Driving Test Practice

Idaho: Freeway driving — Part 1 Practice Test

Questions in this part include: “What gives a single point urban interchange (SPUI) its name?” · “Which hazard can freeway driving encourage that the driver must guard against?”

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21 questions · About 8 min

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Questions are original and based on the official manual "Idaho Driver's Handbook" (July 2026), Idaho Transportation Department.

All 21 questions in this practice test

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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
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    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
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    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
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    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
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    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
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    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
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    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
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    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
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    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
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    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
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    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
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    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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