The purpose of traffic control devices, as well as the principles for their use, is to promote highway safety and efficiency by providing for the orderly movement of all road users on streets and highways throughout the city.
Traffic control devices, in this case, street signs, notify road users of regulations and provide warning and guidance needed for the reasonably safe, uniform, and efficient operation of all elements of the traffic stream.
Renton staff follow the guidelines of the US DOT Federal Highway Administration as published in the Manual on Uniform Traffic Control Devices.