HIGHWAY FUNCTIONAL

CLASSIFICATIONPrepared by

Wrya Hade Nadir

FUNCTIONAL CLASSIFICATION-is the process by which streets and highways

are grouped into classes, or systems, according to the character of traffic service that they are intended to provide. There are three highway functional classifications: arterial, collector, and local roads

HIGHWAY CHARACTERISTICS

MOBILITY AND ACCESS

-Roads have two basic functions:1-providing mobility: we mean

moving traffic2- providing access: we mean

providing access to the homes and businesses that the road serves

MOBILITY

ACCESS

RELATIONSHIP TO SERVICE

HIGHWAY FUNCTIONAL CLASSES

(1-RURAL STREET SYSTEM)1-interstate road system:

2-primary road system: highway international importance. the main highway connecting main cities design on highest standared.

3-secondary road system: highway connecting

major cities of economical or other important.commertial,tourist or recreational

4-tertiary road system: highway district and local importance

HIGHWAY FUNCTIONAL CLASSES (1-URBAN STREET SYSTEM)

1-Free way system: 120m in Erbil

2- Arterial road system: 40m,60m in Erbil

3-Collector road system: used as a connection between local roads and arterial roads

4- Local road system: They are designed specifically to have high accessibility and to connect to collector and arterial roads, and are typically not used for through traffic.

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