Mile Totals
Sonoma Public Infrastructure's offices are now located at 400 Aviation Blvd, Suite 100, Santa Rosa, CA 95403.
Centerline Miles
Total Centerline Miles: 1,369.38
Centerline mile totals account for the total road length, not accounting for roadway width or number of lanes.
By Supervisorial District:
- District 1:251.71
- District 2:215.06
- District 3:26.05
- District 4:305.48
- District 5:563.07
By Functional Class:
- Other Principal Arterial:1.30
- Minor Arterial:34.62
- Major Collector:316.18
- Minor Collector:114.78
- Local:902.56
(Last Updated: 2025)
Lane Miles
Total Lane Miles: 2,748.42
- Lane miles indicate the total length of roadway taking number of lanes into account. For example, a 1-mile road with 2 lanes (one for each travel direction) is considered 2 lane miles.
- Note that any section of road allowing travel in both directions is considered two (2) lanes, regardless of its width. A road section with two (2) lanes of travel in each direction is considered four (4) lanes.
(Last Updated: 2025)