Drivers making a left turn must yield to all vehicles approaching from the opposite direction. This includes bicycles and motorcycles.

The speed limit in a school zone is 15 mph. Drive with extra caution when driving where children or other pedestrians may be present.

Regulatory signs provide notice to road users of traffic laws that must be obeyed. This particular sign tells you the maximum speed limit for the stretch of highway where it is posted. You may drive more slowly than the posted speed limit, based on road conditions, but it is illegal to drive any faster than the posted speed limit.

You may turn left onto a one-way street that moves to the left if there is no sign prohibiting the turn. You may not turn left onto a one-way street where traffic moves to the right.

The stop sign is the only eight-sided sign you will see on any roadway. When you encounter a stop sign, you must come to a complete stop. You may not proceed until the way is clear for you to completely and safely pass through the intersection.

A driver should watch beside, ahead, and to the rear of their car. To be a good driver, you must know what is happening all around your vehicle.

You must use extreme caution wherever children are playing or gathering. This means that you must use caution not only around schools and playgrounds, but also in neighborhoods, where children may be playing in the streets.

Drivers should decrease their speed when driving under unfavorable weather conditions. The posted speed limits are intended only for the most ideal conditions.

Alcohol, in any concentration, is a depressant. It slows all nerve impulses and bodily functions, resulting in a lessening of inhibitions and negatively affecting a consumer's ability to concentrate and stay alert.

The posted maximum speed limit is the fastest legal speed you can travel on a road under ideal conditions. It is safest to drive at the same speed as surrounding traffic, up to the maximum speed limit. Maintaining a safe speed at all times is a responsibility shared by all motorists.

Warning signs alert drivers to upcoming hazards and are usually yellow with black markings. This sign warns drivers about potential traffic merging into their lane from the right.

When passing, you should not return to your original lane until you can see both headlights of the passed vehicle in your rearview mirror. Always check your blind spots before moving back into your original lane.

Only the passage of time can remove alcohol and its impairing effects from the body.

Blind spots are areas that a driver cannot see if they look in their mirrors. Large trucks have large blind spots that drivers of other vehicles should avoid.

When driving on a rural interstate, the speed limit is 70 miles per hour. If a different speed limit is posted, follow the posted speed limit.

Drivers must obey any instructions given by a police officer, even if the instructions contradict laws, signs, signals, or markings that would otherwise apply.

Only use your horn when it is necessary to avoid collisions. Do not use your horn if a driver or bicyclist is moving slowly and you want him or her to drive faster or get out of your way.

Even if a vehicle is properly equipped with rearview and outside mirrors, it still has blind spots that cannot be seen in the mirrors. Large trucks have much larger blind spots than most passenger vehicles.

After coming to a full stop, vehicles should proceed through a four-way stop in the order in which they arrive to the intersection. If multiple vehicles arrive at the same time, the vehicle on the left must yield the right-of-way to the vehicle on the right.

Being under the influence of alcohol affects your judgment. Good judgement is necessary to react appropriately to things that you see or hear while on the road. Even if you are below the legal blood alcohol limit, consuming any amount of alcohol is likely to affect your ability to drive safely.

Driving too slowly can be dangerous because it may cause drivers behind you to become frustrated and make dangerous moves to pass you. It is safest to drive with the flow of traffic, within the legal speed limit.

Increase your following distance when it is difficult to see due to darkness. Use headlights to increase visibility, following the rules for proper use of high beams and low beams. Avoid looking directly at the headlights of an oncoming vehicle to avoid being blinded by the glare.

A round sign means you are approaching a railroad crossing. This sign is posted a few hundred feet in front of the tracks and tells drivers to slow down, look, listen, and prepare to stop.

It is not advisable to drive after drinking any amount of alcohol. Even a single drink will affect your ability to drive safely.

Before merging into interstate traffic, you should identify a gap, accelerate to the speed of traffic, and signal. Merge into the gap when it is safe to do so. Be alert to other traffic and do not expect other drivers to clear the lane.

To avoid contributing to chronic traffic congestion, you should not "rubberneck." That is, you should not slow down to look at out-of-the-ordinary things.

Using a cell phone while driving is dangerous because it occupies the user's eyes, hands, and mind. Even the most skilled drivers increase their risk of being involved in a crash by using a cell phone on the road.

To prevent skidding on slippery surfaces, avoid especially slippery areas, such as ice patches, wet leaves, oil, or deep puddles. The safest surface for driving is a dry, solid surface.

This sign warns of a reverse curve in which the road curves to the right, then to the left.

This sign warns that a steep downgrade is ahead on the road. Drivers should check their brakes.