Road Classifications.docx

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Road Classifications

• Functional Classification

Categorizing roads based on the type of service provided: freeway/expressway,major arterial, minor arterial, collector, connector or local road.

• Freeway/Expressway

A highway that serves inter-regional and intra-regional trips, and carries heavy

volmes of traffic at high speeds. !xamples: "-#$%& the 'ilwa(ie !xpressway

)*regon +ighway ##

• Major Arterial

A road that primarily carries local and throgh traffic to and from destinations

otside local commnities& connects cities and rral centers, and carries

moderate-to-heavy volmes of traffic at moderate-to-high speeds. !xamples:

nnyside oad& 0oones 1erry oad

• Minor Arterial

A road that primarily connects collectors to higher order roadways, and carries

moderate volmes of traffic at moderate speeds. !xamples: *atfield oad&

0eavercree( oad& 0orland oad

• Collector

A road that is a principal carrier within neighborhoods or single land se areas.

Collectors lin( neighborhoods with major activity centers, other neighborhoodsand arterials and are generally not for throgh traffic. 2hey carry low-to-moderate

volmes of traffic at low-to-moderate speeds. 3ew collectors shold intersect

minor arterials rather than major arterials. !xamples:

+ill oad& Aldercrest oad& +oward4s 'ill oad

• Connector

A road that collects traffic from and distribtes traffic to local streets within

neighborhoods or indstrial districts. Connectors are sally longer than local

streets and carry low volmes of traffic at low speeds. Connectors primarily serve

access and local circlation fnctions, and are not for throgh traffic. 2raffic

calming measres may be appropriate. A connector shold connect to a collector

or minor arterial. !xamples: *regon 2rail 5rive& ieben Cree( 5rive

• Local

A road designed to provide access to abtting property and to connect to higher

order roads. 3ew local roads shold intersect connectors, collectors or, if



necessary, minor arterials. 2raffic calming measres may be appropriate. 6ocal

roads are inappropriate for throgh traffic.

• Alley

An alley provides access to the rear of properties and may be pblic or private.

Alleys shold intersect local roads or connectors. Alleys are not for throgh

traffic.

• Jurisdictional Classifications

A classification of roads based on ownership of the road.

• Interstate Higways

'lti-lane federal highway that provides connections to major cities, regions of

the state and other states. "nterstate highways are major freight rotes.

'aintenance responsibilities belong to the *regon 5epartment of 2ransportation.

2here are two interstate highways in Clac(amas Conty: "-% and "-#$%.• !tate Higways

tate-owned roads that provide the primary connections to larger rban areas,

ports and major recreational areas that are not directly served by interstate

highways. 'aintenance responsibilities belong to the *regon 5epartment of

2ransportation. !xamples in Clac(amas Conty: *regon +ighway #78& *regon

+ighway ##& *regon +ighway 99!

• County Roads

blic roads for which the Clac(amas Conty 0oard of Commissioners has

accepted maintenance responsibility.

• "u#lic Roads

oads owned by the Conty or on a Conty easement that are not maintained by

the Conty& maintenance responsibility lies with abtting property owners.

• "ri$ate Roads

oads owned by a private property owner. blic access and se is by

permission of the property owner.

• City !treets

imilar to Conty roads, except nder the jrisdiction of a city.

%esign/Engineering &er's

• Capacity

2he maximm rate at which persons or vehicles can be reasonably expected to



• *etland

A lowland area, sch as a marsh or swamp, satrated with moistre. A natral

wildlife habitat.

Maintenance &er's• Cip !eal

A sprayed-on application of an asphaltic emlsion, with a thin layer of aggregate

spread over an existing srface. 2he emlsion improves or restores the

waterproof condition of the old pavement srface and arrests any scffing or

raveling. 2he addition of a cover of aggregate over the sprayed-on emlsion

restores and improves s(id resistance.

• Cold Mix

ee gg 'ix below.

• Contract ($erlays

@or( completed by private contractors when pavement rehabilitation is beyond

rotine maintenance. ehabilitation activities inclde hot and cold recycling,

strctral overlays and reconstrction. ehabilitation is intended to salvage,

strengthen and modernize badly deteriorated pavement. Contract overlays and

rehabilitation shold provide for an additional 7$-#$ years of serviceability at

redced maintenance costs.

• Maintenance ($erlays

A process of applying hot asphaltic concrete to an average depth of 7-7/# inches

to create a new, smoother driving srface.

• "a$e'ent !tructure

2he combination of sbbase, base, base corse and srface corse placed on a

sbgrade to spport the traffic load and distribte it to the road bed.

• "ugg Mix

ometimes called cold mix, emlsified asphalt is mixed with aggregate at a site

near the road to be resrfaced. *pen-graded cold mix cres more slowly than

hot asphaltic concrete and generally re;ires a load limit for a short period. A

chip seal is often placed as a wearing srface. @here there may be trning

movements or other special needs, the softer open-graded cold mix may be

replaced with hot mix in critical sections.



• Reconstruction

Complete road reconstrction )i.e., remove and replace existing pavement on

essentially the present alignment for distance of at least $.8 miles.

• Resurfacing1 including soulder i'pro$e'ents

Adding an overlay in excess of 8/ inch, pls appropriate improvements to

sholders sch as adding material to bring them p to grade, widening or

reconstrcting sholders.

• Routine Maintenance

"ncldes all operating and maintenance activities that are condcted on a

fre;ent and ongoing basis )e.g., cleaning and shaping drainage facilities,

operating and replacing traffic control devices, maintaining roadside facilities,

street sweeping, snow and ice control, grading npaved roads, emergency

pothole patching, and pavement joint sealing and s(in patching.

2ridge "rogra's

• 2ridge I'pro$e'ent

'ajor rehabilitation and strengthening and/or replacement of existing strctres

nderta(en independently of improvements to the roadway.

• 2ridge Rea#ilitation

"nvolves major strctral modifications to an existing bridge inclding widening,

sbstrctre repair, sperstrctre strengthening, dec( replacement or

rehabilitation, and rail improvement.

Road Classifications.docx

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