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Cornell Road in Hillsboro
Functional Classification Summary
As of 2011, Washington County had jurisdiction more than 1,300 centerline miles of roadway, about evenly divided
between urban and rural areas. The Local Street classification accounted for nearly 60 percent of the total road mileage
in the county in 2011. These mileage figures include roads located entirely within the unincorporated area of Washing-
ton County as well as roads under County jurisdiction located within the cities of Washington County. Most of the latter
category consists of Arterials such as Tualatin-Sherwood Road in Tualatin and Sherwood, Cornell Road in Hillsboro, and
Walker Road in Beaverton.

Table 3.8 summarizes the mileage of different classifications of roads within Washington County. The Functional Clas-
sification map included as Figures 3-8 and 3-9 identifies the functional classification for all County roadways. Design
parameters for the different functional classifications are included in Table 3.9.

Table 3.8: Washington County Road Mileage by Functional Classification
Classification Mileage Percent of Total Miles
Urban Area
Arterial 125 9.7
Collector 74 5.8
Neighborhood Route 83 6.5
Local 362 28.2
Urban Total 644 50.2

Rural Area
Arterial 74 5.8
Collector 191 14.9
Local 374 29.2
Rural Total 639 49.8
County Total 1,283 100
Source: Washington County
The above designations are underlying functional classification designations. Collector, Neighborhood Route and Local streets may also have Special
Area designations, particularly in areas where transit oriented development is planned.

62 PART 3: TRANSPORTATION MODAL ELEMENTS
Effective November 27, 2015 • Updated December, 15 2016