South Dakota CAR DMV Practice Test 23

In foggy or misty conditions, you should not use your headlights on their high beam setting because the light will be reflected back into your eyes.

Warning signs are usually yellow with black markings. They alert you to conditions that are immediately ahead. This sign warns drivers that the number of lanes is reduced ahead and that traffic should merge left.

Signs with a red circle and diagonal line over a black symbol indicate the the action represented by the symbol is prohibited. In this case, the sign indicates that right turns are prohibited.

When passing is permitted, look for both headlights of the passed vehicle in your rearview mirror. Only then may you safely return to your original lane.

Blind or partially blind pedestrians may carry a white cane or use the assistance of a guide dog. You must yield the right-of-way to a pedestrian with a guide dog or a white cane.

If an oncoming driver fails to dim their high beams, you should avoid looking directly at the headlights. Instead, look toward the right edge of your lane and watch the oncoming vehicle out of the corner of your eye.

Excessive vehicle speed can have disastrous effects. As a vehicle's speed increases, the potential impact of a collision also increases, elevating the possibility of serious injury and death. Increase your following distance as your speed increases to ensure that you will be able to stop safely if needed.

Always be aware of what is happening around your vehicle. Constantly observing your surroundings to the front, sides, and rear of your vehicle will help you see problems that may require you to change speed or roadway position.

Always set your parking brake when you park. Leave the vehicle in gear if it has a manual transmission or in “Park” if it has an automatic transmission.

When being passed, you must yield to the passing vehicle and not increase your speed. Allow the vehicle to safely merge back into your lane.

Blind spots are areas around your vehicle that you cannot see by using your mirrors. Check your blind spots by turning your head and glancing over your shoulders.

Expect a train on any track, at any time, traveling in either direction. If you need to stop after crossing the tracks, wait until you can completely cross the tracks before proceeding. Make sure your vehicle clears the tracks before you stop.

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.

To stay aware of hazards, you should scan the road and check your rearview mirrors every two to five seconds. Constantly staring at just the road ahead of you is dangerous. If you must drive in foggy conditions, you should use your low beam headlights, not your high beam headlights.

Drivers must use their turn signals before changing lanes or making a turn. Drivers traveling at high speeds should signal four to five seconds before moving to the left or right.

A reflective orange triangle on the rear of a vehicle means the vehicle often moves at speeds of 25 mph or slower. You may see this decal on construction equipment, farm vehicles, and horse-drawn wagons or carriages.

A five-sided sign indicates that you are near a school. Be aware and stop if children are in the crosswalk.

Warning signs are usually yellow with black markings. This sign warns drivers that they are arriving upon a fork in the road and they must bear either right or left.

Legal prescription and over-the-counter drugs can impair your ability to drive, including drugs taken for colds, hay fever, allergies, or to calm nerves or muscles. It is illegal to drive while under the influence of any drug that impairs your ability to drive safely; this law does not differentiate between illegal, prescription, or over-the-counter drugs.

South Dakota state law requires all vehicles to be properly registered and insured at all times. Drivers must keep proof of responsibility in the vehicle.

Head restraints are designed to prevent whiplash if your vehicle is hit from behind. They should be adjusted to contact the back of your head.

A driver’s ability to safely operate a vehicle may be impaired at any BAC level, even a level lower than the legal limit. Any amount of alcohol can affect one’s judgment and physical coordination. Driving under the influence of even a small amount of alcohol can lead to criminal charges.

A white rectangular sign indicates that you must obey the stated rule. This sign means that drivers should not pass other vehicles for any reason.

Before changing lanes, you should check your side mirrors and look over your shoulder to make sure it is safe to proceed.

This sign marks the presence of a crosswalk. Be alert to any pedestrians that may be crossing the roadway.