Delaware CAR DMV Practice Test 21

Only the passage of time can remove alcohol and its impairing effects from the body.

Drivers of trucks, buses, vans, and any vehicles pulling campers or trailers may not be able to see you if you are driving directly behind them. Increase your following distance when driving behind one of these vehicles. Additionally, large vehicles can block your view of the road, so increase your following distance to look around the sides of the vehicle and see the road ahead.

A steady green traffic light indicates that the driver may continue through the intersection. The driver should yield to traffic or pedestrians already in the intersection and proceed when the intersection is clear.

If you are being followed too closely by another driver, merge into a different lane. If there is no lane available for merging, wait until the road ahead is clear and slowly reduce your speed. This will encourage the tailgater to drive around you.

A five-sided sign is used to alert drivers to a school zone. Some pentagonal signs specifically indicate crosswalks within school zones where children or other pedestrians may be present.

Warning signs are usually yellow with black markings. This sign indicates that a divided highway is beginning and cars should keep to the right.

The posted maximum speed limit is the fastest legal speed you can travel on a road under ideal conditions. It is safest to drive at the same speed as surrounding traffic, up to the maximum speed limit. Maintaining a safe speed at all times is a responsibility shared by all motorists.

This sign indicates that the road may be slippery when wet. Exercise caution when driving on a slippery road.

A single broken line indicates that drivers may cross from either lane to change lanes. Dashed yellow lines alongside solid yellow lines indicate that passing is permitted from the lane next to the broken line, but not from the lane next to the solid line. Only change lanes when it is safe to do so.

If any person is injured or killed in a traffic accident, the police must be immediately notified. It is a crime for you to leave the scene of such an accident before the police have talked to you and gotten all the information they need.

If you begin to skid on a wet or icy road, take your foot off the accelerator, stay off the brakes, and turn your steering wheel in the direction of the skid. However, if you have anti-lock brakes, you should apply your brakes firmly and steer straight ahead.

An octagonal sign always means stop. When approaching a stop sign, you must come to a complete stop at the marked stop line and proceed only when it is safe to do so. If there is no stop line, stop before the crosswalk. If there is no crosswalk, stop before the intersection at a point from which you can see any oncoming traffic.

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.

Your emotions affect your ability to drive safely. If you are overly angry, excited, afraid, worried, or depressed, you should give yourself time to calm down before operating a vehicle. You need to be able to mentally focus on driving without thinking about the things that made you upset.

Diamond-shaped signs are used to warn of actual or possible hazards. The color orange is used for warning signs usually found in construction or maintenance areas.

While airbags provide supplemental protection for adults in the event of a crash, they pose a severe safety risk for children. Anyone age 12 or under should sit in the back seat of a vehicle with airbags.

You must come to a complete stop at a steady or flashing red traffic light. You must always obey instructions given by officers directing traffic, regardless of any posted signs or traffic signals.

The stop sign is the only eight-sided sign you will see on any roadway. When you encounter a stop sign, you must come to a complete stop. You may not proceed until the way is clear for you to completely and safely pass through the intersection.

When turning, you should look to the rear and both sides of your vehicle to ensure it is safe to proceed before making the turn. Adjust your speed to safely complete the turn.

A triangular yellow sign with black lettering indicates a no passing zone. It will appear on the left side of a two-way, two-lane roadway at the beginning of an area where prohibitive pavement markings are also used.

When driving in a work zone, keep a safe distance between your vehicle and traffic barriers, trucks, construction equipment, workers, and other vehicles. Increase your following distance and do not tailgate.

Warning signs are usually yellow with black markings. They alert you to conditions that are immediately ahead. This sign warns drivers that the number of lanes is reduced ahead and that traffic should merge left.

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.

Drivers turning left must yield to oncoming vehicles that are driving straight ahead. A turning driver may only proceed when they can safely turn without affecting oncoming traffic.

When backing up, place your right arm on the back of the passenger seat and look directly through the rear window. Do not depend on your rearview or side mirrors as mirrors do not show directly behind your vehicle. Only drive in reverse at a low speed.

You must turn on your headlights any time conditions prevent you from seeing other vehicles. Other drivers may have trouble seeing you, too.

The only way to sober up after drinking alcohol is to allow time for your body to eliminate the alcohol in your system. Nothing you can do, including eating and drinking, can accelerate this process.

You may turn left onto a one-way street that moves to the left if there is no sign prohibiting the turn. You may not turn left onto a one-way street where traffic moves to the right.

This sign indicates that there is a crossroad ahead.

You must yield the right-of-way to any emergency vehicle that is using its siren and lights. Drive to the right edge of the road and stop until the emergency vehicle has passed. If you are within an intersection, drive through the intersection first and then stop.