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Roadway Standards
The Clackamas County Roadway Standards provides a “handbook” for both roadway design and construction of public and private roadway improvements in Clackamas County.
Clackamas County is interested in hearing your comments and suggestions for improvements to the Roadway Standards.
Please email us at richardnys@co.clackamas.or.us. We will review all comments and update the Standards on a regular basis.
Roadway Standards County Responses to Public Comment
Roadway Standards
Roadway Standard Drawings
- C100 Street Structural Section
- C110 Local Roadway Section
- C120 Connector Roadway Section
- C130 Collector Roadway Section
- C140 Arterial Roadway Section
- C200 Temporary Turnaround
- C220 Passenger Vehicle Turnaround
- C300 Standard Cul-de-sac Local Road
- C350 Truck Turnarounds & Turnouts for Public/Private Road & Driveways
- C400 Alternative Horizontal Curves for Low Volume Roads (<400 ADT)
- C450 Notes for Alternative Horizontal Curves for Low Volume Roads
- D250 Typical Plan for Driveway Culvert Installation
- D400 Standard Driveway Entry onto Unpaved County Roads
- D500 Standard Driveways Entry onto Paved County Roads with no Curbs
- D600 Standard Driveway to Curbed County Roads with no Landscape Strip
- D650 Standard Driveway to Curbed County Roads with Landscape Strip
- D675 Alternative High Volume Driveway with Curbs
- D700 Driveway Water Bar (Berm) Construction
- L100 Tree Planting Details
- L200 Street Tree Location
- N100 Standard Notes - General
- N200 Standard Notes - General (Cont) & Grading
- N300 Standard Notes - Street, Storm & Utility
- P100 Parking and Aisle Layout Details
- R100 Private Roads Minimum Standards
- S100 Standard "Type C" Vertical Curb & Curb Details
- S150 Standard Curb and Gutter
- S180 Mountable Curb
- S200 Standard Catch Basin
- S300 Standard Ditch Inlet
- S350 Curb Inlet Catch Basin with Grated Inlet
- S400 Standard Catch Basin Frame and Grate Details
- S450 Catch Basin Curb and Gutter Transition Details
- S900 Single Perpendicular Curb Ramp on Standard Sidewalk with Planter Strip
- S910 Double Perpendicular Curb Ramp on Standard Sidewalk with Planter Strip
- S920 Single Parallel Curb Ramp on Standard Sidewalk Without Planter Strip
- S930 Double Parallel Ramp on Standard Sidewalk Without Planter Strip
- S940 Single Perpendicular Curb Ramp on Standard Sidewalk - Alternate Design
- S960 Standard Sidewalk & Curbed Ramp Notes & Details
- T100 Street Name Signs & Details
- T130 Street Name Signs and Details
- T150 Street Mounting and Attachments
- T250 Sign Installations
- T300 Horizontal Sight Distance Along County Roadways
- U200 Standard Trench and Backfill
- U250 Standard Trench with Controlled Density Backfill (CDF)
- U260 Notes for Controlled Density Backfill
- U270 Alternative Trench with Controlled Density Backfill
- U300 Standard Manhole
- U400 Standard Manhole Details
- U450 Storm Collection System
- U500 Precast Manhole Bases
- U600 Standard Manhole Frame Cover & Watertight Cover
- U700 Suburban Manhole Frame and Cover
- U800 Rip Rap Energy Dissipator
- W100 Exceptions for W.E.S. Details



