On a bus designed to carry standing passengers, no passengers may stand in front of the rear of the driver's seat. Any such bus must have a line on the floor, or some other marking, that indicates where passengers may not stand. This is called a standee line.

The first hazardous materials class includes explosives such as ammunition, dynamite, and fireworks.

A leaking exhaust system can introduce carbon monoxide, which is poisonous, into the cab or sleeper berth.

Because air pressure increases as air expands in the heat, it is important to monitor your tire pressure when driving in very hot weather. To prevent the engine from overheating, there must be an adequate amount of oil in the engine, as well as enough water and antifreeze in the cooling system. Antifreeze is helpful for the engine in both hot and cold weather.

Driving while fatigued can be extremely dangerous. Strategies for preventing drowsiness while driving include getting a full night's sleep before a trip; having someone ride with you; scheduling trips for times during which you are normally awake; and avoiding medications that may cause drowsiness. Exercising regularly can increase your energy levels and make you less likely to become tired while driving.

Be sure to activate the appropriate turn signal well in advance of a turn or lane change. Signal continuously throughout the turn and make sure to cancel the signal after the turn is completed, if your vehicle doesn't have self-canceling signals.

Empty trucks require longer stopping distances than full trucks because they have less traction available.

Distractions while driving can be physical (such as reaching for an object), mental (such as making conversation with a passenger), or both (such as holding a phone to send texts). Strategies to help you avoid distracted driving include pre-programming radio stations; planning out your route in advance; avoiding complex or emotionally taxing conversation while driving; adjusting your mirrors before setting out; and not eating, drinking, or smoking while behind the wheel.

When inspecting an exhaust system, you should verify that parts of the system are not loose, broken, or missing. The system's parts must be properly mounted and should not be rubbing against moving parts of the vehicle.

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.

For safe driving, it is essential that you maintain cushions of space on all sides of your vehicle. This helps to ensure that you will have time to take appropriate action if a problem arises.

Black ice is a layer of ice that is thin and clear enough for the road to be visible through it. The surface will look like a wet road. Always be alert to black ice if the road looks wet when the temperature is below freezing.

After starting the engine of a vehicle equipped with an Anti-Lock Braking System (ABS), the indicator light should come on and then turn off. If the light stays on, something is wrong with the ABS.

Check hydraulic brakes by pumping the brake pedal three times before applying firm pressure to the pedal for five seconds. The pedal should not move. If it does, there may be a leak or some other problem in the braking system.

When asked to make a turn during the on-road driving test, you must check traffic in all directions and use your turn signal.

Defects in an exhaust system are very dangerous because they can cause poisonous fumes to enter the cab or sleeper berth.

Backing is always dangerous and should be avoided whenever possible. When parking, look to park in a space that will allow you to pull forward when exiting.

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.

Drivers behind you may not anticipate how slowly your CMV must travel to safely make a right turn. You can help warn them in advance by braking early and slowing gradually.

Strong winds can make it difficult for a driver to maintain control of their vehicle. Usually, this is especially true for drivers of lighter CMVs.