Page 68 - TransportationPlanUsetsGuide

Functional Classification Definitions

Principal Arterials form the backbone of the
road network and are generally labeled free-
ways and highways. These routes connect over
the longest distance (miles) and are spaced
less frequently than other Arterials. These free-
ways and highways generally span several ju-
risdictions and can have statewide importance.
At a minimum, highways that are classified by
ODOT as Interstate or Statewide Highways are
considered Principal Arterials. General charac-
teristics of Principal Arterials can include:
• Freeways have the highest level
of access control, including grade Principal Arterial: OR Highway 26 (Sunset Highway)
separated interchanges. No at-
grade driveways or connections
are allowed.
• Highways generally have limited
at-grade connections.
ADOPTED TEXT connections for the movement
• Freeways and highways provide

of people, services and goods
between the central city, regional
centers and destinations beyond
the region.
• Principal Arterials that are not
freeways are managed to mini-
mize the degradation of capacity
while providing limited access to Principal Arterial: OR Highway 217 (Beaverton Tigard Highway)
abutting properties.

Principal Arterial: Hwy 47 (Nehalem Hwy)

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