Slow children at play signs are commonly used where young kids gather, such as parks, playgrounds and residential neighborhoods.

Yield signs help slow down traffic and are placed in areas where danger of a traffic collision may be present, such as when two lanes merge into one.

School speed limit signs near campus can help drivers know when they approach a school to slow down and watch out for pedestrians and bicyclists.

Slippery when wet signs are necessary to remind others of when water could create a safety hazard, such as on winding roads and on wet floors.