It is illegal to transport liquids or gases in a leaking tank. If you do drive a leaking tank, you may be liable for the costs of cleaning up the spilled material.

You must have a commercial driver license with a hazardous materials endorsement before driving a vehicle of any size that is used to transport hazardous materials, even if the vehicle is not transporting hazardous materials at the time of operation.

All commercial motor vehicles must carry appropriate emergency equipment, including fire extinguishers.

Always turn the engine off before refueling a vehicle carrying hazardous materials. Someone must always be at the nozzle controlling the fuel flow.

When a vehicle is traveling on a downward slope, the force of gravity will cause its speed to increase.

Factors that affect how much liquid is safe to load into your tank include how much the liquid will expand in transit, the weight of the liquid, and legal weight limits.

Always change lanes slowly and smoothly. If there is a vehicle in the other lane that you did not see before beginning to move, they will have more time to react to your vehicle.

Failure to keep the fifth wheel plate properly lubricated can create friction between the tractor and trailer, causing steering problems.

The faster you drive, the hotter your engine and tires will become. When it is very hot, you can help prevent this overheating by decreasing your speed.

When experiencing a cargo fire, it may be a bad idea to open the doors to the trailer. Doing so allows oxygen to enter the area, potentially causing the fire to flare up and expand.

Tires need to have at least 4/32 of an inch of tread depth in every major groove on the front tires, and at least 2/32 of an inch of tread depth on other tires.

Always observe posted speed limits for work zones. Slow down if road or weather conditions are adverse, and slow down even more if workers are on or near the road.

Tractors without semi-trailers are referred to as "bobtail tractors." Bobtail tractors are difficult to operate and drivers must exercise caution.

When driving on a wet road surface, the risk of hydroplaning is increased if your tire pressure is too low or your tire tread is too worn. If you begin to hydroplane, release the accelerator and push in the clutch to slow down.

A rollover happens as a result of a driver changing lanes or turning too quickly.

When inspecting a vehicle, you should check for required safety equipment. This includes warning devices for parked vehicles, fuses, and liquid burning flares.

Containers of hazardous materials should be braced so they will not fall, slide, or bounce around during transportation.

The function of an Anti-Lock Braking System (ABS) is to help prevent wheel lockup during hard braking. With ABS equipped on your vehicle, you should drive and brake in the same manner that you would without it.

After starting the engine, warning lights and buzzers should go out right away. If a light stays on, it usually indicates an issue with the vehicle.

Cargo should be inspected before beginning a trip, within the first 50 miles of the trip, and every three hours or 150 miles traveled thereafter. The driver of a truck transporting cargo is responsible for the cargo being safely secured throughout the trip.