South Dakota CAR DMV Practice Test 1

To avoid the dangers of fatigued driving, take breaks every hour or so during a long trip. If possible, share driving responsibilities with another person so you can each sleep while the other person drives.

This sign warns a driver of a change in direction or a narrowing of the road. A driver may find several of these signs on the outside of a sharp curve or on approaches to a narrow bridge.

It is illegal to operate a motor vehicle while under the influence of alcohol. Neither drivers nor passengers may possess an open container of alcohol in a motor vehicle while it is in operation.

Treat a flashing red light the same as a stop sign. Come to a complete stop at the stop line or, if there is no stop line, prior to the crosswalk and before entering the intersection. Yield to all other traffic and pedestrians.

At a railroad crossing marked with this sign, a driver should look both ways, listen for any trains, and be prepared to stop if any trains are nearby. Never try to outdrive an oncoming train.

When stopped for a traffic violation, a driver must produce their license, proof of registration, and proof of insurance. Drivers are required to have all three of these documents in a vehicle any time it is being driven.

Alcohol and other drugs can negatively effect a number of skills needed for safe driving, including a driver's reaction time, coordination, alertness, and ability to concentrate.

When there is a solid yellow line and a broken yellow line in the center of the road, passing is permitted from the side of the road next to the broken line.

Do not stop in travel lanes for any reason (confusion, breakdown, letting out a passenger, etc.). Keep moving until you can safely pull off the road.

Fatigue causes errors related to speed and distance, increases your risk of being in a crash, and causes you to take more time to make decisions. When you are fatigued, you could fall asleep behind the wheel and crash, injuring or killing yourself or others.

High beam headlights let you see twice as far as low beam headlights. It is important to use high beams on unfamiliar roads, in construction areas, or where there may be people along the side of the road. Only use high beams if other vehicles are not nearby.

This sign warns that the road ahead becomes slippery when wet.

A round yellow sign indicates that there is a railroad crossing ahead.

You may not know what is on the other side of a hill or just around a curve, even if you have driven the road many times. If a vehicle is stalled just out of sight on the roadway, you must be able to stop. Whenever you come to a hill or curve, adjust your speed so you can stop if necessary.

A solid yellow light means "caution" and signals that the light will soon turn red. You should stop at a solid yellow light if you can do so safely; otherwise, you should cautiously cross the intersection.

Although the right-of-way rules provide a guide to determine who should yield the right-of-way at an intersection, no one should assume they automatically have the right-of-way. The situation and circumstances at an intersection must always be considered. Drivers should yield their legal right-of-way if it can help prevent a collision.

Before changing lanes, signal, look in all your mirrors, and look over your left or right shoulder to make sure the lane next to you is clear. Looking over your shoulder is a way to check your blind spot to be sure there is no vehicle, motorcycle, or bicycle traffic in the next lane.

Alcohol slows your reflexes and reaction time, reduces your ability to see clearly, and makes you less alert. As the amount of alcohol in your body increases, your judgment worsens and your driving skills decrease. You will have trouble judging distances, speeds, and the movement of other vehicles.

A warning sign is usually yellow with black markings. This sign warns that the number of lanes ahead is reduced and that traffic will need to merge to the left.

Pennant-shaped yellow signs like this are used to indicate a no passing zone.

When passing another vehicle that is traveling in the same direction as you, pass quickly to resume visibility. Return to your previous lane only when you can see both of the vehicle's headlights in your rearview mirror.

When changing lanes, look over your shoulder in the direction you plan to move. Check for obstructions near the rear corners of your vehicle. These areas are called “blind spots” because you cannot see them by using your mirrors.

You should always signal when moving your vehicle to the right or left. On an interstate, you should stay in the right lane if you are moving more slowly than the surrounding traffic. It is illegal to back up or make a U-turn on interstate highways, so if you miss your exit, you should proceed to the next exit.

Yellow lines mark the center of a road used for two-way traffic. A solid yellow centerline indicates that drivers may not cross the line to pass. A broken yellow centerline indicates that drivers may cross the line to pass, but only if passing would not interfere with traffic.

Warning signs are usually yellow with black markings. This sign warns that merging traffic will be entering from the right, so drivers should prepare to allow the incoming traffic to safely merge.