A sign with a red circle and slash over a symbol indicates that the action represented by the symbol (in this example, a right turn) is not allowed.

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.

The distance required to stop your vehicle depends on perception time, reaction distance, and braking distance. This changes with speed and road conditions.

If involved in an accident, you should stop your vehicle immediately. If possible, move the vehicle out of the way of traffic. Call the nearest police agency and ask for an ambulance, if necessary. Do not move the injured unnecessarily, but attempt to stop severe bleeding with direct pressure. Wait for emergency vehicles to arrive.

Your vehicle's brake lights indicate to other drivers that you are slowing down or stopping. Your brake lights should always be in working order when you are driving on any roadway.

To avoid becoming fatigued while taking a long trip, stop every two hours for a short break. If you become drowsy, pull off the road and park in a safe place to take a nap, or find a room to stay for the night.

Pennant-shaped signs usually indicate no passing zones. Text will also be on the sign to confirm that it is a no passing zone.

Warning signs prepare drivers for upcoming road conditions and hazards and are usually yellow with black markings. This sign warns drivers that they are approaching a T intersection and should prepare to turn either right or left.

Warning signs that indicate approaching hazards are usually yellow with black lettering or symbols. Warning signs in work zones are orange with black lettering or symbols.

Alcohol negatively affects many skills needed for safe driving, including your reaction time and ability to see clearly. It can also harm your judgment of speed and distance, lower your inhibitions, and make you more prone to taking chances.

Highway markings provide information for drivers. Markings help drivers correctly position their vehicles on roadways, inform drivers of safe passing zones, and warn drivers about upcoming conditions.

Because it is dark, drivers cannot see as well at night as they can during the day. From one half hour after sunset until one half hour before sunrise, or at any other time when persons or vehicles are not visible for 500 feet, drivers must use their headlights.

Your trailer must be equipped with safety chains. Safety chains must be attached to the frame of the towing vehicle and the trailer. They should not be connected to a part of the trailer hitch.

As a pedestrian, do not run alongside or across a street. Walk on the left side of the street, facing oncoming traffic. Always look for turning vehicles before crossing a street.

When passing a vehicle that has just parked parallel to the road, you should assume the driver will open the door as you approach. Use extra caution when driving near parked vehicles.

This sign indicates that you must keep to the right of the upcoming divider.

Fog can greatly reduce your ability to see other vehicles, pedestrians, and traffic signals. When driving in fog, drive cautiously and at reduced speeds. Do not use high beam headlights. Low beams better illuminate the road and objects ahead in foggy conditions.

Telltale signs of drunk driving include speeding, weaving, driving more slowly than the normal traffic flow, making jerking motions, and making quick and sudden stops.

You must not drive at a speed that is faster than is reasonable and prudent. You must drive at a speed that is appropriate for the area where you are driving, the type and condition of surrounding traffic, the presence of pedestrians, the weather, the quality of the road, and light conditions. You must drive within legal speed limits.

You should slow down as you enter a curve and increase your speed gradually as you exit. Increasing your speed as you enter a curve will make it more difficult to control your vehicle.

This sign indicates that there is a railroad crossing on the road ahead. You should always slow down when approaching a railroad crossing. Trains cannot yield to cars, so you must let them pass before crossing the tracks.

Warning signs are used to warn drivers about upcoming hazardous conditions and are usually yellow with black markings. This sign tells drivers that they are approaching a school zone and that they should slow down and watch for children.

Bicycles are legally considered vehicles with the same rights and responsibilities as other vehicles. Bicyclists are required to obey all traffic signs, signals, and regulations.

While it is always dangerous to drive too fast on slippery roads, this is especially true when driving in turns and curves. Be sure to approach them more slowly in slippery conditions than you would under normal circumstances.

You drive defensively when you identify dangerous driving situations and take action before an accident occurs. Defensive driving helps prevent conflicts with aggressive, offensive, discourteous, careless, inattentive, impulsive, ignorant, or intoxicated drivers or pedestrians.

This sign warns that the road is slippery when wet.

"Reduced speed ahead" signs inform drivers that they should begin to reduce the speed of their vehicles. The new speed limit will begin at the next speed limit sign.

Yellow lines separate traffic moving in opposite directions. A single dashed yellow line in the center of a road indicates that vehicles traveling in both directions are permitted to pass. Drivers may only begin a pass if they will not interfere with any oncoming traffic.

If you miss your turn or exit, do not back up or try to turn around on the highway. Go to the next exit and safely turn around.

Do not exceed the school zone speed limit during indicated times. The end of a reduced speed school zone will be indicated by an "End school zone" regulatory sign.