Traffic Signs & Signals — Idaho
Idaho CDL practice test: 416 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: 3 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 | Idaho CDL permit (CLP) knowledge tests |
| Topic questions | 3 (1% of 416 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 (3)
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. When approaching a drawbridge controlled by a green traffic light:
- You must stop.
- You may proceed without stopping. ✓
- You must wait for the light to change from green to yellow.
Answer: B. You may proceed without stopping.
3. When should a driver sign a vehicle inspection report?
- After every trip
- If noted defects are repaired ✓
- After each fueling
Answer: B. If noted defects are repaired
A driver should sign the vehicle inspection report if noted defects are repaired or certified as not needing repair. The handbook ties your signature to defect certification, not to completing a trip or stopping for fuel. It says a written inspection report may be required each day, and the motor carrier must fix any safety-related items listed and certify that repairs were done or were not needed. You sign the report only when defects were noted and that certification exists. The passenger-bus section repeats the same idea for reviewing the previous driver's report. That is why the signing point is after noted defects are repaired or cleared.
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Source
Last checked: 2026-10-17 · Verified from official source
Updated: · Based on the official driver handbook