Traffic Signs & Signals — Arkansas
Arkansas CDL practice test: 464 free practice questions (Based on the official driver handbook). The official format is not yet verified; check the official site before your test. Traffic Signs & Signals: 4 questions.
Regulatory, warning and guide signs, plus traffic light and pavement marking questions.
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 | Traffic Signs & Signals |
| License test | Arkansas CDL permit (CLP) knowledge tests |
| Topic questions | 4 (1% of 464 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 (4)
1. A driver should test the tractor protection valve by:
- Pulling the yellow, diamond-shaped knob.
- Releasing air with the brake pedal. ✓
- Unlocking the trailer doors.
Answer: B. Releasing air with the brake pedal.
2. What does the trailer air supply control look like?
- It is a square blue knob.
- It is a triangular yellow knob.
- It is an eight-sided red knob. ✓
- It is a circular orange knob.
Answer: C. It is an eight-sided red knob.
The trailer air supply control on newer vehicles is a red eight-sided knob. The handbook describes the trailer air supply control in the cab, which operates the tractor protection valve. On newer vehicles it is a red knob with eight sides. You push it in to send air to the trailer and pull it out to cut the air off and apply the trailer emergency brakes. The same knob pops out on its own when air pressure falls to roughly 20 to 45 psi, closing the tractor protection valve. Older vehicles may instead have a lever rather than a knob.
3. If a traffic light has been green for a long time:
- It will probably stay green as you approach.
- It is likely broken.
- It is likely that the light will soon change to yellow. ✓
- It is likely the light will skip yellow and change from green to red.
Answer: C. It is likely that the light will soon change to yellow.
If a traffic light has been green for a long time, expect it to soon change to yellow. The handbook tells drivers to look far ahead and treat a long-lasting green as a sign that the light will probably change before they arrive. It says to start slowing down and be ready to stop. Since the change is expected as you approach, the best match is that yellow is likely coming soon. The manual does not say the light is broken or that it will skip yellow.
4. When approaching a drawbridge with a green light:
- You must stop.
- You may proceed without stopping. ✓
- You must wait for the light to change to yellow.
Answer: B. You may proceed without stopping.
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Last checked: 2026-10-17 · Not yet verified
Updated: · Based on the official driver handbook