Traffic Laws Practice Test

Explanation: The correct hand signal for a left turn is to extend your left arm straight out horizontally from the driver's side window.

Explanation: The 'Implied Consent' law states that by operating a motor vehicle on public roads, you automatically consent to a chemical test (blood, breath, or urine) to determine your blood alcohol concentration (BAC) if arrested for suspected DUI/DWI. Refusal to take the test can result in penalties such as license suspension.

Explanation: A 'Yield' sign means you must slow down and be prepared to stop if necessary to allow traffic already in or approaching the intersection to proceed. You must give the right-of-way to other vehicles and pedestrians.

Explanation: A yellow diamond-shaped sign with a curved arrow is a warning sign indicating a curve ahead. The direction of the arrow shows the direction of the curve.

Explanation: While specific speed limits can vary by state and local ordinances, a common maximum speed limit in residential areas in the U.S., unless otherwise posted, is 25 mph. Always look for posted signs, as these take precedence.

Explanation: A broken yellow line alongside a solid yellow line means that passing is permitted only for traffic on the side with the broken line. Traffic on the side with the solid line is prohibited from passing.

Explanation: A red and white regulatory sign with a white diagonal line (often seen on a circle) indicates that something is prohibited or not allowed. For example, a 'No U-Turn' sign or a 'No Parking' sign.

Explanation: You must dim your high-beam headlights when you are within 500 feet of an oncoming vehicle or within 200-300 feet (depending on state law) of a vehicle you are following. This prevents blinding other drivers.

Explanation: A flashing yellow light means you should slow down, proceed with caution, and be prepared to stop if necessary. It does not mean you have the right-of-way without checking for cross-traffic.

Explanation: Under ideal driving conditions, the recommended minimum safe following distance is three to four seconds. This allows enough time to react and stop safely if the vehicle in front suddenly brakes. This distance should be increased in adverse conditions.

Explanation: U-turns are generally permitted only when they can be made safely, without interfering with other traffic, and when there are no signs prohibiting them. They are typically illegal on curves, hills, or where visibility is limited, and often near intersections with traffic lights.

Explanation: In most U.S. states, texting while driving is illegal. It is a dangerous distraction that significantly increases the risk of accidents. It is only permissible when the vehicle is safely parked or in an emergency situation where hands-free operation is not possible.

Explanation: If your vehicle starts to hydroplane, you should ease your foot off the accelerator, keep the steering wheel straight, and avoid braking suddenly. Allow the vehicle to slow down naturally until the tires regain traction.

Explanation: In most states, a left turn on a red light is permitted only when turning from a one-way street onto another one-way street, after coming to a complete stop and yielding to all traffic and pedestrians.

Explanation: Driving in a bicycle lane is typically prohibited, except for specific circumstances such as making a right turn (where you may enter the lane a short distance before the turn), parking (if permitted), or to avoid an obstruction. It is not for general travel or passing.

Explanation: Flashing red lights at a railroad crossing indicate an approaching train. You must stop at least 15 feet but no more than 50 feet from the nearest rail and wait until the train has passed and the lights stop flashing before proceeding.

Explanation: You must stop for a school bus with flashing red lights and an extended stop arm, regardless of your direction of travel, unless you are on a divided highway with a physical barrier between your lane and the bus. All lanes of traffic traveling in the same direction as the bus must stop.

Explanation: When an emergency vehicle with flashing lights and sirens approaches, you must safely move to the right-hand edge or curb of the roadway and stop. Remain stopped until the emergency vehicle has passed.

Explanation: The 'No-Zone' refers to the blind spots around large trucks where the truck driver cannot see other vehicles. These blind spots are located directly in front, directly behind, and on either side of the truck. Driving in these areas increases the risk of a collision.

Explanation: A solid white line on the right edge of the highway is a fog line or shoulder line. It indicates the outer boundary of the drivable roadway and should not be crossed unless absolutely necessary, such as for an emergency stop.

Explanation: The primary purpose of a seat belt is to keep the occupant securely in their seat during a collision or sudden stop, preventing them from being ejected from the vehicle or striking the interior of the vehicle.

Explanation: White rectangular signs with black lettering are regulatory signs. They provide specific instructions or laws that drivers must obey, such as speed limits, 'No Parking' signs, or 'One Way' signs.

Explanation: A green arrow displayed with a red traffic light means that you may proceed cautiously in the direction of the arrow, even though other traffic facing a red light must stop. You must yield to any pedestrians or vehicles already in the intersection.

Explanation: If you miss your exit on a freeway, you should continue to the next exit. It is dangerous and illegal to stop, back up, or try to cross multiple lanes to get back to a missed exit.

Explanation: In all U.S. states, the legal limit for Blood Alcohol Concentration (BAC) for drivers aged 21 and over is 0.08%. Driving with a BAC at or above this limit is considered driving under the influence (DUI) or driving while intoxicated (DWI).

Explanation: Passing on the right is generally allowed only when the vehicle ahead is making a left turn and there is sufficient pavement width to do so safely, or on roads with two or more lanes traveling in the same direction. It is illegal and unsafe to pass on the right by driving off the paved portion of the road.

Explanation: The 'Move Over' law requires drivers to move over a lane, if safe to do so, or slow down when approaching a stopped emergency vehicle, tow truck, or road assistance vehicle with flashing lights on the side of the road. This protects emergency personnel and others working on the roadside.

Explanation: When parking uphill with a curb, you should turn your front wheels sharply away from the curb. This way, if your brakes fail, the vehicle will roll back into the curb and stop, rather than rolling into traffic.

Explanation: Headlights must be used from a half-hour after sunset to a half-hour before sunrise, and at any other time when visibility is limited to 500 feet or less, or when windshield wipers are in continuous use due to rain, snow, or fog.

Explanation: A solid yellow line on your side of the center line indicates that passing is prohibited for traffic in your lane. You must not cross this line to pass another vehicle.