4412.B is a model of the G-Train Light Rail Line in Seattle, Washington. It is a model of how light rail lines are designed, constructed, maintained and operated in the Seattle area. The line was constructed by Sound Transit in 2010 and began full operation in 2016. It serves the Ballard, Queen Anne, and Magnolia neighborhoods in Seattle, along with the University of Washington in Seattle's University District. The route is 7.1 miles (11.4 km) long, with 11 stations and two branches. The line connects Ballard to the downtown core, and ultimately to Sea-Tac Airport.