Definition: Defines a hierarchical network used to determine a logical and efficient route for a traveler:
Code | Description |
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1 | Roads that allow for high volume, maximum speed traffic movement between and through major metropolitan areas. Applied to roads with very few, if any, speed changes. Access to the road is usually controlled. |
2 | Roads used to channel traffic to Functional Class = 1 roads for travel between and through cities in the shortest amount of time. Applied to roads with very few, if any speed changes that allow for high volume, high speed traffic movement. |
3 | Roads that interconnect Functional Class = 2 roads and provide a high volume of traffic movement at a lower level of mobility than Functional Class = 2 roads. |
4 | Roads that provide for a high volume of traffic movement at moderate speeds between neighborhoods. These roads connect with higher functional class roads to collect and distribute traffic between neighborhoods. |
5 | Roads that have volume and traffic movement below the level of any functional class. In addition, walkways, truck only roads, bus only roads, and emergency vehicle only roads receive Functional Class = 5. Also includes roads in marginal and illegal settlements in developing countries. |