In the U.S., drivers commonly tote fuel cans to the station to power our lawn mowers and other toys and equipment. Watching someone fill up their containers this week got me wondering: When is carrying gasoline in a vehicle actually illegal? Turns out that, under certain circumstances, driving around with fuel cans is indeed illegal. Let’s review some of these situations.

It’s illegal to carry gasoline in your car when you are…

• Using an improper container
• Improperly storing or securing fuel containers
• Carrying gasoline in prohibited areas
• Violating certain local and state regulations, including DOT transport laws

The U.S. Department of Transportation (DOT) considers gasoline a hazardous material. As such, it’s illegal to transport it in unapproved containers. Cans must be designed specifically for fuel and meet safety standards. For example, Underwriters Laboratories (Underwriters Laboratories) or American Society for Testing and Materials (ASTM) labels are approved. Don’t use glass jugs or other random, unlabeled containers.

Further, it’s illegal to transport gasoline in certain ways. Most states have totally banned carrying a gas can in occupant areas. Otherwise, not securing them properly such that they tip over might also be considered illegal. Gasoline containers must be upright, securely fastened, and located in a well-ventilated area, like the trunk or truck bed.

Certain areas, like tunnels, bridges, or ferries, may have specific regulations prohibiting the transportation of hazardous materials, including gasoline. Ignoring these restrictions can be illegal.

Some states or local areas may have additional rules. For example, urban areas with stricter environmental laws might impose more stringent requirements. If you’re transporting gasoline for commercial purposes, you’ll need to follow Department of Transportation (DOT) regulations, which include using specific containers, having proper labeling, and adhering to quantity limits.

Don’t carry full cans of gasoline around in your car longer than you need to. This includes storing extra gas in your trunk without a specific, immediate use in mind. Think about it; toting gas cans might turn your car into a literal firebomb in the event of an accident.

While transporting gasoline in your passenger car is generally legal, check your state and local laws to ensure you’re carrying it properly.