The NAASRA Road Classification System is a road hierarchy consisting of nine classes of roads, namely:
Class 1 - Those roads which form the principal avenue for communication between major regions of the Commonwealth, including direct connections between capital cities.
Class 2 - Those roads, not being Class 1, whose main function is to form the principal avenue of communication for movements:
- Between a capital city and adjoining States and their capital cities;
- Between a capital city and Key Towns, and
- Between Key Towns.
Class 3 - Those roads, not being Class 1 or 2, whose main function is to form an avenue of communication for movements:
- Between Important Centres and the Class 1 and Class 2 roads and/or Key Towns;
- Between Important Centres, and
- Of an arterial nature within a town in a rural area.
Class 4 - Those roads, not being Class 1, 2 or 3, whose main function is to provide access to abutting property (including property within a town in a rural area).
Class 5 - Those roads which provide almost exclusively for one activity or function and which cannot be assigned to Classes 1, 2, 3 or 4.
Class 6 - Those roads whose main function is to form the principal avenue of communication for massive traffic movements.
Class 7 - Those roads, not being Class 6, whose main function is to supplement the Class 6 roads in providing for traffic movements or
which distribute traffic to local street systems.
Class 8 - Those roads, not being Class 6 or 7, whose main function is to provide access to abutting property.
Class 9 - Those roads which provide almost exclusively for one activity or function and which cannot be assigned to Classes 6, 7 and 8.
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