South Dakota/Major roads/Main

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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
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.

South Dakota Minimum Locking Rank Standard
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)