In the past, some agencies have posted "Children at Play" signs in residential areas; however, no evidence documents their success in reducing accidents or operating speeds. Children should not be encouraged to play within the roadway. The sign has long been rejected since it is a direct and open suggestion of unsafe activity and behavior. Today, Texas and federal standards prohibit the use of "Children at Play" signs. Specific warning signs for schools, playgrounds, parks and other recreational facilities are available for use.