A driver of a placarded hazmat vehicle approaching a tunnel that prohibits hazmat must:
Correct. Many tunnels prohibit certain placarded vehicles. Use the designated alternate route. Bypassing the prohibition is a serious violation.
CDL Practice Question #258
Category: Hazmat
Why this question matters
This question is one of 68 in our Hazmat bank. The reasoning above comes directly from the AAMVA CDL Manual, the source document used by every U.S. state DMV. Memorizing the underlying rule — not just the letter answer — is what separates passing on the first attempt from a return trip and another fee.