Before changing lanes, check your side and rearview mirrors for traffic approaching you from behind. Use your turn signal to let other drivers know you plan to change lanes. Check for other drivers who also may be moving into the same lane.

If you accumulate a total of four points within 12 months, you will be sent a point accumulation advisory letter. If you accumulate a total of eight or more points within 18 months, your driving privileges will be suspended.

Driving while impaired or intoxicated is a serious traffic safety problem. Safe driving is not possible when you drink alcohol or take other drugs. Driving under the influence is dangerous both to you and to others on the road.

Worn or bald tires can increase your stopping distance and make turning more difficult. Tires without adequate tread also increase the risk of hydroplaning.

A steady yellow light tells you the traffic signal is changing from green to red. Slow down and stop for a steady yellow light, unless you are already within the intersection or cannot safely stop before entering the intersection.

Check the traffic behind you several times a minute to know if another driver is tailgating, approaching too fast, or trying to pass. If another car is following you too closely, slow down and let it pass. Most rear-end collisions are caused by vehicles following too closely.

When heavy rain reduces visibility, reduce your speed. Turn on your headlights so other drivers can see your vehicle. If the rain is so heavy that you are unable to see clearly, drive onto the shoulder and stop until the rain lets up.

You must stop at a railroad crossing when directed to do so by a flagger, stop sign, or warning devices, such as gates or flashing lights. Not all railroad crossings are equipped with such devices. It is against the law to drive around lowered railroad crossing gates.

A motorcycle is a full-size vehicle with the same privileges as any other vehicle on the roadway. You should allow a motorcyclist a full lane width. Although it may seem as though there is enough room in the traffic lane for a larger vehicle and a motorcycle, remember that the motorcycle needs room to maneuver safely.

Hydroplaning happens when a vehicle glides on top of a thin layer of water between its tires and the road. Tires with low air pressure or bad tread can increase the risk of hydroplaning. Speeding also increases the risk.

Safety belts can double your chance of surviving a crash and more than double your chance of avoiding serious injury. Airbags, when used properly with safety belts, provide additional protection in a front-end crash. You should wear both shoulder and lap belts.

Because hydroplaning is caused by driving too quickly in wet conditions, the risk of it happening can be reduced by driving more slowly.

Tinting or sun-screening material is permitted on side and rear windows. Front door windows may be tinted to no more than 65 percent light blockage.

White lines are used to separate traffic moving in the same direction. Solid lines indicate that drivers are not permitted to pass.

When you are approached by an emergency vehicle that is using its lights, sirens, and/or other warning devices, you must immediately drive to the right side of the road and stop.

This sign indicates that the road ahead curves to the right and then to the left. You should slow down to be able to negotiate these curves safely.

Your tires become less effective at clearing water from the road as you increase your speed. If you drive too fast, they may lose their grip entirely, leaving the vehicle sliding on a film of water. This is known as "hydroplaning."

Warning signs are usually diamond-shaped with black markings on a yellow background. They alert drivers to upcoming hazards. This sign indicates that there may be pedestrians crossing the road ahead.

Before you change lanes or make a turn, let other drivers know what you are going to do by signaling. You can signal with your hand and arm or with your vehicle’s turn signals and brake lights. You should signal at least 100 feet before you change lanes or turn so the other drivers can be ready to react to your movements.

In snowy weather, keep your windshield and mirrors clear. Increase your following distance when driving in wet and cold weather because a slippery road surface will increase the distance needed for your vehicle to stop.

If you must drive in foggy conditions, you should use your low beam headlights, as well as your fog lights, if your vehicle has them. High beams direct their light upwards, where it can bounce off the fog and into your eyes, reducing visibility even more.

Your ability to stop is greatly affected by the condition of the road. You need to reduce your speed when road conditions are poor in order to maintain control of your vehicle. You will be at risk if you are driving too quickly on roads that are slippery and you need to stop.

Yield the right-of-way to the driver on your right at a four-way intersection if you both arrive to the intersection at the same time. You may then proceed when it is safe to do so.

When approaching a flashing red signal, you must stop and yield to all traffic that does not have to stop.

This sign indicates that there is a sharp right turn ahead.