Metro B Line (Minnesota)

The Metro B Line is a bus rapid transit route in the Minneapolis–Saint Paul region of Minnesota, operated by Metro Transit as part of the Metro network. The route began operation in June 2025, connecting Saint Paul Union Depot to Bde Maka Ska in the Uptown neighborhood of Minneapolis, via Lake Street and Selby Avenue. The B Line succeeds Metro Transit's Route 21, adding transit signal priority, bus lanes, and all-door boarding to provide faster and higher quality service.

Lake Street and Selby Avenue have formed an important east-west travel corridor since the early 20th century. The corridor was served by streetcars until the 1950s, and has been served by buses since. Planning for the B Line began in 2014, and full funding for construction was secured in 2020. Construction began in 2023, and progressed through the 2023 and 2024 construction seasons. The line opened to the public as scheduled on June 14, 2025, although its opening ceremony was cancelled due to security concerns following the shootings of multiple Minnesota legislators earlier that day.