Louisiana: Interstate driving — Part 3 Practice Test
Questions in this part include: “About how much room do you need to get up to the speed of interstate traffic when you enter from a full stop?” · “For about how long should you signal your intention to leave the interstate?”
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Questions are original and based on the official manual "Class D & E Driver’s Guide" (Revised August 2025 (DPSMV2052 R08/25)), Louisiana Office of Motor Vehicles.
All 18 questions in this practice test
Take the test above first, then use this list to study. Tap “Show answer” to see the correct answer and explanation.
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About how much room do you need to get up to the speed of interstate traffic when you enter from a full stop?
- About a full block
- About one car length
- About a half mile
- About three blocks
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Correct answer: About a full block
The manual says that to enter traffic from a full stop you will need about a full block to get up to the speed of the other vehicles.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 101 · Open this page in the manual (Manual page 101)
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Where should you stay on the interstate unless you are overtaking and passing, making an exit to the left, or letting another vehicle enter?
- In the middle lane
- In the far left lane
- In the right-hand lane
- In whichever lane has the least traffic
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Correct answer: In the right-hand lane
The manual says to stay in the right-hand lane unless overtaking and passing, making an exit to the left, or letting another vehicle enter.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 101 · Open this page in the manual (Manual page 101)
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On an interstate with three or more lanes in one direction, each with a specific function, where may you drive?
- Only in the right-hand lane
- In any lane
- Only in the middle lane
- Only in the far left lane
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Correct answer: In any lane
The manual says you may drive in any lane of an interstate with three or more lanes in one direction when each lane has a specific function.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 101 · Open this page in the manual (Manual page 101)
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On an interstate with three or more lanes in one direction, what is the right-hand lane used for?
- Passing
- Through travel only
- Emergency vehicles only
- Exiting and entering
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Correct answer: Exiting and entering
The manual says the right-hand lane is used for exiting and entering.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 101 · Open this page in the manual (Manual page 101)
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On a multi-lane interstate, what is the middle lane often used as?
- The “travel” lane
- The slow-vehicle lane
- The emergency-vehicle lane
- The left-turn lane
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Correct answer: The “travel” lane
The manual says the middle lane is often used as the travel lane.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 101 · Open this page in the manual (Manual page 101)
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On a multi-lane interstate, what is the far left lane used for?
- Entering and exiting
- Slow-moving vehicles only
- Passing
- Emergency stops
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Correct answer: Passing
The manual says the far left lane is for passing.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 101 · Open this page in the manual (Manual page 101)
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Near most interstate entrance points you see a “merge” sign. What does it warn you to be ready to do?
- Stop at the end of the lane and wait for a gap
- Adjust your speed or move into the left lane, if possible
- Leave the interstate at the next available exit
- Move into the right-hand lane to let others pass
Show answer
Correct answer: Adjust your speed or move into the left lane, if possible
The manual says the merge sign warns you to be ready to adjust your speed or move into the left lane, if possible, so other drivers can enter safely.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 101 · Open this page in the manual (Manual page 101)
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When you see an exit sign on the interstate, what should you be alert for in the right-hand lane?
- Vehicles that speed up to pass you on the right
- Vehicles stopped on the shoulder waiting to merge
- Vehicles backing up to reach the exit
- Drivers who suddenly slow or swerve into an exit lane
Show answer
Correct answer: Drivers who suddenly slow or swerve into an exit lane
The manual warns to be alert for drivers who suddenly slow or who swerve into an exit lane at the last second.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 101 · Open this page in the manual (Manual page 101)
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To make room for vehicles entering an interstate, what should you do if there is no one next to you?
- Speed up past the ramp
- Slow down and stop
- Stay in your lane and flash your headlights
- Move over a lane
Show answer
Correct answer: Move over a lane
The manual says to make room for entering vehicles and, if no one is next to you, to move over a lane.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 101 · Open this page in the manual (Manual page 101)
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About how far before your exit should you check that you are in the correct lane to make the exit?
- About one block
- About 100 feet
- About five miles
- Approximately a mile
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Correct answer: Approximately a mile
The manual says to check, approximately a mile before your exit, that you are in the correct lane.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 102 · Open this page in the manual (Manual page 102)
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If you need to cross several lanes to reach the lane for your exit, how should you change lanes?
- One at a time
- All at once with a single signal
- Only after you pass the exit
- In one move from the far left lane
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Correct answer: One at a time
The manual says to change lanes one at a time until you are in the proper lane to make the exit safely.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 102 · Open this page in the manual (Manual page 102)
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For about how long should you signal your intention to leave the interstate?
- About one second
- About two seconds
- About five seconds
- About fifteen seconds
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Correct answer: About five seconds
The manual says to signal your intention for approximately five seconds.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 102 · Open this page in the manual (Manual page 102)
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When leaving the interstate traffic lane for an exit, why should your speed not be too slow?
- So the exit sign stays in view
- So the flow of traffic can still move freely
- So the deceleration lane stays empty
- So you can reach the ramp speed sooner
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Correct answer: So the flow of traffic can still move freely
The manual says to leave the traffic lane at a proper speed, not too slow so the flow of traffic can still move freely.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 102 · Open this page in the manual (Manual page 102)
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If you miss your exit on the interstate, what should you do?
- Stop on the shoulder and wait for traffic to clear
- Back up carefully along the shoulder to your exit
- Slow down and back up in the right-hand lane
- Go on to the next exit and return to the exit you want
Show answer
Correct answer: Go on to the next exit and return to the exit you want
The manual says not to stop or back up if you miss your exit: go on to the next exit, get back on the interstate and return.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 102 · Open this page in the manual (Manual page 102)
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Where should you slow down when leaving the interstate?
- In the deceleration lane, once you are fully in it
- In the right-hand lane just before the exit begins
- On the shoulder next to the start of the exit
- In the lane used for passing
Show answer
Correct answer: In the deceleration lane, once you are fully in it
The manual says never to slow down on the interstate itself but to wait until you are fully in the deceleration lane.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 102 · Open this page in the manual (Manual page 102)
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Once you are fully in the deceleration lane, to what speed should you reduce your speed?
- The posted minimum speed
- The speed of interstate traffic
- The posted ramp speed
- About 20 miles per hour
Show answer
Correct answer: The posted ramp speed
The manual says to reduce your speed to the posted ramp speed once you are fully in the deceleration lane.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 102 · Open this page in the manual (Manual page 102)
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After you exit the interstate, what should you be aware of ahead?
- One-way traffic only
- Two-way traffic
- Higher speed limits
- Traffic signals on the ramp
Show answer
Correct answer: Two-way traffic
The manual says to be aware of two-way traffic ahead after you exit from the interstate.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 102 · Open this page in the manual (Manual page 102)
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What should you look ahead for to find out about the exit you want and the lane you must use?
- The brake lights of the vehicles ahead of you
- The color of the pavement
- Marks on the shoulder
- Signs telling you about the exit and the lane
Show answer
Correct answer: Signs telling you about the exit and the lane
The manual says to look ahead for signs telling you about the exit you want and the lane you must use.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 102 · Open this page in the manual (Manual page 102)