The H Line is a RapidRide bus route in Seattle, Washington, United States. It is operated by King County Metro and uses bus rapid transit features, including transit signal priority, exclusive lanes, and off-board fare payment at some stations. The 13-mile (21 km) route begins in Downtown Seattle and travels south on Delridge Way and Ambaum Boulevard through West Seattle and White Center before terminating in Burien.^[1] The H Line began service on March 18, 2023, replacing route 120 after the construction of new stations and bus lanes at a cost of $154 million.^[2]

H Line
A southbound H Line bus at South Jackson Street
Overview
System	RapidRide
Operator	King County Metro
Began service	March 18, 2023 (2023-03-18)
Predecessors	Route 120
Route
Locale	King County
Communities served	Seattle, White Center, Burien
Start	Downtown Seattle
Via	Delridge Way SW Westwood Village 15th Avenue SW Ambaum Boulevard SW
End	Burien Transit Center
Length	13 miles (21 km)
Service
Frequency	Peak: 7 minutes Off-peak: 15 minutes
Weekend frequency	15 minutes (most times)
Journey time	49 minutes
Operates	Weekdays: 4:00 am–2:00 am Weekends: 6:00 am–11:00 pm
Timetable	kingcounty.gov
Route diagram Virginia St 1 Line to Northgate Pike St (Westlake station) Seneca St (University Street station) 1 Line to Angle Lake via Airport Columbia St & to Pioneer Square Seattle Ferry Terminal S Jackson St West Seattle Bridge over Duwamish Waterway to West Seattle SW Andover St SW Genesee St SW Hudson St SW Findlay St SW Graham St SW Holly St SW Myrtle St SW Holden St SW Thistle St SW Henderson St to Downtown Seattle Westwood Village 26th Ave SW 20th Ave SW SW Roxbury St SW 102nd St SW 107th St SW 112th St SW 116th St SW 122nd St SW 128th St SW 136th St SW 142nd St SW 148th St 6th Ave SW Burien Transit Center to Renton This diagram: view talk edit ← G Line  {{{system_nav}}}  I Line →

The line runs every 7 minutes during peak hours and 15 minutes off-peak, with service until midnight on weekdays and 11 p.m. on weekends.^[3][4] The H Line is the seventh RapidRide line to open and features stations with digital e-ink screens for real-time arrivals information, ORCA card readers, and larger shelters. It is the first RapidRide line to open under the Move Seattle program, which was funded by a levy approved in 2015.^[2]