver who stopped first proceed before you go
At a four-way stop the vehicles proceed in the order they arrived, so a driver who stopped before you goes first.
-
36. Your vehicle has a blind spot warning light in the door mirror. What should that mean for your habits?
Show answer
Answer B: You still check the blind spot yourself, because the system can miss a rider
Blind spot systems are an aid, not a substitute, and a motorcycle or a bicycle can be missed or arrive faster than the sensor expects.
-
37. A signal on an entrance ramp changes from red to green and lets one vehicle at a time onto the highway. What should you do?
Show answer
Answer A: Stop on the red and go on the green, one vehicle for each green
A ramp meter spaces vehicles out so they join the highway one at a time instead of arriving as a group, and it is a traffic signal like any other.
-
38. You feel fine twenty minutes after your last drink. Why is that a poor guide to driving?
Show answer
Answer B: Your blood alcohol level can still be rising
Alcohol keeps being absorbed for some time after the last drink, so a driver who feels able at the door can be more impaired a few miles down the road.
-
39. You are approaching a multilane roundabout. When should you choose your lane?
Show answer
Answer C: Before you enter, using the lane-choice sign on the approach
You select your lane on the approach the way you would at any multilane intersection, then stay in that lane all the way around, because changing lanes inside a roundabout creates side-impact conflicts.
-
40. You want to pass on a two-lane road where several people are walking on the narrow shoulder ahead. What should you consider?
Show answer
Answer D: There is no escape room if the pass goes wrong, so wait for a better place
A pass depends on having somewhere to go if it goes wrong, and a shoulder occupied by pedestrians removes that option for both vehicles.