Road Categories as defined by the CIE

Category of road

Type and density of traffic

Type of road

Examples

Motorized traffic

A

Heavy and high speed motorized traffic

Road with separated carriage-ways, completely free of crossing at grade, complete access control.

Motor ways

Express way

B

Important traffic road for motorized traffic only, possibly separate carriage ways for slow traffic and/or pedestrians. Important, all-purpose, rural or Urban road.

Trunk road

Major road

C

Heavy & moderate speed motorized traffic or Heavy mixed traffic of moderate speed

Ring & Radial road, etc.

Mixed traffic

D

Fairly heavy mixed traffic of which a major part may be slow traffic or pedestrians

Roads in city or shopping centers, approach roads to official buildings and areas, where motorized traffic meets heavy slow traffic or pedestrians

Trunk road

Commercial roads

Shopping streets etc

E

Mixed traffic of limited speed and moderate density

Collector roads between residential areas (residential streets) and A to D-type roads

Collector road

Local street, etc.