Final answer:
If you are hauling hazardous materials and have single-unit tires on your vehicle, you must stop and check them every time you park.
Step-by-step explanation:
According to the United States Department of Transportation hazardous materials regulations, if you are hauling hazardous materials and have single-unit tires on your vehicle, you must stop and check them every time you park. Single-unit tires are tires that are not dual tires and are commonly found on trailers or light-duty trucks.
This requirement is in place to ensure the safety of the vehicle and the surrounding environment. Hazardous materials have the potential to cause serious harm if there is a tire failure or leakage. Regularly checking the tires can help identify any issues early on and prevent accidents or spills.
Therefore, it is important for drivers hauling hazardous materials with single-unit tires to follow this regulation and inspect their tires whenever they park.