A driver is transporting a bulk quantity of UN1203, Gasoline (Class 3, PG II). The driver needs to leave the vehicle unattended for a short period. What is the maximum distance the driver can be from the vehicle for it to still be considered 'attended'?
- AWithin 100 feet of the vehicle and have it within their unobstructed view.
- BWithin 50 feet of the vehicle.
- CWithin 200 feet of the vehicle and able to respond immediately.
- DThere is no maximum distance, as long as the driver is able to respond to an emergency.
Show answer & explanationAnswer & explanation
Correct answer: A. Within 100 feet of the vehicle and have it within their unobstructed view.
For most placarded vehicles that are not carrying Class 1.1, 1.2, or 1.3 explosives, the federal regulations (49 CFR 397.5) state that a vehicle is considered 'attended' if the driver is within 100 feet of the vehicle and has it within their unobstructed view, or if the vehicle is within an approved safe haven. Gasoline is a Class 3 flammable liquid, so these rules apply.
Why the other options are wrong
- B. 50 feet is not the specified regulatory distance for unattended placarded vehicles.
- C. 200 feet is not the specified regulatory distance for unattended placarded vehicles.
- D. There are specific maximum distances and conditions for a vehicle to be considered 'attended' when the driver is not in it; it's not open-ended.
Attended Vehicle Definition (General HazMat)
For most placarded vehicles (excluding certain explosives), 'attended' means the driver is within 100 feet of the vehicle and has it within their unobstructed view, or the vehicle is in an approved safe haven.
- Applies to most placarded vehicles carrying hazardous materials.
- Driver must be within 100 feet.
- Driver must have an unobstructed view of the vehicle.
- Alternatively, vehicle can be in an approved safe haven.
Memory trick: 100 feet, clear sight: that's how you attend a placarded truck.