2022-09-01
This document describes the central Puget Sound region's Metropolitan Transportation System (MTS), a multi-modal network of roads, ferries, transit, rail, and aviation facilities serving King, Kitsap, Pierce, and Snohomish counties. It outlines how regionally significant transportation facilities and services are identified and planned in accordance with federal and state requirements, including nine categories of statewide transportation significance. The document also provides a detailed breakdown of the region's approximately 16,790 miles of roadways by county, ownership, and functional classification as of 1999.