CDL Hazardous Materials Endorsement (HME)Hazardous Materials RegulationsMedium
A driver is transporting a shipment of UN1203, Gasoline, Class 3 (Flammable Liquid), in a cargo tank. The driver needs to park the vehicle for a short rest break. Which of the following parking locations is generally PROHIBITED for a placarded vehicle carrying gasoline?
- AOn private property with the owner's permission, away from buildings.
- BWithin 5 feet of the traveled portion of a public street or highway.
- CWithin 300 feet of a bridge, tunnel, or dwelling.
- DAt a truck stop in a designated HazMat parking area.
Show answer & explanationAnswer & explanation
Correct answer: C. Within 300 feet of a bridge, tunnel, or dwelling.
Federal regulations (49 CFR 397.7) prohibit parking a placarded vehicle carrying certain hazardous materials, including Class 3 Flammable Liquids, within 300 feet of a bridge, tunnel, dwelling, or place where people gather, unless specific conditions are met (e.g., attendance or specific local regulations).
Why the other options are wrong
- A. Parking on private property away from buildings with permission is generally allowed and often preferred.
- B. Parking within 5 feet of the traveled portion is generally prohibited for placarded vehicles carrying explosives or certain other materials, but 300 feet is a more encompassing restriction for flammables near structures.
- D. Designated HazMat parking areas at truck stops are specifically designed for such vehicles.
HazMat Parking Restrictions
Drivers transporting placarded hazardous materials must adhere to specific parking restrictions, including prohibitions from parking near certain structures or within specified distances of the traveled portion of a highway, to minimize public risk.
- Regulations in 49 CFR 397.7.
- Restrictions apply to placarded vehicles.
- Aim to keep hazardous materials away from population and critical infrastructure.
Memory trick: Park Smart, Park Far, Don't Be Near Any Car (or Building).