Highway & Freeway Driving — Illinois
Illinois CDL practice test: 447 free practice questions (Based on the official driver handbook). The official format is not yet verified; check the official site before your test. Highway & Freeway Driving: 7 questions.
Entering and exiting freeways, lane changes, overtaking and HOV lane rules.
This topic page is still being reviewed against the official handbook. Until review is finished it is hidden from search engines.
| Topic / Metric | Value |
|---|---|
| Topic | Highway & Freeway Driving |
| License test | Illinois CDL permit (CLP) knowledge tests |
| Topic questions | 7 (2% of 447 total) |
| Review status | This topic page is still being reviewed against the official handbook. Until review is finished it is hidden from search engines. |
Official handbook
Not yet verified
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Questions (7)
1. When passing another vehicle, you should:
- Make eye contact with the driver.
- Assume the driver doesn’t see you. ✓
- Honk your horn.
- Wait for the other driver to signal that it is safe to do so.
Answer: B. Assume the driver doesn’t see you.
When passing another vehicle, assume the driver does not see you. The handbook says other drivers may not notice your vehicle even when it is plainly visible. When you are about to pass a vehicle, pedestrian, or bicyclist, you should assume they do not see you because they could suddenly move in front of you. It adds that you may tap the horn lightly when legal, or flash your lights at night, but you must still drive carefully enough to avoid a crash even if they do not see or hear you. So the safe rule is to expect that the other driver has not noticed you.
2. When passing another vehicle, you should:
- Make eye contact with the other driver.
- Assume the other driver doesn’t see you. ✓
- Honk your horn.
- Wave to other drivers.
Answer: B. Assume the other driver doesn’t see you.
When passing another vehicle, you should assume the other driver does not see you. The handbook's communication section says other drivers may not notice your vehicle even when it is plainly visible. For passing, it gives a specific rule: whenever you are about to pass a vehicle, pedestrian, or bicyclist, assume they do not see you, because they could suddenly move in front of you. That is why you should expect the other driver to be unaware of you and drive carefully enough to avoid a crash, using a light horn tap or a night-time light flash only when it is legal.
3. When passing another vehicle, you should:
- Make eye contact with the driver.
- Assume the other driver doesn't see you. ✓
- Honk your horn.
- Not use a turn signal.
Answer: B. Assume the other driver doesn't see you.
When passing another vehicle, assume the other driver does not see you. The handbook says other drivers may not notice your vehicle even when it is clearly visible. When you are about to pass a vehicle, pedestrian, or bicyclist, it tells you to assume they do not see you, because they could move in front of you. It also says to drive carefully enough to avoid a crash even if they do not see or hear you. A light horn tap when legal, or flashing lights at night, is extra communication; it does not replace that assumption.
4. When changing lanes, you should:
- Move quickly, before other vehicles can enter into the lane.
- Move slowly in case another vehicle is in the lane. ✓
- Not use a turn signal.
- Avoid the right lane.
Answer: B. Move slowly in case another vehicle is in the lane.
You should move slowly and smoothly when changing lanes, in case another vehicle is in the lane. The handbook says to signal before changing lanes, then change lanes slowly and smoothly. It explains that this gives a driver you did not see a chance to honk or avoid your vehicle. That matches moving slowly in case another vehicle is already there. The goal is not to hurry across; it is to give yourself and others time to react.
5. When changing lanes, you should:
- Wave at other drivers.
- Use your mirrors. ✓
- Not use your signals.
- Quickly swerve your vehicle into the other lane.
Answer: B. Use your mirrors.
When changing lanes, you should use your mirrors to make sure no one is alongside you or about to pass. The handbook treats lane changes as a special situation that needs more than regular mirror checks. Before you move over, check your mirrors to confirm there is enough room. Then check again after signaling to see whether someone has slid into your blind spot, and check right after you start the change to confirm your path is clear. The mirrors are what tell you whether the space you want is actually open.
6. Simply changing lanes can cause:
- A “crack-the-whip” effect, resulting in a rollover. ✓
- A trailer to straighten out.
- Confusion over which lane the driver is hoping to use.
- Other drivers to reduce their speed.
Answer: A. A “crack-the-whip” effect, resulting in a rollover.
Simply changing lanes can cause a “crack-the-whip” effect that turns the trailer over. The combination vehicles section tells you to avoid quick lane changes, especially when loaded. It explains that trucks with trailers have a dangerous crack-the-whip effect, and a quick lane change can turn the trailer over. The doubles and triples section adds that these vehicles must be driven smoothly and that you should change lanes gradually to avoid rollover or jackknife. So the hazard tied directly to changing lanes is the trailer being whipped over, not a benefit or a vague social effect.
7. The maximum height permitted for all vehicles on Illinois highways is:
- 8 feet.
- 12 feet, 2 inches.
- 13 feet, 6 inches. ✓
- 19 feet.
Answer: C. 13 feet, 6 inches.
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Last checked: 2026-10-17 · Verified from official source
Updated: · Based on the official driver handbook