Functional Classification
According to the South Dakota Department of Transportation, Functional Classification is described as the following.
Functional classification refers to the type of service each particular road provides the traveling public.
The easiest resource to use for Functional Classification data in South Dakota is the South Dakota DOT Map Viewer and Data Download site.
The chart below is available to relate South Dakota Functional Classification to Waze Road Types.
State Road Reference Chart
| SD FC Value | FC | Qualifier | Corresponding Waze Road Type | Example |
|---|---|---|---|---|
| Interstate | None | Freeway | I-90/I-29 | |
| Principal Arterial - Other Freeways and Expressways | Controlled-access highway | Freeway | [None] | |
| Principal Arterial - Other | Non-controlled-access highway | Major Highway | US-81 | |
| Minor Arterial | None | Minor Highway | SD-38 | |
| Major or Urban Collector | None | Primary Street | W 18th St | |
| Paved Urban Minor Collector | None | Primary Street | CR-102 | |
| Unpaved Urban Minor Collector and Street | None | Street |
Lock Levels
In South Dakota we have a set minimum standard for locking roads based on segment type. Any road of a certain segment type must be locked at least to the rank (level) in the chart below. Roads may be locked higher for protection and special situations (areas with construction, tricky design, frequent mistakes, imaging inaccuracies, and the like), but should not be locked lower.
A great time to implement these locks is while bringing the road types of an area into compliance with the current US road type standards (FC and highway systems). Lock the roads based on type after they've been set to current US road type standards.
| Segment Type | Statewide |
|---|---|
| Freeway | 4 |
| Ramp | Highest rank of connected segments |
| Major Highway | 3 |
| Minor Highway | 3 |
| Primary Street | 2 |
| Street | 1 |
| • • • • Ferry • • • • | 5 |
| |-|-|-|-|-|-|-|-|-| Railroad |-|-|-|-|-|-|-|-|-| | 2 |
Name Normalization
South Dakota will use the following standards for naming:
Interstates - I-xx
US Highways - US-xx
State Highways - SD-xxx
County Highways - CR-xxx (Only if they have no other name)