< South Dakota

South Dakota/Highway Classification

With the permission of user elijahmathews, I (SD Mapman) have heavily based this page off of the ND highway classification page.

General Guidelines

These are based off of what the current state of classification is in South Dakota plus the new trunk road guidance. If the following sentence appears, these are not set in stone and should not be used until this sentence is gone.

  • highway=motorway - This should only apply to I-90, I-29, I-229, and I-190. South Dakota has no non-interstate freeways, with only 6 "motorway islands" throughout the state (US 16/16A, Cambell St/Elk Vale Rd (Rapid City), Elk Vale Rd/SD 44, SD 50 Vermillion West, SD 50 Vermillion East, and US 14 Brookings West).
  • highway=trunk - This should apply to high-speed divided highways in addition to a set of long-haul two-lane highways connecting major cities (list and discussion below).
    • expressway=yes - Rurally, this should apply to the Heartland Expressway (SD 79 from Nebraska to Rapid City), the Eastern Dakota & Pierre expressway system (US 83 from I-90 to Pierre, SD 37 from I-90 Exit 330 to Huron, US 12 from Aberdeen to I-29, US 281 from SD 20 to Aberdeen, and SD 50 from Yankton to I-29), US 85 between Spearfish and Belle Fourche, and US 16 between Keystone and Rapid City. In Sioux Falls, this should apply to Russell St between I-29 and Minnesota Ave and the future SD 100/Veterans Parkway. In Rapid City, this should apply to W Chicago St (SD 231) between Deadwood Ave and Sturgis Rd and the Catron Blvd/Elk Vale Rd beltway along the east side of town.
  • highway=primary - This should be used for any remaining US highways and signed Interstate Business routes along with the most important state highways.
  • highway=secondary - This should be used for the remaining state highways along with unusually important county roads.
    • If a county road and state highway are marked as secondary in the same geographic area, check to see if they are in fact of similar classification level and if not, mark the state highway as higher than the county road.
  • highway=tertiary - This should be used for most county roads.
  • highway=unclassified - This should be used for the remaining unpaved gravel roads.

Population Centers

The following is a list of the twenty largest cities in South Dakota, along with their populations as of the 2020 United States census and the major highways that serve them.

City Population Highways
Sioux Falls192,517
Rapid City74,703
Aberdeen28,495
Brookings23,377
Watertown22,655
Mitchell15,660
Yankton15,411
Huron14,263
Pierre14,091
Spearfish12,193
Box Elder11,746
Vermillion11,695
Brandon11,048
Sturgis7,020
Harrisburg6,732
Madison6,191
Belle Fourche5,617
Tea5,598
Dell Rapids3,996
Milbank3,554

Note: Dell Rapids and Milbank can probably be removed from consideration, but I included them to fill out an even table.

Additionally, since the population of South Dakota is heavily weighted toward East River, the 10 largest cities in West River are presented below.

City Population Highways
Rapid City74,703
Spearfish12,193
Box Elder11,746
Sturgis7,020
Belle Fourche5,617
Hot Springs3,395
Lead2,982
Summerset2,972
Fort Pierre2,115
Custer1,919

WORK IN PROGRESS

This article is issued from Openstreetmap. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.