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 )

• Chapter 2 (363KB .pdf)
• Chapter 3 (836KB .pdf)
• Chapter 4 (241KB .pdf)
• Chapter 5 (834KB .pdf)
• Chapter 7 (2MB .pdf)

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.

• 2-001 Rural Type Roadway (214KB .dwg)
• 2-002 Vertical Curb Type Roadway (209KB .dwg)
• 2-003 Rolled Curb Type Roadway (266KB .dwg)
• 2-004 Gravel Surface Roadway (189KB .dwg)
• 2-005 Extruded Curb Roadway (248KB .dwg)
• 2-006 Cul-de-Sacs (214KB .dwg)
• 2-007 Temporary Cul-de-Sac (220KB .dwg)
• 2-008 Urban/Rural Eyebrow (228KB .dwg)
• 2-009 Half Street (218KB .dwg)
• 2-010 Alley Pavement Detail (244KB .dwg)
• 2-011 Hammerhead Turnaround (206KB .dwg)
• 2-012 Measuring Sight Distance (208KB .dwg)
• 2-013 Intersection Landing (186KB .dwg)

• 3-001 Curb and Sidewalk Joints (242KB .dwg)
• 3-002 Curb Details (248KB .dwg)
• 3-003 Shoulder and Ditch Section Driveway (284KB .dwg)
• 3-004 Residential Driveway Approach - Urban (284KB .dwg)
• 3-005 Commercial/Industrial Driveway Approach - Routed Sidewalk (240KB .dwg)
• 3-006 Commercial/Industrial Driveway Approach - Routed Sidewalk, Planting Strip (232KB .dwg)
• 3-007 Commercial/Industrial Driveway Approach, Parallel Sidewalk (245KB .dwg)
• 3-008 Location and Width of New Driveways (236KB .dwg)
• 3-009 Joint Use Driveway Tract (198KB .dwg)
• 3-010 Curb Ramp Locations (214KB .dwg)
• 3-011 Curb Ramp 1A (272KB .dwg)
• 3-012 Curb Ramp Type 1B (261KB .dwg)
• 3-013 Curb Ramp Within Radius (267KB .dwg)
• 3-014 Cement Concrete Sidewalk Transition to Asphalt Shoulder (211KB .dwg)
• 3-015 Curb Ramp 2A, 2B Alternative (328KB .dwg)
• 3-016 Typical Intersection Plan with Asymmetrical Lanes (227KB .dwg)
• 3-017 Preferred Equestrian Trail Easement Adjacent to Public Street (288KB .dwg)
• 3-018 Shared Use Trails, Paved Tread, Double Track (482KB .dwg)
• 3-019 Shared Use Trails, Natural Tread, Double Track (325KB .dwg)
• 3-020 Limited Use Trails, Paved Tread, Single Track (280KB .dwg)
• 3-021 Bikeways (431KB .dwg)

• 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

• 5-001 Clearance of Roadside Obstacles on Shoulder Type Road (188KB .dwg)
• 5-002 Roadway Barricades (276KB .dwg)
• 5-003 Rock Facing, Cut Section (425KB .dwg)
• 5-004 Rock Facing, Fill Section (330KB .dwg)
• 5-005 Rock Facing, Under Sidewalk (357KB .dwg)
• 5-006 Rock Facing, Fill Section Reinforcement (396KB .dwg)
• 5-007 Concrete Steps and Metal Handrail (332KB .dwg)
• 5-008 Metal Handrail (315KB .dwg)
• 5-009 Street Tree Location (352KB .dwg)
• 5-010 Tree Setbacks/Blockouts/Rock Facings (234KB .dwg)
• 5-011 Tree Planting in Planting Strips (301KB .dwg)
• 5-012 Larger Fills Around Trees (331KB .dwg)
• 5-013 Minor Fills Around Trees (249KB .dwg)
• 5-014 Mailbox Installation Type 1 & 2 (1 of 4) (265KB .dwg)
• 5-015 Mailbox Installation Type 1 & 2 (2 of 4) (347KB .dwg)
• 5-016 Mailbox Installation Type 1 & 2 (3 of 4) (407KB .dwg)
• 5-017 (NDCBU) Mailbox Installation Neighborhood Delivery and Collection Box Unit (4 of 4) (229KB .dwg)
• 5-018 Bollards (290KB .dwg)
• 5-019 Roadway Survey Monument with Case & Cover (292KB .dwg)
• 5-020 Off-Roadway Survey Monument (391KB .dwg)
• 5-021 Transverse Joint Planing (257KB .dwg)

• 7-001 Beveled End Pipe Section (249KB .dwg)
• 7-002 Field Tapping of Concrete Pipe (355KB .dwg)
• 7-003 Catch Basin Type 1 (253KB .dwg)
• 7-004 Catch Basin Type 1-L (251KB .dwg)
• 7-005 Catch Basin Type 2 - 48", 54", 60", 72" and 96" (346KB .dwg)
• 7-006 Catch Basin Details (229KB .dwg)
• 7-007 Manhole Type 1 - 48", 54" and 60" (287KB .dwg)
• 7-008 Manhole Type 2 - 72" & 96" (294KB .dwg)
• 7-009 Manhole Type 3 - 48", 54", 60", 72" and 96" (368KB .dwg)
• 7-010 Manhole Type 4 (219KB .dwg)
• 7-011 Manhole Details (236KB .dwg)
• 7-012 Curb Inlet (276KB .dwg)
• 7-013 Standard Grate (222KB .dwg)
• 7-014 Standard Frame with Vertical or Extruded Curb Installation (271KB .dwg)
• 7-015 Solid Cover (261KB .dwg)
• 7-016 Through-Curb Inlet Frame (242KB .dwg)
• 7-017 Through-Curb Inlet Frame and Grate with Vertical Curb Installation (275KB .dwg)
• 7-018 Vaned Grate (223KB .dwg)
• 7-019 Rolled Curb Frame and Grate (252KB .dwg)
• 7-020 Rolled Curb Frame and Grate Installation (266KB .dwg)
• 7-021 Rolled Curb Vaned Grate (226KB .dwg)
• 7-022 Locking Manhole Cover (246KB .dwg)
• 7-023 Locking Manhole Frame (221KB .dwg)
• 7-024 Rock-Lined Shoulder Ditches - Curbed Shoulders (233KB .dwg)
• 7-025 Restrictor Detail (386KB .dwg)
• 7-026 Tee Section Shear Gate Detail (238KB .dwg)
• 7-027 Flow Restrictor Control Device, Baffle Type (225KB .dwg)
• 7-028 Debris Cage (220KB .dwg)
• 7-029 Extended Debris Cage (283KB .dwg)

Also see: King County 1993 Road Standards

Updated: July 12, 2007