423. You are required to stop at a railroad grade crossing when:

General Knowledgemedium

Aa. You are transporting hazardous materials.

Bb. The cargo makes a stop mandatory under state or federal regulations.

Cc. The crossing gates are up.

Detailed Explanation

The correct answer is "b. The cargo makes a stop mandatory under state or federal regulations.". This is based on federal CDL regulations and safety standards.

Correct Answer: b. The cargo makes a stop mandatory under state or federal regulations.

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423. You are required to stop at a railroad grade crossing when:

Detailed Explanation

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