User:Compdude/Draft:Washington highways

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This is a draft of content to use on the Washington page as replacement for the minimal road tagging guidance. It is based on discussions on Talk-us: US Trunk road tagging and the OSMUS Slack. Feel free to discuss or help edit this content prior to any inclusion on Washington.

This page describes Washington-specific determinations for implementing US highway classification values.

Important regional centers

The following cities in and around Washington are considered important regional centers:

  • Seattle, WA
  • Tacoma, WA
  • Everett, WA
  • Spokane, WA
  • Olympia, WA
  • Tri-Cities, WA (Pasco, Kennewick, and Richland)
  • Yakima, WA
  • Moses Lake, WA
  • Aberdeen, WA
  • Longview, WA
  • Bremerton, WA
  • Walla Walla, WA
  • Lewiston, ID/Clarkston, WA
  • Centralia/Chehalis, WA
  • Coeur d'Alene, ID
  • Vancouver, BC
  • Kelowna, BC
  • Portland, OR
  • Astoria, OR
  • The Dalles, OR
  • Sandpoint, ID

Trunk roads

The following routings are the principal routes between pairs of important population centers, and not serviced by highway=motorway, and thus should be tagged highway=trunk.

From To Trunk routing
Everett, WA Spokane, WA US 2
Aberdeen, WA Olympia, WA US 12/ WA 8/ US 101
Aberdeen, WA Centralia/Chehalis, WA US 12
Centralia/Chehalis, WA Yakima, WA US 12
Tri-Cities, WA Walla Walla, WA US 12
Walla Walla, WA Clarkston, WA/Lewiston, ID US 12
Tri-Cities, WA Spokane, WA US 395
Clarkston, WA/Lewiston, ID Spokane, WA US 95/ US 195
Astoria, OR Aberdeen, WA US 101/ WA 401/ WA 4/ US 101
Aberdeen, WA Port Angeles, WA US 101
Seattle, WA Port Angeles, WA I-5/ WA 104/ US 101
Port Angeles, WA Olympia, WA US 101
Tacoma, WA Bremerton, WA WA 16/ WA 3
Bremerton, WA Port Angeles, WA WA 3/ WA 104/ US 101
Seattle, WA Wenatchee, WA I-90/ WA 970/ US 97/ US 2
Tacoma, WA Yakima, WA I-5/ WA 18/ I-90/ I-82
The Dalles, OR Yakima, WA I-84/ US 97
Yakima, WA Wenatchee, WA I-82/ I-90/ US 97/ US 2
Wenatchee, WA Kelowna, BC US 2/ US 97/ BC 97
Astoria, OR Longview, WA US 30/ WA 433/ WA 432
Wenatchee, WA Moses Lake, WA WA 28/ WA 281
Spokane, WA Sandpoint, ID US 2

Special cases