User:Vipul/Oakland Wye

The Oakland Wye is an underground junction in downtown Oakland serving the Bay Area Rapid Transit (BART) system, where trains can switch between (a) the northbound Richmond or Pittsburg/Bay Point lines (first station: 12th Street/Oakland City Center, underground), (b) the westbound San Francisco lines (first station: West Oakland, elevated), and (c) the southbound Fremont or Dublin/Pleasanton lines (first station: Lake Merritt, underground). The Oakland Wye has been described as one of the central and most complex part of the BART system, and is a speed bottleneck for the whole system because all BART trains pass through it.