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CDL · Driving and Parking

While transporting explosives (Class 1) or certain other hazardous materials, what restriction commonly applies to the vehicle?

Reviewed by Jordan Morley, Editorial Lead at 247SimpleTests. Written by the 247SimpleTests Editorial Team from the official source material cited on every question.

Correct answer

Restrictions such as attending the vehicle at all times, route restrictions (avoiding tunnels/populated areas where required), and no smoking near the vehicle

  1. A It must travel at maximum speed
  2. B Restrictions such as attending the vehicle at all times, route restrictions (avoiding tunnels/populated areas where required), and no smoking near the vehicle
  3. C It can be left unattended anywhere
  4. D It can ignore all traffic laws

Why this is the answer

Transporting explosives and certain other hazmat involves special restrictions: ATTENDING the vehicle (a qualified person must monitor it; it generally can't be left unattended); ROUTE restrictions (avoiding tunnels, certain bridges, and densely populated areas where required by regulation or local rules); NO SMOKING within a set distance of the vehicle; parking restrictions; secure parking requirements. CDL hazmat. These rules minimize the risk to the public from a hazmat incident. Drivers must know and follow applicable route, parking, attendance, and handling restrictions for the materials they carry. Knowing these common restrictions (attendance, routes, no smoking) for high-hazard materials is commonly tested.
Source: FMCSA CDL Manual — Hazmat, Transport Restrictions

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About this topic: Driving and Parking

Driving and parking with hazmat covers route restrictions, railroad-crossing stops, where you may and may not park with explosives or flammables, attending the vehicle, and what to do in a fire or leak. This is one of 17 Hazardous Materials questions on driving and parking, each with a full explanation on a single study page.

New to this exam? Our CDL exam guide explains the format, scoring, and how to prepare.

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