Warning signs are used to warn drivers about upcoming hazardous conditions and are usually yellow with black markings. This sign tells drivers that they are approaching a school zone and that they should slow down and watch for children.

Use your right foot for both braking and accelerating. You should apply the brakes gently with increasing pressure so that your vehicle stops gradually and smoothly.

You should increase your following distance when you are behind a large vehicle that blocks your vision, when driving in bad weather or heavy traffic, when exiting an expressway, when behind a motorcycle or bicycle, and if someone is tailgating you.

After yielding the right-of-way to traffic within an intersection or crosswalk, a driver may go in the direction a green arrow is pointing, regardless of other lights present.

This sign warns that the overpass ahead has a low clearance. Do not proceed if your vehicle is taller than the height indicated (in this case, 13 feet, 6 inches).

When driving under snowy or icy conditions, you should make speed and directional changes gradually. Never use cruise control when driving on snow or ice because your tires may lose contact with the road and you will lose control of your vehicle.

Construction and maintenance signs are orange-colored and are used to notify drivers of unusual or potentially dangerous conditions in or near work areas. This sign warns drivers that they are approaching a construction zone and that they should prepare to lower their speed and drive with extraordinary caution.

This sign warns of a dangerous downgrade or hill ahead. The hill may be very long or steep, or it may have sharp curves.

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

When changing lanes, look over your shoulder in the direction you plan to move. Check for obstructions near the rear corners of your vehicle. These areas are called “blind spots” because you cannot see them by using your mirrors.

Consuming both alcohol and another drug may enhance the effects of both. For example, taking one drink when you are also using a cold remedy could affect you as if you have had several drinks.

When driving near a blind pedestrian who is carrying a white cane or walking with a guide dog, you must slow down, yield the right-of-way, and then proceed with caution. Be prepared to stop your vehicle in order to prevent injury or danger to the pedestrian.

This sign provides advance warning that bicycles may be present.

If you notice that the road ahead is covered by heavy smoke, reduce your speed immediately, drive as far as possible to the right, and stop off the roadway. Only then should you determine if it is safe for you to continue. Remember that certain kinds of smoke can irritate your eyes and lungs or even kill you.

When changing lanes, you must be sure that there are no vehicles in the space you want to enter. Check for other vehicles behind and to the side of your vehicle by checking your mirrors and blind spots. Always use the proper turn signal before changing lanes to allow surrounding vehicles time to react to your movements.

Any eight-sided sign is a stop sign. At an intersection with a stop sign, you must stop completely and check for pedestrians and cross traffic in the intersection. Wait for the intersection to clear before proceeding.

Any time you want to change lanes, you should properly signal your intentions well in advance, check your mirrors, and check your blind spot. You can check your blind spot by glancing over your shoulder in the direction that you plan to move.

Continuous hard braking on snow and ice can result in the locking of the front brake, causing a loss of steering. To avoid the need for excessive braking, make sure to maintain an appropriate speed for conditions.

Octagonal signs are always stop signs. Come to a complete stop when approaching a red, eight-sided sign.

A motorcycle is a full-size vehicle with the same privileges as any other vehicle on the roadway. You should allow a motorcyclist a full lane width. Although it may seem as though there is enough room in the traffic lane for a larger vehicle and a motorcycle, remember that the motorcycle needs room to maneuver safely.

This signs indicate that U-turns are prohibited in the location where it is posted.

While it is not advisable to drive in fog, if you must drive in foggy conditions, you should drive with the headlights set on dim or use fog lights.

You must have evidence of financial responsibility, such as proof of insurance, with you whenever you drive. You must always show proof of insurance and your license to an officer upon request after a traffic stop or collision.

Both hands should be placed on opposite sides of the steering wheel. This position is comfortable and promotes safe turning on high-speed roadways.

If there is an available passing lane, you may pass on the right of a vehicle or bicycle that is turning left or waiting to turn left. It is also legal to pass on the right when driving on a multilane road with two or more lanes traveling in the same direction. You may never drive off the pavement or main-traveled portion of the road to pass another vehicle.

When changing lanes or turning, signal your intentions well in advance. The law requires that you signal for at least 100 feet before you move your vehicle to the right or left. Before pulling away from a curb, always signal to inform passing drivers of your intentions.

The posted maximum speed limit is the fastest legal driving speed in an area, under ideal conditions. You must reduce your speed when conditions require it, such as when the roadway is slippery or when it is difficult to see clearly down the road.

It is unlawful for any driver in Iowa to read, write, or send a text message while driving. Before using an electronic communication device to write, send, or read a text message, a driver must safely bring their vehicle to a complete stop off the traveled portion of the roadway.

Motorcycles are smaller and harder to see than cars. Because of their size, they are easily hidden in a car’s blind spot. It may be difficult to judge your distance to a motorcycle and difficult to tell how fast a motorcycle is moving, so always be alert and extra cautious when near a motorcyclist.

A white rectangular sign indicates that you must obey the stated rule. This sign means that drivers should not pass other vehicles for any reason.

You should always signal when turning, changing lanes, slowing down, or stopping so that other drivers, motorcyclists, bicyclists, and pedestrians will know your intentions.

Not getting enough sleep is a cause of poor driving behavior. Just like drugs and alcohol, sleepiness slows reaction time, decreases awareness, and impairs judgment.

You are required to stop at all railroad crossings when signals warn of an approaching train. These signals may include flashing red lights, a lowered crossing gate, a flagger signaling, or a train’s audible signal of warning. Do not attempt to go around a lowered gate.

Any amount of alcohol acts as a depressant, slowing the function of the nervous system. It will reduce a person's alertness and ability to concentrate, increase their reaction time, and drastically reduce their coordination.

It is illegal to drive under the influence of any substance that impairs your ability to drive safely. This includes alcohol, prescription medications, over-the-counter medications, and illegal drugs.