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Sonoma Public Infrastructure (formerly TPW)
Roads Division
Pavement Condition
Transportation and Public Works is now Sonoma Public Infrastructure - Website updates coming soon!
Pavement Condition Index (PCI)
What is PCI?
Pavement Condition Index, or PCI, is a numerical index between 0 and 100, which is used to indicate the condition of a specific section of road pavement. Note that PCI does not apply to dirt and gravel roads.
Pavement Inspections
PCI is determined by a manual inspection process, done on site by professional pavement inspectors. Inspectors score a section of roadway by conducting a detailed examination of pavement features such as cracking and potholes.
Map of Current PCI
Legend
| Symbol |  |
 |
 |
 |
 |
| PCI | 0 to 24 | 25 to 49 | 50 to 69 | 70 to 89 | 90 to 100 |
| Meaning | Very Poor | Poor | Good | Very Good | Excellent |
Historical Pavement Condition Trends
| Year | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 |
|---|---|---|---|---|---|---|---|---|---|---|
| PCI: | 44 | 48 | 48 | 51 | 51 | 48 | 50 | 50 | 50 | 49 |
- Last updated: March 2020
- Results are generated using the Metropolitan Transportation Commission's pavement management software system, StreetSaver.
Current PCI by Functional Class
| Number of Miles | % of Total Road Miles | Average PCI | |
|---|---|---|---|
| Minor Arterial | 77.3 | 5.4 | 80 |
| Principal Arterial | 1.3 | 0.1 | 78 |
| Major Collector | 316.2 | 22.4 | 70 |
| Minor Collector | 114.8 | 8.1 | 50 |
| Local Roads | 901.9 | 64.0 | 37 |
- Last updated: March, 2020
Conclusions:
- Local roads make up the majority of the County's road system. These are in poor condition, and bring down the system-wide average PCI.
- Major Collector and Arterial roads have been kept in better condition. These see higher usage, and therefore receive more funding for pavement maintenance.