At a yield sign, you must slow down or stop, if necessary, and give the right-of-way to crossing or merging vehicles. Yield the right-of-way to any cross traffic that is close enough to cause conflict.

This sign indicates that the right lane on a multilane roadway ends ahead. Traffic in the right lane must merge left.

You should always change lanes gradually and carefully. Only change lanes when necessary. Every lane change increases the possibility of a traffic accident.

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.

Vehicles, occupied or not, may not stand or park within five feet of an alley entrance, public driveway, or private driveway.

Pumping the brakes is generally the best way to stop a car in an emergency. The car will stop quickly and you will also be able to continue steering.

Regulation signs regulate traffic speed and movement, displaying rules which drivers must obey. This sign tells drivers the direction in which they must drive when turning onto a one-way street.

If you are being tailgated by another driver and there is a right lane, move over to the right. If there is no right lane, wait until the road ahead is clear and then reduce your speed slowly. This will encourage the tailgater to drive around you. Never slow down abruptly as this will only increase the risk of your vehicle being hit from behind.

When entering a roundabout, you must yield to pedestrians, bicyclists, and vehicles that are already in the roundabout.

This sign indicates that the road ahead curves to the right.

A green arrow displayed on a traffic signal tells drivers that they may turn in the direction of the arrow. You must be in the proper lane for such a turn. Yield the right-of-way to vehicles and pedestrians already in the intersection.

The presence of solid or broken lane markings down the center of a road is the best indication of whether or not passing is permitted in an area. On a two-lane highway, you may not pass another vehicle if your lane is directly next to a solid line. You may not pass within 100 feet of an intersection.

Before you return to your driving lane, be sure you are not dangerously close to the vehicle you have just passed. One way to do this is to look for the vehicle in your inside rearview mirror. When you can see both headlights in your rearview mirror, you may have enough room to return to your driving lane.

It is illegal to make a left turn on a red traffic signal in the District of Columbia. You may make a right turn on a red traffic light where permitted.

The slow-moving vehicle symbol is a reflective orange triangle. Expect vehicles using this emblem to be driving at speeds of 25 mph or slower.

Crashes often happen because one driver does something that other road users are not expecting. You should communicate with other motorists, bicyclists, and pedestrians by doing things like signaling when slowing down, stopping, or changing direction. Use your emergency signals or horn when appropriate.

Before you drive, always fasten your seat belt and make sure all your passengers are using seat belts or child restraints. Studies have shown that if you use seat belts, your chances of being hurt or killed in a traffic crash are greatly reduced. Children age 12 and under should always ride properly restrained in a rear seat. Never put a rear-facing infant restraint in the front seat of a vehicle with a front passenger airbag.

When parking uphill on a road that has a curb, your wheels should be turned away from the curb. When parking uphill on a street without a curb or when parking downhill, your wheels should be turned toward the curb or edge of the road.

Signs that are brown indicate areas of cultural and historical significance or of public recreation. They can be a helpful resource when traveling in unfamiliar locations.

Bicycles do not have turn signals so bicyclists use hand and arm signals to alert other drivers to their intentions. If a bicyclist puts their left arm straight out, they are signaling that they intend to turn left.

This sign warns of two-way traffic ahead.

If your vehicle begins to skid, do not use the brakes. Braking could make the skid worse.

You must always yield the right-of-way to pedestrians. Be aware of the possibility that pedestrians may misjudge traffic signals and cross against a light.

This sign warns that two lanes of traffic going the same direction will soon merge into one lane.

When approaching a railroad crossing, you must look, listen, slow down, and prepare to stop. Let any trains pass before you proceed.