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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 0-24 PCI 25 to 49 PCI 50-69 PCI 70-89 PCI 90-100
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

Current PCI by Functional Class

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.