Eight-sided traffic signs warn drivers that they must stop and yield the appropriate right-of-way at an intersection. Drivers may proceed when it is safe to do so.

You must yield the right-of-way to all emergency vehicles using a siren, air horn, and/or flashing red, blue, or white lights. Where possible, you must pull over to the right edge of the road. If you are in an intersection, drive through the intersection before you pull over.

If you hear the siren or see the flashing lights of an emergency vehicle, you must slow down, provide a clear path for the vehicle, and stop. Don't try to outdrive the emergency vehicle.

This sign marks parking spaces that are reserved for people with disabled parking permits.

A flashing red light means the same thing as a stop sign. If you encounter a flashing red light, you should come to a complete stop, yield to appropriate traffic and pedestrians, and only proceed when it is safe to do so.

You must yield to other drivers when entering a street from an alley, driveway, or garage. You must also yield to pedestrians who are on an intersecting sidewalk.

Warning signs are usually diamond-shaped with black markings on a yellow background. They alert drivers to upcoming hazards. This warning sign indicates that a traffic signal is ahead and drivers should prepare to react to a yellow or red light.

Before you drive, always fasten your seat belt and make sure all your passengers are using seat belts or child restraints. Studies have shown that if you use seat belts, your chances of being hurt or killed in a traffic crash are greatly reduced. Children age 12 and under should always ride properly restrained in a rear seat. Never put a rear-facing infant restraint in the front seat of a vehicle with a front passenger airbag.

A solid line along the side of the road indicates where its edge is, marking the boundary between the travel lane and the shoulder. If the edge line angles toward the center of the road, this means that the road is narrower ahead.

Some regulatory signs prohibit certain actions. These signs are rectangular and white with red and black markings. A red circle and slash on top of a black symbol indicates that the specified action is forbidden.

This sign is used with a traffic signal to tell drivers that left-turning traffic does not have the right-of-way and must instead wait for oncoming traffic to clear.

If you are entering traffic from a driveway or private road, you should yield to drivers already on the public road. Merge safely into traffic when you are able to do so.

A red traffic light means that you must stop before entering the intersection. You must at any stop line and before entering any crosswalk.

If you are on an entrance or acceleration ramp and are entering interstate traffic, you should yield to drivers already on the interstate highway. Merge safely into traffic when you are able to do so.

Always stop before entering the roadway from a driveway and yield to any approaching vehicles or crossing pedestrians. The stop should be made before crossing the sidewalk area. Failure to stop is unlawful.

When making a left turn where there is approaching traffic, you must wait for the approaching traffic to go through before you turn. You may enter the intersection to prepare for your left turn if the light is green and no other vehicle ahead of you plans to make a left turn.

When using a freeway exit ramp, do not slow down until you move onto the exit ramp.

Don’t make a last-minute turn into an exit. If you pass your exit, you must go to the next one.

Alcohol is a depressant drug that slows the activity of the brain and reduces the skills that you need for safe driving. Drinking alcohol results in slowed reaction time and impaired judgment.

An octagonal shape is used only for stop signs. All eight-sided signs tell drivers to come to a complete stop before proceeding.

When you park on a downward-facing slope, turn your wheels sharply toward the side of the road. This way, if your vehicle starts to roll downhill, it will roll away from traffic.

In Missouri, it is illegal for a driver age 21 or older to operate a motor vehicle with a BAC of 0.08 percent or more. It is illegal for a driver under the age of 21 to operate a motor vehicle with a BAC of 0.02 percent or more. Being convicted of Driving While Intoxicated (DWI) may result license suspension or revocation.

As alcohol builds up in your system, it will slow your reactions, make you feel more confident, and cause you to make more errors.

Do not drive in someone else’s blind spot. Move forward or drop back so that the other driver can see you.

Warning signs are usually diamond-shaped and yellow with black lettering or symbols. They warn drivers about special situations or potential hazards ahead.