Driving Test Practice

Idaho: Freeway driving

Entering and leaving freeways, interchanges, merging, lane changes and what to do if you miss your exit. Split into 2 shorter tests so you're not stuck in one long quiz.

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Freeway driving — Part 1

Questions in this part include: “What gives a single point urban interchange (SPUI) its name?”

21 questions≈ 8 min
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Freeway driving — Part 2

Questions in this part include: “What should you do if you cannot or do not want to drive at the posted speed on a freeway?”

20 questions≈ 8 min
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All 41 Freeway driving questions with answers

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  1. What gives a single point urban interchange (SPUI) its name?

    • The single lane that serves all of the exit ramps
    • The single bridge that carries the highway over the cross street
    • The single stop line used by all traffic
    • The traffic signals that control turns from a single point at the center
    Show answer

    Correct answer: The traffic signals that control turns from a single point at the center

    A SPUI is named for the traffic signals that control turns from a single point at its center.

    Source: Idaho Driver's Handbook (July 2026), page 64 · Open this page in the manual

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  2. At a single point urban interchange, why should you stop at the stop lines?

    Overhead view of an interchange: a freeway runs under a bridge, ramps from the freeway meet the cross street at one signalized intersection in the middle of the bridge, and cars are on the ramps and the cross street.
    • So you can see the signals at the next interchange ahead of you
    • So you are not too far out in the intersection, impeding cross-traffic
    • So pedestrians can use the lane beside you to cross the road
    • So you can merge onto the highway before other traffic
    Show answer

    Correct answer: So you are not too far out in the intersection, impeding cross-traffic

    Stopping at the stop lines keeps you from being too far out in the intersection and impeding cross-traffic.

    Source: Idaho Driver's Handbook (July 2026), page 64 · Open this page in the manual

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  3. Going straight through a single point urban interchange, which lanes should you use?

    Overhead view of an interchange: a freeway runs under a bridge, ramps from the freeway meet the cross street at one signalized intersection in the middle of the bridge, and cars are on the ramps and the cross street.
    • The left-turn lanes marked with a left arrow
    • One of the two through lanes
    • The right lane only
    • The exit ramp lane
    Show answer

    Correct answer: One of the two through lanes

    To go straight at a SPUI, stay in one of the two through lanes.

    Source: Idaho Driver's Handbook (July 2026), page 64 · Open this page in the manual

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  4. You exit a freeway by mistake at a single point urban interchange. What should you do?

    Overhead view of an interchange: a freeway runs under a bridge, ramps from the freeway meet the cross street at one signalized intersection in the middle of the bridge, and cars are on the ramps and the cross street.
    • Travel straight across the highway and get on at the other side
    • Stop at the stop line and wait for a signal to turn around
    • Back up the exit ramp to the freeway
    • Turn left or right and find a safe place to turn around
    Show answer

    Correct answer: Turn left or right and find a safe place to turn around

    If you exit by mistake you cannot go straight across; turn left or right and find a safe place to turn around.

    Source: Idaho Driver's Handbook (July 2026), page 64 · Open this page in the manual

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  5. At a single point urban interchange, which lane do drivers stay in when turning right as they exit the interstate?

    Overhead view of an interchange: a freeway runs under a bridge, ramps from the freeway meet the cross street at one signalized intersection in the middle of the bridge, and cars are on the ramps and the cross street.
    • The right lane
    • The left lane
    • The center lane
    • Either lane
    Show answer

    Correct answer: The right lane

    Drivers turning right stay in the right lane when exiting the interstate.

    Source: Idaho Driver's Handbook (July 2026), page 64 · Open this page in the manual

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  6. At a single point urban interchange, which lane do drivers use when turning left as they exit the interstate?

    Overhead view of an interchange: a freeway runs under a bridge, ramps from the freeway meet the cross street at one signalized intersection in the middle of the bridge, and cars are on the ramps and the cross street.
    • The right lane
    • The center lane
    • The left lane
    • Either lane
    Show answer

    Correct answer: The left lane

    Drivers turning left exit the interstate in the left lane.

    Source: Idaho Driver's Handbook (July 2026), page 65 · Open this page in the manual

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  7. What does a diverging diamond interchange (DDI) do?

    • Temporarily channels traffic lanes to the right side of the highway to create access to the interstate
    • Temporarily channels traffic lanes to the left side of the highway to create direct access with the interstate
    • Replaces the signals with a circular intersection to access the interstate
    • Uses one signal at the center to control all turns to the interstate
    Show answer

    Correct answer: Temporarily channels traffic lanes to the left side of the highway to create direct access with the interstate

    A DDI temporarily channels traffic lanes to the left side of the highway for direct access to the interstate.

    Source: Idaho Driver's Handbook (July 2026), page 65 · Open this page in the manual

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  8. What will drivers notice at a diverging diamond interchange?

    • All traffic stays on the right side of the bridge the whole way
    • Drivers must stop at the center of the bridge before crossing
    • Opposing traffic crosses at the signals on each side of the bridge
    • Traffic enters the interchange without any traffic signals
    Show answer

    Correct answer: Opposing traffic crosses at the signals on each side of the bridge

    Drivers will notice that opposing traffic crosses at the signals on each side of the bridge or overpass.

    Source: Idaho Driver's Handbook (July 2026), page 65 · Open this page in the manual

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  9. Why must motorists stop at the stop lines at a diverging diamond interchange?

    Top view of an interchange where a cross road passes over a freeway on a bridge and its two directions of traffic cross to opposite sides at signal-controlled points at each end of the bridge, with ramps to the freeway and several cars.
    • So they are not out in the intersection impeding cross-traffic, pedestrians, or bicyclists
    • So they can check the lane markings on the bridge before entering the interchange
    • So they can give way to traffic that is exiting the interstate onto the cross street
    • So they can see the signals on the opposite side of the bridge before they enter
    Show answer

    Correct answer: So they are not out in the intersection impeding cross-traffic, pedestrians, or bicyclists

    Stopping at the stop lines keeps motorists out of the intersection where they could impede others.

    Source: Idaho Driver's Handbook (July 2026), page 65 · Open this page in the manual

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  10. Going straight over a diverging diamond interchange, where does your lane lead after the first traffic signal?

    • To the opposite side of the overpass, then back to the right side
    • Straight along the right side of the overpass and onto the highway
    • Into a left-turn lane that leads onto the interstate
    • To the center island, where you wait for the second signal
    Show answer

    Correct answer: To the opposite side of the overpass, then back to the right side

    Drivers going straight follow their lane to the opposite side of the overpass, then back to the right side after the second signal.

    Source: Idaho Driver's Handbook (July 2026), page 66 · Open this page in the manual

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  11. At a diverging diamond interchange, drivers who want to turn onto the highway approach in which lane?

    Top view of an interchange where a cross road passes over a freeway on a bridge and its two directions of traffic cross to opposite sides at signal-controlled points at each end of the bridge, with ramps to the freeway and several cars.
    • The right lane
    • The center lane
    • The left lane
    • Any lane
    Show answer

    Correct answer: The left lane

    Drivers who will turn onto the highway approach the interchange in the left lane.

    Source: Idaho Driver's Handbook (July 2026), page 66 · Open this page in the manual

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  12. Where is backing always prohibited?

    • Only in the travel lanes of freeways, but not on the shoulder
    • Only on roads with a posted speed limit above 55 miles per hour
    • On freeways and other controlled-access highways, including the shoulder
    • Only on roads with more than two lanes
    Show answer

    Correct answer: On freeways and other controlled-access highways, including the shoulder

    Backing is always prohibited on freeways, expressways and other controlled-access highways, including the shoulder.

    Source: Idaho Driver's Handbook (July 2026), page 82 · Open this page in the manual

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  13. Why are freeways usually safer than other kinds of roads?

    A divided highway with two lanes in each direction separated by a wide grass median, with cars, an SUV and a box truck spread across the lanes
    • They have lower speed limits and no trucks, buses, or motorcycles
    • They have no curves, no hills, and fewer lanes
    • They have cross traffic only at signals
    • They have one-way traffic, few entrances, and special safety features
    Show answer

    Correct answer: They have one-way traffic, few entrances, and special safety features

    The manual says freeways are usually safer because of one-way traffic, limited entrances and other special safety features.

    Source: Idaho Driver's Handbook (July 2026), page 83 · Open this page in the manual

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  14. Which hazard can freeway driving encourage that the driver must guard against?

    • Boredom and fatigue
    • Frequent cross traffic
    • Glare from oncoming headlights
    • Frequent stops at signals
    Show answer

    Correct answer: Boredom and fatigue

    The manual says freeways can encourage boredom and fatigue that the driver must guard against.

    Source: Idaho Driver's Handbook (July 2026), page 83 · Open this page in the manual

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  15. What should your travel plan for a long freeway trip include stops for?

    • Fuel only
    • Sightseeing and shopping
    • Food, rest, and fuel
    • Inspection of the vehicle by a mechanic
    Show answer

    Correct answer: Food, rest, and fuel

    The manual says to plan for food, rest, and fuel stops before a long freeway trip.

    Source: Idaho Driver's Handbook (July 2026), page 83 · Open this page in the manual

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  16. What should you know before starting a short freeway trip?

    • Only the speed limit of the freeway
    • The name, route, entrance, and exit numbers
    • Only the weather forecast for the trip
    • The length of every freeway on your route
    Show answer

    Correct answer: The name, route, entrance, and exit numbers

    On short trips the manual says to know the name, route, entrance, and exit numbers.

    Source: Idaho Driver's Handbook (July 2026), page 83 · Open this page in the manual

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  17. What should you tell someone before a long freeway trip?

    • Only your starting time and the make and color of your vehicle
    • Your license number and plate number
    • Nothing, because the trip is private
    • Your plans, route, how long you will be gone, and when to expect you back
    Show answer

    Correct answer: Your plans, route, how long you will be gone, and when to expect you back

    The manual says to let someone know your plans, route, time away and when to expect you back.

    Source: Idaho Driver's Handbook (July 2026), page 83 · Open this page in the manual

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  18. What are the three basic parts of a freeway entrance?

    • An entrance ramp, an acceleration lane, and a merging area
    • An entrance ramp, a passing lane, and an exit lane
    • A merging area, a median, and a shoulder
    • A toll booth, an acceleration lane, and a deceleration lane
    Show answer

    Correct answer: An entrance ramp, an acceleration lane, and a merging area

    Freeway entrances usually have an entrance ramp, an acceleration lane and a merging area.

    Source: Idaho Driver's Handbook (July 2026), page 83 · Open this page in the manual

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  19. What do you have a chance to do while you are on a freeway entrance ramp?

    A blue car on a curved entrance ramp that joins a three-lane freeway with steady traffic
    • Pass slower vehicles
    • Stop and rest before merging
    • Observe traffic conditions on the freeway
    • Reach the full speed limit of the freeway
    Show answer

    Correct answer: Observe traffic conditions on the freeway

    The manual says the entrance ramp gives you a chance to observe traffic conditions on the freeway.

    Source: Idaho Driver's Handbook (July 2026), page 83 · Open this page in the manual

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  20. What should you do in the acceleration lane of a freeway entrance?

    A blue car with its left signal on in the acceleration lane of an entrance ramp beside a multi-lane highway with traffic
    • Slow down and look for a gap in traffic
    • Accelerate to the speed of freeway traffic
    • Stop and wait for an opening to appear
    • Drive at the speed of traffic on the ramp
    Show answer

    Correct answer: Accelerate to the speed of freeway traffic

    The ramp straightens into the acceleration lane, where you should accelerate to the speed of freeway traffic.

    Source: Idaho Driver's Handbook (July 2026), page 83 · Open this page in the manual

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  21. Into which lane must you blend with traffic in the merging area of a freeway entrance?

    Overhead view of a curved freeway entrance ramp beside a green FREEWAY ENTRANCE sign, with the blue car partway up the ramp.
    • The freeway's inside lane
    • The freeway's left-most passing lane
    • The median lane
    • The freeway's outside lane
    Show answer

    Correct answer: The freeway's outside lane

    In the merging area you must blend into the flow of traffic on the freeway's outside lane.

    Source: Idaho Driver's Handbook (July 2026), page 83 · Open this page in the manual

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  22. If you enter a freeway by the wrong entrance by mistake, what must you never try to do?

    A divided freeway with two lanes each way and a wide grass median, crossed midway by an empty paved crossover strip, with cars and a box truck in their lanes.
    • Back up or turn around
    • Wait until the next exit
    • Check traffic around you
    • Signal before changing lanes
    Show answer

    Correct answer: Back up or turn around

    The manual says never to back up or turn around through the median if you enter the wrong entrance.

    Source: Idaho Driver's Handbook (July 2026), page 84 · Open this page in the manual

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  23. If you need to get off the freeway or change directions, when should you do so?

    A divided freeway with two lanes each way and a wide grass median, crossed midway by an empty paved crossover strip, with cars and a box truck in their lanes.
    • At the nearest median crossover
    • On the shoulder, when no traffic is near
    • At the next exit
    • At the next break in the median
    Show answer

    Correct answer: At the next exit

    The manual says to wait until the next exit to get off the freeway or change directions.

    Source: Idaho Driver's Handbook (July 2026), page 84 · Open this page in the manual

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  24. Once on the entrance ramp, over which shoulder do you begin looking for a gap in freeway traffic?

    A blue car on a curved entrance ramp that joins a three-lane freeway with steady traffic
    • Your right shoulder
    • Your left shoulder
    • Neither, you should rely only on your mirrors
    • Whichever is closer to the lane you want
    Show answer

    Correct answer: Your left shoulder

    The manual says to signal and begin looking over your left shoulder for a gap in the traffic.

    Source: Idaho Driver's Handbook (July 2026), page 84 · Open this page in the manual

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  25. When merging onto a freeway, who must yield?

    A blue car with its left signal on in the acceleration lane of an entrance ramp beside a multi-lane highway with traffic
    • Traffic already on the highway must yield to you
    • The vehicle that is going faster must yield
    • The vehicle in the left lane must yield
    • You must yield to the traffic already on the highway
    Show answer

    Correct answer: You must yield to the traffic already on the highway

    The manual reminds drivers entering that they must yield to the traffic already on the highway.

    Source: Idaho Driver's Handbook (July 2026), page 84 · Open this page in the manual

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  26. When can you make a simple lane change, merge with the flow of vehicles, and turn off your turn signal after entering a freeway?

    A blue car with its left signal on in the acceleration lane of an entrance ramp beside a multi-lane highway with traffic
    • Once you are traveling at the speed of traffic
    • As soon as you enter the ramp
    • As soon as you reach the acceleration lane
    • After you have passed the first exit
    Show answer

    Correct answer: Once you are traveling at the speed of traffic

    The manual says you can do so once you are traveling at the speed of traffic.

    Source: Idaho Driver's Handbook (July 2026), page 84 · Open this page in the manual

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  27. In heavy traffic on a freeway entrance, what might you have to do if there is no opening?

    A blue car on an entrance ramp that joins an expressway through a very short merging lane, beside a steady line of traffic in the right lane
    • Speed up and force your way in ahead of traffic
    • Stop on the entrance ramp and back up
    • Slow down before the end of the acceleration lane
    • Drive on the shoulder to pass the traffic
    Show answer

    Correct answer: Slow down before the end of the acceleration lane

    If there is no opening, the manual says you may have to slow down before reaching the end of the acceleration lane.

    Source: Idaho Driver's Handbook (July 2026), page 84 · Open this page in the manual

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  28. If a short acceleration lane and heavy traffic force you to stop, what should you be sure to leave?

    A blue car on an entrance ramp that joins an expressway through a very short merging lane, beside a steady line of traffic in the right lane
    • Enough room behind to back up if needed
    • Enough room ahead to accelerate to freeway speed
    • A gap of at least one full lane on your right
    • Room for the next car to pull alongside
    Show answer

    Correct answer: Enough room ahead to accelerate to freeway speed

    The manual says to leave enough room ahead so you can accelerate up to the speed of freeway traffic as you merge.

    Source: Idaho Driver's Handbook (July 2026), page 84 · Open this page in the manual

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  29. After you are forced to stop on a short acceleration lane, what should you do once there is a gap large enough?

    A blue car on an entrance ramp that joins an expressway through a very short merging lane, beside a steady line of traffic in the right lane
    • Merge slowly at the speed you are going
    • Accelerate gently without signaling
    • Wait for a second gap before entering
    • Signal and accelerate as rapidly as you can
    Show answer

    Correct answer: Signal and accelerate as rapidly as you can

    The manual says to signal your entrance and accelerate as rapidly as you can to blend in with the traffic flow.

    Source: Idaho Driver's Handbook (July 2026), page 85 · Open this page in the manual

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  30. Once on the freeway, what speed should you maintain?

    A divided highway with two lanes in each direction separated by a wide grass median, with cars, an SUV and a box truck spread across the lanes
    • A steady speed that keeps up with traffic flow
    • A speed below the flow of traffic to be safe
    • A speed that changes with each lane
    • The slowest speed that keeps you in the lane
    Show answer

    Correct answer: A steady speed that keeps up with traffic flow

    The manual says to maintain a steady speed and keep up with the flow of traffic.

    Source: Idaho Driver's Handbook (July 2026), page 85 · Open this page in the manual

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  31. What should you do if you cannot or do not want to drive at the posted speed on a freeway?

    • Drive in the left lane at a lower speed
    • Drive on the shoulder
    • Choose another kind of road to travel
    • Turn on your hazard lights and drive slowly
    Show answer

    Correct answer: Choose another kind of road to travel

    The manual says to choose another kind of road if you can't or don't want to drive at the posted speed on a freeway.

    Source: Idaho Driver's Handbook (July 2026), page 85 · Open this page in the manual

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  32. On a freeway, which lane is for higher-speed traffic and passing?

    A divided highway with two lanes in each direction separated by a wide grass median, with cars, an SUV and a box truck spread across the lanes
    • The far right lane
    • The left lane
    • The center lane
    • The entrance lane
    Show answer

    Correct answer: The left lane

    The manual says the left lane is for higher-speed traffic and passing.

    Source: Idaho Driver's Handbook (July 2026), page 85 · Open this page in the manual

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  33. Most of the time, which lane or lanes should you drive in on a freeway?

    A divided highway with two lanes in each direction separated by a wide grass median, with cars, an SUV and a box truck spread across the lanes
    • The far left lane
    • The left lane or the shoulder
    • The lane with the fastest traffic
    • The far right or center lane
    Show answer

    Correct answer: The far right or center lane

    The manual says most of the time you should drive in the far right or center lane.

    Source: Idaho Driver's Handbook (July 2026), page 85 · Open this page in the manual

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  34. During rush hours, which freeway lane should you avoid?

    A divided highway with two lanes in each direction separated by a wide grass median, with cars, an SUV and a box truck spread across the lanes
    • The right lane
    • The left lane
    • The center lane
    • Every lane except the shoulder
    Show answer

    Correct answer: The right lane

    The manual says to avoid the right lane during rush hours to leave room for drivers entering the freeway.

    Source: Idaho Driver's Handbook (July 2026), page 85 · Open this page in the manual

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  35. How long should you signal before making a lane change or exiting a freeway?

    • At least two seconds
    • At least three seconds
    • At least five seconds
    • At least one second
    Show answer

    Correct answer: At least five seconds

    The manual says to always signal for at least five seconds before a lane change or exit.

    Source: Idaho Driver's Handbook (July 2026), page 85 · Open this page in the manual

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  36. Driving across a barrier or unpaved strip that separates the two halves of a roadway is illegal except where?

    A divided highway with two lanes in each direction separated by a wide grass median, with cars, an SUV and a box truck spread across the lanes
    • At any place where there is no oncoming traffic
    • At an authorized opening or crossover
    • At any place where the strip is narrow
    • At any exit ramp
    Show answer

    Correct answer: At an authorized opening or crossover

    The manual says it is illegal except at an authorized opening or crossover. On interstate highways (freeways), this is not allowed.

    Source: Idaho Driver's Handbook (July 2026), page 85 · Open this page in the manual

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  37. What makes getting off a freeway a simple maneuver?

    Top view of a three-lane expressway approaching an exit ramp with a green EXIT sign; your blue car is in the right lane.
    • Slowing down on the freeway before reaching the exit
    • Stopping at the end of the exit lane to check traffic
    • Taking the first exit you see
    • Knowing which exit to take and following the lane signs
    Show answer

    Correct answer: Knowing which exit to take and following the lane signs

    The manual says exiting is simple if you know which exit to take and follow the signs marking the lane for that exit.

    Source: Idaho Driver's Handbook (July 2026), page 85 · Open this page in the manual

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  38. About how far before your freeway exit should you signal and move into the lane nearest the exit if you are not already in it?

    • About a half mile
    • About 100 feet
    • About one mile
    • About a quarter mile
    Show answer

    Correct answer: About a half mile

    The manual says to signal and move into the lane nearest the exit about a half mile before the exit.

    Source: Idaho Driver's Handbook (July 2026), page 86 · Open this page in the manual

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  39. What is the deceleration lane on a freeway exit provided for?

    A blue car with its right signal on moving from a multi-lane highway into a deceleration lane that leads to an exit ramp
    • To let you pass slower vehicles on the ramp
    • To let you stop and check your mirrors
    • To slow down without interrupting traffic flow
    • To let trucks park before the ramp
    Show answer

    Correct answer: To slow down without interrupting traffic flow

    The deceleration lane lets you slow down without interrupting the flow of traffic.

    Source: Idaho Driver's Handbook (July 2026), page 86 · Open this page in the manual

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  40. What should you do when an exit speed is posted on a freeway ramp?

    A yellow vertical rectangular sign reading EXIT 25 MPH
    • Keep the freeway speed until the end of the ramp
    • Adjust your speed accordingly as you drive through the ramp
    • Stop at the start of the ramp before entering it
    • Drive at the speed of the vehicle ahead whatever the sign says
    Show answer

    Correct answer: Adjust your speed accordingly as you drive through the ramp

    The manual tells drivers to adjust their speed to the posted exit speed through the ramp.

    Source: Idaho Driver's Handbook (July 2026), page 86 · Open this page in the manual

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  41. When you leave a freeway ramp and enter another thoroughfare, what should you expect?

    • Lighter traffic and faster speeds than on the freeway
    • The same traffic conditions as on the freeway
    • Traffic that always yields to you
    • More complicated, dangerous traffic and slower speeds
    Show answer

    Correct answer: More complicated, dangerous traffic and slower speeds

    You may be driving in more complicated, dangerous traffic than on the freeway, so you must be alert and adjust to the new conditions and slower speeds.

    Source: Idaho Driver's Handbook (July 2026), page 86 · Open this page in the manual

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