Although vacuum brake boosters are almost ubiquitous, some vehicles use hydraulic brake boosters, which are powered by hydraulic pressure instead of vacuum. This pressure is provided by a drive belt-driven pump and may be tied into a hydraulic power steering system.
Unity Station. The exterior of Unity Station in Los Santos, San Andreas. Unity Station is a railway station in Grand Theft Auto: San Andreas located along the Brown Streak Railroad line in San Andreas.
It stands as the only underground transit station in the entire state of San Andreas, and is one of the two rail stations in Los Santos, the other being Unity Station in El Corona, which is modeled after Union Station in Downtown Los Angeles.