RapidRide C Line
bus rapid transit route in Seattle, Washington
The C Line is one of eight RapidRide lines (routes with some bus rapid transit features) operated by King County Metro in King County, Washington. The C Line began service on September 29, 2012, running between downtown Seattle, West Seattle, Fauntleroy and the Westwood Village Shopping Center in the Westwood neighborhood. The line runs mainly via Westlake Avenue, 3rd Avenue, Washington State Route 99, the West Seattle Bridge, California Avenue and Fauntleroy Way.
History
This corridor was previously served by King County Metro routes 54 and 54 Express, which carried a combined average of 4,650 riders on weekdays during the last month in service. Since the implementation of RapidRide on the corridor, ridership has grown 79 percent and the C Line served an average of 8,300 riders on weekdays in spring 2015.
The C Line originally interlined with the D Line, which continued north from downtown to Lower Queen Anne, Interbay, and Ballard. The two routes were uncoupled during a service change on March 26, 2016, and the C Line was moved onto Westlake Avenue to terminate in South Lake Union, sharing several stops with the South Lake Union Streetcar.
The C Line originally accessed downtown via State Route 99 and the Alaskan Way Viaduct, using the Seneca Street and Columbia Street ramps. The viaduct closed on January 11, 2019, and the route was moved to a new alignment in SoDo using the SODO Busway and 4th Avenue. A new C Line stop serving the waterfront, at Alaskan Way and South Jackson Street, opened in February 2022.
The public source identifies “RapidRide C Line” as bus rapid transit route in Seattle, Washington. This brief keeps that definition visible, then builds a research path around RapidRide, Line and rapid.
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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Dec 14, 2025. The linked authority identifier is Q18156865. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2012, 2015, 2016 and 2019.
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This entry incorporates text from “RapidRide C Line” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.