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2007 King County Road Design and Construction Standards
The update to the 1993 King County Road and Design Standards has been approved. The 2007 Update includes new road design and construction requirements and practices, and complies with current storm water management, environmental policies, state and federal requirements, and the County's Comprehensive Plan.
›› 2007 King County Road Design and Construction Standards (Complete document including figures, 8MB .pdf )
›› 2007 King County Road Design and Construction Standards
(Version with figures linked separately below, 2MB .pdf )
Figures:
Key elements of the update are:
- Incorporates current design and construction standards.
- Strengthens public safety requirements, includes additional sidewalk requirements, and places greater emphasis on replacement of utility structures within the right of way.
- Strengthens requirements to reduce construction impacts on road users, including road closures, and detours.
- Supports King County’s Comprehensive Plan, Critical Areas Code, Surface Water Manual, and applicable federal and state regulations.
- Updates and clarifies Americans with Disabilities Act (ADA) standards.
- Clarifies and modifies bikeways and equestrian standards.
- Reinforces authority and duties of inspectors and quality control.
- Reduces roadway width on local rural roads.
- Improves street tree and landscaping criteria.
- Includes provisions for low impact development.
- Provides user-friendly document improvements and includes drawings illustrating many of the design requirements.
CAD files:
The following CAD file drawings are made available in DWG TrueView™ format. You can use this free download to
accurately view, plot, and publish authentic DWG and DWF files.
Section 2-000 Roadway
Section 3-000 Curbs, Curb Ramps, Sidewalks, Driveways and Trails
Section 4-000 Channelization
- 4-001 through 4-009 (469KB .dwg)
4-001 Pavement Markings
4-002 Intersection Approach Striping
4-003 Pavement Symbols
4-004 Raised Pavement Markers
4-005 Merge and Dual Turn Lane
4-006 Bike Lane and Right Turn Drop
4-007 Bike Lane and Right Turn Pocket
4-008 Left Turn Lanes
4-009 Median Islands
Section 5-000 Roadside Appurtenances
Section 7-000 Drainage
Also see: King County 1993 Road Standards
Updated: July 12, 2007
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