Highway & Freeway Driving — South Carolina

South Carolina 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: 4 questions. Updated

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 / MetricValue
TopicHighway & Freeway Driving
License testSouth Carolina CDL permit (CLP) knowledge tests
Topic questions4 (1% of 447 total)
Review statusThis 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 State CDL manual (based on the AAMVA model manual) link not yet collected

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Questions (4)

1. Laws about securing loads and regulating CMV weights may vary from state to state. During interstate travel:
  1. The law of the state in which the trip originated takes precedence.
  2. The law of the state the vehicle is in takes precedence. ✓
  3. The driver should request federal regulations to override conflicting state laws.
  4. The driver can choose which state’s laws to follow.

Answer: B. The law of the state the vehicle is in takes precedence.

Official handbook: Official handbook
2. If stopped on the road or shoulder, within 10 minutes, you must:
  1. Place emergency warning devices. ✓
  2. Alert local law enforcement.
  3. Stand behind your vehicle and motion for traffic to pass you.
  4. Call a mechanic.

Answer: A. Place emergency warning devices.

If you stop on the road or shoulder, you must place your emergency warning devices within 10 minutes. The handbook says that when you pull off the road and stop, you should turn on your four-way emergency flashers. It also says that if you must stop on a road or the shoulder, you must put out your emergency warning devices within ten minutes, and it then gives placement distances for those devices. That makes placing the warning devices the required action inside that ten-minute window, so the answer is the choice about setting out emergency warning devices.
Official handbook: Texas Commercial Driver License Handbook (DL-7C), Section 2 – Driving Safely, p. 39
3. When changing lanes, you should:
  1. Move quickly, before other vehicles can enter into the lane.
  2. Move slowly in case another vehicle is in the lane. ✓
  3. Not use a turn signal.
  4. 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.
Official handbook: Texas Commercial Driver License Handbook (DL-7C), Section 2 – Driving Safely, p. 39
4. Escape ramps are ramps that can be used:
  1. Only by automobiles, not trucks.
  2. To leave the highway and enter a two-lane highway.
  3. To stop runaway vehicles on steep downhills. ✓

Answer: C. To stop runaway vehicles on steep downhills.

Escape ramps are built to stop runaway vehicles on steep downgrades. The handbook says escape ramps have been built on many steep mountain downgrades to stop runaway vehicles safely without injuring drivers and passengers. It explains that they use a long bed of loose, soft material, sometimes with an upgrade, to slow a runaway vehicle. It also tells drivers who lose brakes going downhill to use an escape ramp if one is available, and warns that not using it can make a serious crash much more likely.
Official handbook: Texas Commercial Driver License Handbook (DL-7C), Section 2 – Driving Safely, p. 60
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Last checked: 2026-10-17 · Not yet verified

Updated: · Based on the official driver handbook