On weekends, buses arrive every 20 minutes most of the day, with longer headways of 40 minutes during nights and every hour overnight. On weekdays, buses operate every four to ten minutes during peak hours, with longer headways of 15 minutes during the daytime, 20 minutes during evenings, 40 minutes during nights and every hour overnight. J Line buses run 24 hours a day between El Monte Station, Downtown Los Angeles, and the Harbor Gateway Transit Center as route 910, with some trips continuing on to San Pedro between 6 a.m. The J Line is part of the Metro Busway system. Rosecrans station is used by the Metro J Line bus rapid transit route which runs between the El Monte Station in El Monte, Downtown Los Angeles and the Harbor Gateway Transit Center in Gardena, California, with select trips continuing onto San Pedro. Metro J Line bus departing Rosecrans to Downtown LA & El Monte in the afternoon → J Line toward Harbor Gateway or San Pedro ( Harbor Gateway) → ← J Line toward El Monte ( Harbor Freeway) Side platform, doors will open on the right GĮntrance/Exit, ticket vending machine, park and ride lot The station has 202 park and ride spaces in a parking lot built into one of the 'leaves' of the partial cloverleaf interchange between Rosecrans Avenue and Interstate 110. The ground-level plazas each have a TAP card ticket vending machine that was added in early 2017 to support all-door boarding on the J Line. The below-grade platforms are accessed from two ground-level plazas on the north and south sides of East Rosecrans Avenue between Figueroa Street and Vermont Avenue. Rosecrans station is also served by Metro Express route 550 and Torrance Transit route 4, which only run during weekday peak periods. J Line buses serve the station twenty-four hours a day the headway between buses is about four minutes during peak periods, with less frequent service at other times.

Rosecrans station was built between 19 as part of the Harbor Transitway project and opened to passengers on August 1, 1996.

The station serves the Harbor Gateway neighborhoods of Los Angeles. The station consists of two side platforms in the center of Interstate 110 under Rosecrans Avenue. It is situated between the Harbor Freeway station and the Harbor Gateway Transit Center on the J Line, a bus rapid transit route which runs between El Monte, Downtown Los Angeles and San Pedro as part of the Metro Busway system. Rosecrans station is a busway station located in Los Angeles, California.

Harbor gateway transit center