You should allow more space in front of your vehicle than usual when you are stopped on an uphill slope. If the vehicle in front of you rolls backward toward your vehicle when traffic begins to move again, it is less likely that there will be a collision.

Regulatory signs provide notice to road users of traffic laws that must be obeyed. This particular sign tells you the maximum speed limit for the stretch of highway where it is posted. You may drive more slowly than the posted speed limit, based on road conditions, but it is illegal to drive any faster than the posted speed limit.

When a school bus is stopped on the road ahead with its lights flashing and its stop arm extended, you must come to a complete stop and wait to proceed until the lights have stopped flashing and the stop arm is withdrawn. Even after the bus begins to move again, do not proceed until you are sure there are no children crossing the road ahead of you.

This sign provides advance warning that bicycles may be present.

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.

A steady yellow light indicates that a steady red light will soon appear. If you are driving toward an intersection and a yellow light appears, slow down and prepare to stop. If you are already within the intersection or cannot stop safely before entering the intersection, continue through carefully.

A flashing yellow light warns of a hazard. Slow down and proceed with caution.

Crosswalk lines show pedestrians where to safely cross a road or street. Crosswalks may be marked by horizontal lines, vertical lines, or a combination of the two. You must always stop for pedestrians who are in a crosswalk.

It is always unlawful to exceed the posted speed limit, even when passing another vehicle.

This sign indicate that the right lane ends ahead.

A "No standing" sign means that you may only make a temporary stop to load or discharge passengers.

If you come across a "No passing zone" sign, it is not legal to pass in the indicated area. You are likely driving in an area with restricted visibility where it would be unsafe to pass another vehicle.

All bicyclists have the same rights, duties, and responsibilities as drivers of motor vehicles. Motorists and bicyclists who do not obey traffic laws can be ticketed.

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 winding road and that they should adjust their speed accordingly.

If you are 18 years of age or older, you may choose to become an organ and tissue donor when obtaining your driver license. If you are a male between the ages 18 and 25, the DC DMV will register you with Selective Service unless you use a waiver form to opt out. If you are a citizen of the United States who will be at least 18 years of age by the time of the next election, you may register to vote or update your registration.

Before passing another vehicle, check your mirrors and blind spots. Before changing lanes, activate the appropriate turn signal. Re-enter the lane when you can see the front of the passed vehicle in your rearview mirror.

Warning signs prepare drivers for upcoming road conditions and hazards and are usually yellow and black. This sign tells drivers that a lane is ending and that they should prepare to allow traffic to merge safely.

When driving near heavy trucks, other drivers and highway users must make allowances for the increased stopping distance required by the large vehicles. Drivers of smaller vehicles should remain in locations where they can be seen by the driver of the large vehicle and where their view of traffic is not blocked by the vehicle.

When driving to an unfamiliar area, plan your trip in advance. Don’t start with only a hazy idea of where you are going. If your destination is in an unfamiliar area, check the location on a map before you start to drive.

You should never change lanes within an intersection. Before changing lanes, always look over your shoulder to check your blind spot. Be alert to other drivers moving into the same 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.

Drivers are always required to stop for a stopped school bus when driving on a two-lane road, regardless of their direction of travel. You should exercise caution when driving near children.

Alcohol takes effect quickly and is slow to leave your system. Cold showers, black coffee, and exercise will do nothing to reduce a person's blood alcohol content (BAC). The only way to lower your BAC is to wait.

Warning signs are usually diamond-shaped with black markings on a yellow background. They alert drivers to upcoming hazards. This sign warns drivers to be extra careful when the pavement is wet because the road may become slippery, making vehicles more difficult to control.

White lines separate traffic lanes traveling in the same direction. You may cross broken white lines to pass, as long as the passing lane is clear.