A traffic signal displaying a flashing yellow light indicates that you should be alert and proceed with caution. Slow down when approaching a flashing yellow traffic signal.

A five-sided yellow or yellow-green sign alerts drivers to either a school zone or school crossing.

Orange, diamond-shaped signs are used to mark construction, maintenance, survey, and utility work areas. These signs help direct drivers and pedestrians safely through dangerous zones. Fines for traffic convictions may double in areas marked by these signs.

A round sign means you are approaching a railroad crossing. This sign is posted a few hundred feet in front of the tracks and tells drivers to slow down, look, listen, and prepare to stop.

You should avoid passing other vehicles on two-lane roads. Every time you pass a vehicle, your odds of being in a collision increase.

The color orange is used only for construction and maintenance warning signs.

Where this sign is posted, it is prohibited to make a right turn. It would be unsafe and unlawful to make a right turn at an intersection with this sign.

The speed limit in Delaware school zones is 20 mph. You should be especially watchful for children near schools, near playgrounds, and in residential districts. Drive with extra caution where children are present.

You must yield the right-of-way to any emergency vehicle that is using its siren and flashing lights. Do this by driving to the right edge of the road and stopping, taking care not to stop in an intersection. You may move again after the emergency vehicle has passed.

Blood alcohol concentration (BAC) is a measure of the percentage of alcohol in a person's blood. The higher the BAC, the more impaired a person is.

Warning signs are usually yellow with black markings. This sign warns drivers about an upcoming steep hill. Drivers should slow down and be ready to control their speed and protect their brakes from damage.

Large vehicles require longer distances to stop and accelerate than smaller vehicles do. Making a sudden stop in front of a large vehicle is dangerous because the other driver may not be able to stop in time to avoid a collision.

Blue signs on the roadway are service signs. They are used to provide information about motorist services, such as upcoming rest areas, food options, or nearby hospitals.

Where there are both solid and dashed yellow lines between lanes of traffic, only traffic directly next to the dashed line may cross the centerline to pass. Drivers next to the solid line may not pass.

Use your horn to communicate with other drivers on the road. Use your horn if you are passing a driver who does not see you and is about to turn into your lane.

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

At an intersection where traffic is not controlled by traffic signal lights, drivers are required to yield the right-of-way to pedestrians within any crosswalk, marked or unmarked. Even if there is no crosswalk, yield to the pedestrian.

Airbags are important safety devices that provide protection in crashes. For best protection, a vehicle's lap and shoulder belts should be used in combination with airbags.

Pennant-shaped yellow signs like this are used to indicate a no passing zone.

Blind spots are areas that a driver cannot see if they look in their mirrors. Large trucks have large blind spots that drivers of other vehicles should avoid.

When driving at night, use your high beam headlights if you are not closely following another vehicle and there are no oncoming vehicles. High beams allow you to see twice as far as low beams. It is important to use high beams on unfamiliar roads, in construction areas, or where there may be people along the side of the road.

Warning signs are usually yellow with black markings. These signs alert drivers to areas where bicycles may be crossing.

If there is danger, you may need to sound a sharp blast on your horn. Do this when a child or any other pedestrian is about to enter into the street in front of your moving vehicle.

Rubbernecking (the practice of slowing down to look at collisions or other out-of-the-ordinary things) contributes to traffic congestion and should be avoided.

Pedestrian crosswalks are often shown by white, solid lines to emphasize pedestrian crossing points. Crosswalks may have additional lines between the white, solid lines or in place of the parallel lines. However, crosswalks may also be unmarked.

Alcohol and other drugs can negatively effect a number of skills needed for safe driving, including a driver's reaction time, coordination, alertness, and ability to concentrate.

This sign warns that a steep downgrade is ahead on the road. Drivers should check their brakes.

You must drive more slowly than usual when there is heavy traffic or bad weather. However, if you block the normal and reasonable movement of traffic by driving too slowly, you may be cited. You should match the speed of traffic, unless the speed of traffic exceeds the legal speed limit.

When passing another vehicle, move back into your original lane only when you can see the passed vehicle’s headlights in your rearview mirror. This ensures that you will have enough room to safely pull back in front of the other vehicle.

Make room for vehicles that are entering a freeway. If possible, merge into the next lane to create a gap for the incoming vehicles. If you cannot merge, adjust your speed to allow for the vehicles to enter traffic as smoothly and safely as possible.