Traffic Signs & Signals — Arizona

Arizona CDL practice test: 413 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. Updated 2026-10-18

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	Arizona CDL permit (CLP) knowledge tests
Topic questions	4 (1% of 413 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 State CDL manual (based on the AAMVA model manual) link not yet collected

Questions (4)

1. What is the symbol for a marine pollutant?

The image of a bird in a red octagon
The image of a fish in a white triangle with an X through through the fish ✓
A light blue square with a dark blue X through the square

Answer: B. The image of a fish in a white triangle with an X through through the fish

The marine pollutant symbol is a white triangle containing a fish with an X drawn through the fish. The handbook, in its section on the List of Marine Pollutants, describes the Marine Pollutant marking as a white triangle with a fish and an "X" through the fish. It explains that any bulk packages of a marine pollutant must display this marking, and that the same marking must also appear on the outside of the vehicle. So the symbol you are looking for is the fish inside the white triangle crossed out.

Official handbook: Texas Commercial Driver License Handbook (DL-7C), Section 9 – Hazardous Materials, p. 117

2. If you doubt that you have enough space to safely drive under a bridge or sign, you should:

Drive faster.
Drive more slowly. ✓
Drive on the shoulder.

Answer: B. Drive more slowly.

You should drive more slowly when you are not sure you have enough space to drive under a bridge or sign. The handbook says that if you doubt you have safe space to pass under an object, you should go slowly. It also says that if you are not sure you can make it, take another route. It notes that low bridges and underpasses often have warning signs, but sometimes they do not. That makes doubt a reason to be cautious, not to try the clearance at higher speed.

Official handbook: Texas Commercial Driver License Handbook (DL-7C), Section 2 – Driving Safely, p. 45

3. A driver should test the tractor protection valve by: