• Traffic Counts
  Get traffic count information for county roads
• Speed Limits
  Find the speed limit for a county road
• Arterial Classifications
  Check the classification of a county road
• Neighborhood Traffic Safety Program
  Find out what you can do to increase traffic safety in your neighborhood
• Paint Striping
  Find out our policies for striping roads
• Marked Crosswalks
  Why we paint crosswalks at some locations and not others
• School Areas Traffic Control
  We're committed to safe and consistent school zones
• Stop and Yield Signs
  How we decide when and where to install these signs
• Traffic Signals
  Timing, Installing, Locating, Planning
• Parking
  Find out about No Parking signs

On our pages you will see many references to the MUTCD--a federal publication that Washington State has adopted as our standard. Traffic control devices include signal lights, traffic signs, and pavement markings. The MUTCD covers all aspects of the placement, construction, and maintenance of every form of approved traffic control.

The manual provides five basic requirements for all traffic control devices. Devices must:

• Fulfill a need.
• Command attention.
• Convey a clear, simple meaning.
• Command respect of road users.
• Give adequate time for proper response.

The MUTCD emphasizes 'uniformity' of traffic control devices. A uniform device conforms to the regulations for dimensions, color, wording, and graphics. The standard devices should convey the same meaning at all times. Consistent use of traffic control devices protects the clarity of their messages. As stated in the MUTCD, 'uniformity' must also mean treating similar situations in the same way.