Translate
Roads and bridges
Popular pages
Bridges
King County's Department of Local Services, Road Services Division owns and maintains 201 bridges in the unincorporated area of King County. These bridges are an integral part of a road system that supports more than one million vehicle trips every day.
Sign up for road alerts
Road Alert is an email and text alert service for travelers on roads in unincorporated King County. Subscribers get emails and text messages about unincorporated King County road construction projects, significant weather-related road closures and natural disasters. You can receive all alerts or just messages for roads in specific zones.
Road closures in unincorporated King County
Learn about road closures and restrictions in unincorporated King County due to road construction projects, significant weather-related events, and natural disasters.
Road Services projects and programs
Road Services' projects and programs in unincorporated King County
Road services list
List of Roads' online services and information for unincorporated King County.
Road helpline
Helpline for road maintenance and traffic safety issues in unincorporated King County, such as downed stop signs, signals that are out, or trees over the roadway. The helpline is open 24 hours a day, every day.
Additional links
141st Avenue SW Culvert Replacement Project
16th Avenue SW: SW 100th Street to SW 107th Street Pedestrian Safety Improvements & Traffic Calming Project
218th Avenue SE Roadway Preservation Project
244th Avenue NE Slide Repair Project
Project completed in summer 2024
284th Avenue SE Culvert Replacement Project
57th Ave S Sidewalk Improvement Project
68th Ave S/S 124th St Safety Improvement Project
ADA Curb Ramps Upgrade Project
Work began in early June 2025
Adopt-A-Road Application Form
Adopt-A-Road in unincorporated King County
Adopt-A-Road Recognition Sign Request Form
Ames Lake Trestle Bridge Replacement Project
Baring Bridge Replacement Project
Boise X Connection Bridge #3055A sq̓ʷəlacucid* Replacement Project
Bridge Guardrail Upgrade Program
This year’s Bridge Guardrail Program is anticipated to begin in late 2026.
Bridge load limits and permits in unincorporated King County
Bridge Washing in Unincorporated King County
Bridges and Roads Task Force
Bridges in unincorporated King County
Clough Creek Bridge #909B Load Upgrade Project
Coal Creek Bridge No. 3035A Replacement Project
Computer Aided Drafting and Design (CADD) standards
Cultural Resources Protection Program
Cunliffe Road SW Slide Repair Project
Major construction completed in winter 2024
Dockton Seawall repairs
Duvall Slough Bridge #1136B (NE Woodinville Duvall Road) Re-Deck Project
Engineering services in unincorporated King County
Fifteen Mile Creek Bridge No. 493C Replacement Project
Fish Hatchery Road Bridge No. 61B Removal
General safety improvements - School Zone Safety Program
Green River Road Hillside Clean-up and Restoration Project
Guardrail Program
High Friction Surface (anti-skid) Treatment
Historic and Scenic Corridors Project
The Historic and Scenic Corridors Project is a grant-funded project that identifies and preserves our county’s rich transportation history. The project documents the story of over 100 years of road building in the area.
Issaquah Hobart Road SE and SE Tiger Mountain Road - King County
Issaquah-Hobart Road SE and SE May Valley Road Intersection Improvement Project
Judd Creek Bridge #3184 Resurfacing Project
King County Traffic Safety Action Plan
LED Stop Sign Upgrade Project
Map and Record Center
Materials Lab services in unincorporated King County
NE 128th Way Culvert (Fish Passage) Replacement Project
NE 165th Street water over the roadway
NE 24th Street Culvert Replacement Project
NE Big Rock Road Overlay Project
NE Lake Joy Road Culvert Replacement Project - King County
NE Old Cascade Highway Roadway and Drainage Improvements
NE Stillwater Hill Road/Kelly Road NE Roadway Preservation Project
NE Tolt Hill Road Slide Repair Project
Project completed in summer 2024
NE Woodinville Duvall Road at NE 172nd Street Culvert Replacement Project
North Fork Bridge Replacement Project
Redmond Ridge Drive NE and NE Alder Crest Drive Roundabout Project
Project completed in summer 2024
Renton Avenue S Pedestrian Safety Improvement Project
Right-of-way use permits
Right-of-way (ROW) use permits authorize the use of the King County right-of-way for a designated purpose.
Road Resurfacing Projects
Road Services' Capital Improvement Program (CIP)
Road Services' Internship Program
Road Services' list of active Capital Projects - 2026
Road Services' projects and programs in unincorporated King County
Road Services' Strategic Business Plan
Road vacation process in unincorporated King County
Roads' ADA Transition Plan and Accessibility Services
Roads' plans and reports for unincorporated King County
S 277th Bridge No. 3126 Replacement Project
S 360th Street at Military Road S Roundabout Project
Safety and resiliency in Skykomish Valley (Old Cascade Highway washout at Miller River Bridge)
Sahalee Way NE Drainage Improvement Project
School Pathways - School Zone Safety Program
School Zone Safety Program in unincorporated King County
SE 384th Street Culvert Replacement Project
Project completed in September 2025
SE 432nd Street Culvert Replacement Project
Construction completed in fall 2024
SE 472nd Street Culvert Replacement Project
Road reopened on September 4, 2025
SE Covington-Sawyer-Road at 164th Place SE Sightline Improvements Project
SE Edgewick Road Slide Repair Project
SE Green Valley Road at 218th Ave SE Roundabout Project
SE Kent-Kangley Intersection Improvement Project
SE May Valley Road truck traffic
Snoqualmie Valley Major Flood Mitigation Study (Cross Valley)
South Park Bridge
Speed Limit Assessment Projects
Strategic Plan for Road Services (SPRS)
Survey monuments in unincorporated King County
SW Cemetery Road Drainage Improvement Project
Work was completed in winter 2024