The standard traffic warning signs in the United States are well-standardized. However, you will encounter some unusual signs if you drive on private property. 

Do Not Enter

A do not enter traffic warning sign is a regulatory sign that states that drivers should not enter the area in which it is posted. This sign is usually placed in an area with opposing traffic, a vehicle coming toward the driver. If a driver were to enter the area where a do not enter sign is posted, it could result in a serious collision. The purpose of these signs is to prevent head-on collisions. A DO NOT ENTER sign is often placed on a parking lot, underpass, or tunnel entrance.

Stop Sign

The standard traffic warning signs Washington and in all parts of the country are signs in a roadway that say something about the traffic flow in the area. These signs are also used in conjunction with other warning signs, such as stop signs and yield signs. The following explanations will provide some information on how these signs function. These signs are meant to make drivers aware of upcoming dangers and should be heeded when necessary.

Stop signs require drivers to come to a complete stop, yield to traffic, and stop for at least two seconds. Yield signs are designed to alert drivers to stop for pedestrians or vehicles. They also have flashing yellow lights to warn drivers of potential hazards.

Do Not Pass

A Do Not Pass traffic sign warns motorists not to pass through an area that may be hazardous. It warns of possible unseen hazards and protects both motorists and pedestrians. This sign can be used in public places, such as parking lots, to warn motorists that they should not pass through the area. Some examples of such signs include median warning signs. These are usually seen when a two or four-lane road merges with a divided highway. Drivers may need to swerve to the right when the roadway divides briefly. 

Do Not Enter With A Flashing Yellow Light.

A flashing yellow light indicates that you should proceed cautiously through an intersection. These lights are present at many busy intersections. During construction or after a power outage, the lights may not work. When they do, they run on their default program, which is to give more caution to drivers in a busier intersection than one with less traffic. The flashing yellow signal means that you should proceed slowly and cautiously and proceed only when there is plenty of room to move.

Do Not Pass With The Circular Red Arrow.

If you are driving on a road that contains circular red arrow traffic warning signs, you need to be very careful when passing. These signs are usually located near intersections. When drivers pass these signs, they are not allowed to pass on the left. Sometimes, these signs will be accompanied by a yellow pennant-shaped sign or a NO PASSING ZONE sign. In other situations, the arrows might be accompanied by an animal that is common in the neighborhood. This animal may be crossing the road, especially at night. In some cases, they will also indicate a roundabout or a change in the speed limit. In these cases, drivers should slow down and yield to the traffic at the roundabout or intersection.