This sign warns that the overpass ahead has a low clearance. Do not proceed if your vehicle is taller than the height indicated (in this case, 13 feet, 6 inches).

Your blood alcohol content (BAC) depends on how much alcohol you drink, how much time passes between drinks, and your weight. Eating before or while you drink helps slow the absorption of alcohol somewhat, but it cannot prevent intoxication or impairment if you have too much to drink.

Motorcycles are smaller and harder to see than cars. Because of their size, they are easily hidden in a car’s blind spot. It may be difficult to judge your distance to a motorcycle and difficult to tell how fast a motorcycle is moving, so always be alert and extra cautious when near a motorcyclist.

When entering a freeway, use the on-ramp to accelerate to the speed of freeway traffic so you can blend in smoothly and safely. Entering traffic must yield to traffic already on the freeway.

If a driver's left arm and hand are extended downward, they are indicating that they intend to stop. Adjust your driving accordingly if following a driver who is using this hand signal.

If you look into the headlights of an oncoming vehicle, the pupil of your eye will contract. After the oncoming vehicle has passed, there will be an interval of time during which the pupil must readjust to the less intense light. During this recovery period, you are virtually driving blind.

The ability to drive safely is dependent on the driver being in good physical condition. Driving can be impaired by alcohol, legal and illegal drugs, and being drowsy.

The diagonal stripes on a barricade or vertical panel guide drivers in the correct direction. Stripes sloping downward and to the right mean drivers should bear to the right. Conversely, stripes sloping downward and to the left mean drivers should bear to the left.

As alcohol builds up in your system, it will slow your reactions, make you feel more confident, and cause you to make more errors.

Warning signs prepare drivers for upcoming road conditions and hazards and are usually yellow with black markings. This sign warns drivers that there is an upcoming sharp turn and that they should lower their speed accordingly.

North Dakota law requires that your headlights be activated between sunset and sunrise. You are required by law to use low beam headlights, not your bright lights, when within 500 feet of an approaching vehicle. You must also use your low beams when following within 300 feet of another vehicle.

Motorcycles are entitled to the width of a full lane. Be sure your vehicle is entirely in the left lane before attempting to pass a motorcycle on the left.

You must yield the right-of-way to all emergency vehicles using a siren, air horn, and/or flashing red, blue, or white lights. Where possible, you must pull over to the right edge of the road. If you are in an intersection, drive through the intersection before you pull over.

A solid yellow line next to your lane means that passing is not permitted from your direction.

Large vehicles can cause wind gusts with a force great enough to cause direction changes in smaller vehicles. Drivers of small vehicles should be prepared to take proper corrective steering action when approaching or passing large vehicles that are moving at or near maximum speeds.

The exhaust system helps remove toxic gases, reduce the noise, and cool the hot gases coming from a running engine. Fumes from a leaky exhaust system can cause death in a very short time. They can also make you drowsy while driving.

Maximum speed limits indicate the fastest speed a driver may legally drive under ideal conditions. When driving in a business or residential district, the maximum speed limit is 25 miles per hour. If a different speed limit is posted, follow the posted limit.

The distance that a vehicle needs to stop depends on the motorist's reaction time, weather and visibility conditions, the vehicle's weight, the conditions of the vehicle's brakes, the condition and type of the vehicle's tires, roadway conditions, and speed.

Diamond-shaped signs warn drivers of existing or potential driving hazards. You will usually see these signs in yellow or orange.

This sign indicates that there is merging traffic entering from the right.

Two solid yellow lines down the center of a two-way road mean that neither lane of traffic may cross the lines, unless they are turning off of the roadway. A driver can cross double yellow lines when turning into or out of a driveway or entrance to a business. No passing is allowed over a solid yellow line.

Bicycles on the road are considered vehicles and have the same rights and responsibilities as motor vehicles. Drivers of motor vehicles should respect the rights of bicyclists.

Be prepared to reduce your speed and use caution when directed to do so by a sign, flagger, or law enforcement officer. Failure to do so is illegal and is dangerous to those working in construction zones.

Warning signs prepare drivers for upcoming road conditions and hazards and are usually yellow with black markings. This sign tells drivers that they are approaching an area with low clearance.

Yellow lines are used to separate traffic moving in opposite directions. Dashed lines indicate that drivers directly next to the line are permitted to pass when it is safe to do so.