A driver should inspect wheels before a drive, specifically looking for damage on the wheels and rims. Wheels or rims that have had welding repairs are not safe for use.

The doors of a trailer should be not be opened in the event of a cargo fire, especially if the cargo includes hazardous materials. Opening trailer doors would increase the fire's oxygen supply, potentially causing the fire to increase in size.

If you begin to feel tired while driving, you should stop to get some sleep. Trying to push on to reach your destination while tired is dangerous. You should not rely on caffeine to keep you awake.

B:C fire extinguishers are designed to work on electrical fires and burning liquids. Don't pour water on an electrical fire.

An Anti-Lock Braking System (ABS) helps prevent wheels from locking up during a hard application of brakes.

Completing the steps of a vehicle inspection in the same order before every trip aids in learning what the proper steps are. Additionally, you be less likely to forget a step when going through the checklist in a prescribed order.

If a vehicle is top-heavy, it is more likely to roll over. The weight of cargo should be positioned as low in a trailer as possible to minimize this risk.

A common cause of vehicle fires in the aftermath of an accident is the improper use of flares near spilled fuel. Use flares with caution.

You should be cautious when passing parked vehicles. A person may step out of a parked vehicle or out from between parked vehicles without looking for oncoming traffic. A driver may begin moving their vehicle before realizing you are there.

The suspension system holds up a vehicle and its load while keeping the axles in place. Defects in this system are extremely dangerous.

The total stopping distance for vehicles equipped with air brakes is made up of four factors: perception distance, reaction distance, brake lag distance, and braking distance. When braking at a speed of 55 mph while driving on dry pavement, the brake lag can add around 32 feet to the vehicle's total stopping distance.

If you must stop on the side of the road, make sure to use your four-way emergency flashers. This is particularly important at night.

Hydroplaning can occur in places where water collects on the road. Clear reflections, tire splashes, or rain drops on the road can indicate the presence of standing water.

Transporting cargo that is loaded with a high center of gravity increases the risk that the transporting vehicle will tip over. Cargo should be loaded with a safe weight distribution.

If you aren't sure that you have room for your vehicle to safely fit under an overhead object, you should slow down while approaching it. Seek an alternate route, if possible.

To travel safely, it is essential that you know what is happening on all sides of your vehicle at all times. Use your mirrors frequently to help you remain aware of your surroundings.

On many vehicles, multi-speed rear axles and auxiliary transmissions are used to provide extra gears.

Most heavy vehicles with unsynchronized manual transmissions require double clutching to change gears.

Wheels or rims that have had welding repairs should never be used.

It is best not to avoid driving in fog. However, if you must drive under foggy conditions, be sure to decrease your speed.