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Roads Division
Construction Standards
Sonoma Public Infrastructure's offices are now located at 400 Aviation Blvd, Suite 100, Santa Rosa, CA 95403.
The construction standards and notes listed below were approved by the director of Transportation & Public Works and adopted on July 9th 2020 by the County of Sonoma Board of Supervisors per County Ordinance 38-2020-0446 ‘Adoption of an Ordinance to Amend References to Applicable Design and Construction Standards’.
Roadway
- 100 - Recommended Abbreviations, Lines, Symbols
- 214 - Edge Grind Detail Transverse Conform Typical Section
- 216 - Bus Stop Turnout Typical Section (Urban)
- 218 - Survey Monument
- 218A - Survey Monument Cover Replacement
- 219A - Pavement Cut Policy
- 219B - Trench Backfill and Paving Details
- 219C - Pavement Cut Policy Intersections
- 219D - Bell Hole Policy
- 219E - Exception to Standard Details
- Standard Improvement Plan Construction Notes
Utility Companies: See Guidelines for Utility Cuts on County Roads
Sidewalk
- 220 - Curb, Gutter and Sidewalk
- 222 - Weakened Planes, Score Marks and Expansion Joints
- 223 - Curb, Gutter and Sidewalk Expansion Joint, New to Exist
- 224 - Pedestrian Ramps, Location Overview
- 224A - Curb Ramp Exceptions and Supplemental Requirements to State Standard Plans A88A and A88B
- 224B - Curb Ramp, General Notes
- 226 - Typical Sidewalk Obstruction Transition
- 228 - Asphalt Concrete Walkway
- 229 - Sidewalk Barricade
Fencing
Mail & Newspaper Boxes
- 302 - Mailbox Assembly (Single)
- 303 - Mailbox Assembly (Double)
- 304 - Mailbox Support Hardware, Series A
- 305 - VLOC Single and Multiple Mailbox Assemblies
- 306 - Mailbox Installation with Wooden Post
Drainage
- 400 - Temporary Field Drain
- 402 - Storm Drain Outlet Rock Slope Protection
- 404 - Sidewalk Drain Detail
- 406 - Valley Gutter Type Cross Gutter
- 409 - Concrete Cap (Driveway Culvert)
- 410 - Concrete Collar, Storm Drain
Street Lights
- 600 - Pull Box Installation, No. 5 Pull Box
- 602 - Pull Box Installation, No 5 (T) Pull Box
- 605 - Led Street Light Schematic Wiring Diagram
- 606 - Electric Service Detail, Underground Service
- 608 - Electric Service Detail, Overhead Service
- 610 - Street Lights, Arterial Streets
- 612 - Street Lights, Collector Streets
- 614 - Street Lights, Local Streets
- 616 - Concrete Footing Detail, Standard Street Light Pole
- 618 - Base Detail, Standard Street Light Pole
- 620 - Street Light Base Leveling Detail
- 622 - Street Lights, Lateral Light Distribution
- 630 - Traffic Signal Loop Detector Replacement
- Street Lighting Requirements Notes and Legend
Traffic Signing
- 700 - Street Name Sign, Metal Pole Mounting
- 702 - Street Name Sign, Wood Post Mounting
- 704 - Advance Street Name Sign
- 706 - Street Name Signs, Mast Arm Mounted Brace Detail
- 708 - Barricade Placement for R1 Sign Installation in Painted Island
- 710 - Special Event Signing
- 712 - Sign Location and Installation Details
- 712A - Sign Foundations Details
- 714A - Temporary Wooden Barricade
- 714B - Pavement Transition Barricade
- 714C - Pavement Transition Barricade Details
- 714D - Barricades, General Notes
- Specifications about Signing, Striping and Marking
Driveways
- 804 - Driveway Details for Utility Trenching
- 806 - Urban Driveway, Heavy Use, Commercial
- 808 - Urban Driveway, Light Use, Commercial and Residential
- 812 - Rural County Road, Driveway and Private Road Intersections
- 815 - Rural Driveway / Roadway
- 816 - Rural Driveway Drainage, Ditches
- 818 - Rural Driveway Drainage, Valley Gutters
- 820 - Rural Driveway Drainage, Culverts