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Functional Classification

Oregon follows the Functional Classification (FC) system for both state and non-state roads. This change from the previous road-typing guidance was changed in September 2014.

To properly type a Freeway, Major Highway, Minor Highway, or Primary Street, refer to the Oregon TransGIS site and cross reference that against the Waze Functional Classification table.

State-wide

Oregon Department of Transporation (ODOT) homepage
ODOT Map-based project tracker
Oregon Route to Highway Cross Reference
ODOT Digital Video Log (DVL)
Oregon highway summary by Route shows you all the Oregon highways which comprise state and US routes.
ODOT TransGIS can be used to view all manner of roadway attributes, including Functional Classification. To view functional classifications, go to Display->Layer Catalog->Highway Classifications. Select both/either State and Non-State.
ODOT Trucking Restrictions Good resource for scheduled freeway & highway closures. Updated daily.
Oregon Zipcode Map from ZipMap.net
State Highways in Oregon on wikipedia
ODOT Updates via email
US and Oregon Routes Descriptions (talks about where routes go, as compared to Oregon highways