Your safety and the safety of other drivers and pedestrians depends a lot on what you do before driving. Before moving your vehicle, you should adjust your seat, adjust your mirrors, fasten your safety belt, and secure items in and on your vehicle. Do not wait until your vehicle is moving to adjust your mirrors.

When leaving an interstate, you should maintain your speed until you enter the deceleration lane, at which point you should reduce your speed to the exit ramp's posted advisory speed.

Legal medications, both prescription and over-the-counter, can potentially impair your ability to drive. Always consult with your doctor or pharmacist if you have questions about how a particular drug or drug combination will affect your ability to drive. You should particularly make a point of talking with your doctor if they give you a prescription for a tranquilizer or sedative.

This sign is posted on one-way streets and other roadways where a driver is not allowed to enter. A driver may see this sign if attempting to enter an expressway ramp in the wrong direction.

If your vehicle is hit from the rear while you are in forward motion, your body will be thrown backward. Press yourself against the back of your seat and put your head against the head restraint to prevent whiplash. Maintain a firm grip on the steering wheel and be ready to apply your brakes to avoid being pushed into another vehicle.

Warning signs are usually yellow with black markings. This sign warns drivers about an upcoming steep hill. Drivers should slow down and be ready to control their speed and protect their brakes from damage.

A three-sided yield sign indicates that you must slow down and be ready to stop, if necessary, to let any vehicle, bicyclist, or pedestrian pass before you proceed. In this case, you do not have the right-of-way.

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

Pedestrians using guide dogs or white canes (with or without a red tip) must be given the right-of-way at all times.

Never assume other drivers will give you the right-of-way. Yield your right-of-way whenever it helps prevent collisions.

In rainy weather, you should lower your speed to reduce the risk of hydroplaning. Driving too fast may cause your tires to ride up on the water and lose contact with the surface of the road, making it very difficult to control your vehicle.

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.

It is necessary to follow farther behind a large truck than you would if following a passenger vehicle because trucks have larger blind spots.

When driving, do not develop a fixed stare. Frequently check your rearview mirrors so you know the positions of vehicles near you.

This sign marks a one-way road, entrance, or exit. If you are facing this sign, traffic is coming toward you. Turn around if you are driving toward this sign.

Low beam headlights should be used when driving in rainy or foggy weather. Even if they do little to help you see, low beams will make it easier for others to see you.

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

This sign indicates that there is an intersection with a side road ahead.

Do not go around or under any lowered gate at a railroad crossing. Once the gate is raised, do not proceed across the tracks until you can see clearly in both directions and are sure there are no trains coming.

You must yield the right-of-way to any emergency vehicle that is using its siren and flashing lights. Do this by driving to the right edge of the road and stopping, taking care not to stop in an intersection. You may move again after the emergency vehicle has passed.

When driving, watch for warning signs of fatigue. You are too tired to drive safely if you are struggling to keep your eyes open, drifting from your lane, or turning up the radio and rolling down your windows to keep yourself awake. If you notice these signs, it is a good idea to find a safe place to park so you can refresh yourself with a short nap.

Dashed yellow lines separate single lanes of traffic moving in opposite directions. Passing is allowed when there is no oncoming traffic in the passing lane.

On rainy, snowy, or foggy days, it may be difficult for other drivers to see your vehicle. Under these conditions, headlights make your vehicle easier to see. If the weather requires you to turn on your windshield wipers, you must also turn on your low beam headlights.

When a vehicle makes a turn, the rear wheels follow a shorter path than the front wheels. The longer the vehicle, the bigger the difference between the paths of the front and rear wheels. Therefore, long trucks often have to swing wide to complete a right turn.

When entering the interstate on a short entrance ramp where there is no acceleration lane, speed up only after you have identified a gap in traffic. In general, you should be stopped while waiting for a gap to appear.