Regulatory signs are white, rectangular signs with black markings. Drivers must obey the instructions posted on all regulatory signs. Where this sign is posted, it is prohibited for drivers to pass one another.

A solid line along the side of the road indicates where its edge is, marking the boundary between the travel lane and the shoulder. If the edge line angles toward the center of the road, this means that the road is narrower ahead.

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.

Construction, maintenance, and emergency operations signs are generally orange with black symbols.

Warning signs are usually diamond-shaped with black markings on a yellow background. They alert drivers to upcoming hazards. This sign indicates that drivers are approaching a steep hill and should prepare to adjust their speeds to continue to drive safely.

The only method that effectively reduces your BAC is to not drink alcohol for a period of time. Coffee, exercise, and cold showers cannot reduce your BAC or change the effects of alcohol. They can help you remain awake, but they cannot change your BAC or make you sober.

Warning signs are usually yellow with black markings. This sign warns drivers that the upcoming road will curve right, followed by a curve to the left. Drivers should adjust their speed to safely continue on the road.

A broken yellow line alongside a solid yellow line means that traffic in the lane next to the broken line may cross the line to pass, while traffic in the lane next to the solid line may not.

A flashing yellow traffic light indicates that you should drive with caution.

A steady yellow light on a traffic signal indicates that a steady red light will soon appear.

To turn left from multilane streets and highways, start from the left lane.

Blood alcohol content (BAC) is normally determined by a chemical test of breath, blood, urine, or saliva. However, a chemical test is not necessary to prove that you were intoxicated or impaired. The testimony of a police officer about how you were driving, or your appearance and behavior when arrested, can provide enough evidence to convict you, even without a chemical test.

Pedestrians should walk on the side of the road facing the traffic in the lane nearest them.

A flashing red light means that you must stop, yield to traffic and pedestrians, and go only when it is safe. At a railroad crossing, a flashing red light indicates that a train is approaching. Yield to the train, and go only when the lights have stopped flashing and all other active warning devices deactivate.

Warning signs provide notice to road users of a situation that might not be readily apparent and are usually yellow with black markings. This sign warns drivers to be careful when driving under wet conditions as the pavement will become slippery and more difficult to navigate safely.

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.

At a stop sign, you must stop before the stop line, if there is one. If there is no stop line, you must stop before you enter the crosswalk. If there is neither a stop line nor a crosswalk, you must stop before you enter the intersection.

Many kinds of drugs can impair your ability to drive. This includes illegal drugs and legal prescription or over-the-counter medications. It can be a criminal offense to drive while impaired by any drug.

In hazardous conditions, such as when roads are slippery or when weather is foggy, it may be necessary to drive below the posted speed limit. You can be ticketed for driving at a speed that is not reasonable for conditions, even if it's below the legal limit.

All temporary signs in work zones have an orange background with black letters or symbols. These signs are found on the right side of the road, or on both the left and right sides if the roadway is a divided highway.