37°48′03″N 122°16′22″W / 37.8008°N 122.2729°W / 37.8008; -122.2729
21-563: The Oakland Wye is an underground flying wye junction in downtown Oakland, California which serves the Bay Area Rapid Transit (BART) system. Trains can switch between (a) the northbound Richmond or Antioch lines (first station: 12th Street Oakland City Center , underground), (b) the westbound San Francisco lines (first station: West Oakland , elevated), and (c) the southbound Berryessa or Dublin/Pleasanton lines (first station: Lake Merritt , underground). The Oakland Wye
42-689: A movie theater. The former presidential yacht USS Potomac is moored at an adjacent slip. The area developed as a warehouse and industrial district due to its proximity to major transportation, including the Southern Pacific Railroad (now Niles Subdivision ) on Embarcadero West and the Western Pacific Railroad (now Oakland Subdivision ) on Third Street, as well as the Oakland Estuary . The area between Broadway, Webster, First Street (Embarcadero) and
63-476: A switch at the north end of the wye, injuring 14 passengers. In February 2000, automatic train controls failed due to a loose cable and trains through the Oakland Wye were forced to operate in manual and slow to 5–10 mph (8.0–16.1 km/h) when switching tracks. In February 2009, two northbound trains from West Oakland and Lake Merritt (one operating in manual mode) collided and partially derailed in
84-513: A tighter turn between Lake Merritt station and 12th Street/Oakland City Center and, consequently, lower speeds through the Wye. There is some evidence that then-Oakland mayor John C. Houlihan objected to the original 8th Street location because it threatened a store owned by a friend of his. A third track (labeled MX/CX in the above schematic diagram) connecting West Oakland, 12th Street Oakland City Center, 19th Street Oakland , and MacArthur stations
105-468: A turnback is built in the Oakland Wye. [REDACTED] Media related to Oakland Wye at Wikimedia Commons Flying junction A flying junction or flyover is a railway junction at which one or more diverging or converging tracks in a multiple-track route cross other tracks on the route by bridge to avoid conflict with other train movements. A more technical term is " grade-separated junction ". A burrowing junction or dive-under occurs where
126-511: Is a neighborhood on the waterfront of Oakland , California , United States. Named after the author Jack London and owned by the Port of Oakland , it is the home of stores, restaurants, hotels, Amtrak 's Jack London Square station , a San Francisco Bay Ferry ferry dock , the historic Heinold's First and Last Chance Saloon , the (re-located) cabin where Jack London lived in the Klondike , and
147-459: Is grade-separated except for a single-track link on the least-used side, linking Paris Gare du Nord and Paris CDG airport. Finland There are between 25 and about 40 flying junctions on Dutch railways, depending on how more complex examples are counted. Flying junctions where the merged lines become a four track railway: More complex flying junctions, with tracks from four directions joining: Jack London Square Jack London Square
168-464: Is normally used by Antioch -bound trains. Emergency exit/access points are located in a small building at 7th & Broadway with access to the A and M lines and a sidewalk hatch at 9th & Harrison with access to the A and C lines. The original operating speed through most of the Oakland Wye was intended to be 27 mph (43 km/h). Design problems led BART operations to impose a lower 18 mph (29 km/h) speed limit on most tracks. Although
189-590: Is the center of the BART system (all mileposts measure distance from the wye), and is a bottleneck for the whole system because every regularly scheduled BART train (except for the Oakland Airport Connector and eBART ) passes through it. The wye is a flying junction that is approximately centered underneath Broadway and 9th Streets. Trains coming from the underground 12th Street Oakland City Center station (with platforms on two levels) approach
210-755: The LGV Sud-Est , at Pasilly where the line to Dijon diverges, and on the LGV Atlantique at Courtalain where the line to Le Mans diverges, are fully grade-separated with special high-speed switches ( points in British terminology) that permit the normal line speed of 300 km/h (186 mph) on the main line, and a diverging speed of 220 km/h (137 mph). The LGV network has four grade-separated high-speed triangles: Fretin (near Lille), Coubert (southeast Paris), Claye-Souilly (northeast Paris) and Angles (Avignon). A fifth, Vémars (northeast Paris),
231-479: The Wye while merging to approach 12th Street/Oakland City Center. Bypasses that would connect MacArthur and Oakland Coliseum with the Transbay Tube directly have been proposed to create express service, reduce the systemwide effects of delays in the Wye, and potentially provide an infill station at Jack London Square . Other infill stations or more frequent service may be provided in urban core areas if
SECTION 10
#1732780854996252-401: The design has since been corrected, the speed restrictions remain as a cautionary measure. The center "CX" track connecting West Oakland station to 12th Street is the only track with a higher operating speed of 36 mph (58 km/h) through the Wye. Early plans called for the Wye to be centered underneath Broadway and 8th Street, but this was later changed to Broadway and 9th. This required
273-451: The diverging line passes below the main line. The alternative to grade separation is a level junction or flat junction, where tracks cross at grade , and conflicting routes must be protected by interlocked signals . Simple flying junctions may have a single track pass over or under other tracks to avoid conflict; complex flying junctions may have elaborate infrastructure to allow multiple routings without trains coming into conflict, in
294-518: The estuary was named Jack London Square in 1951. On May 1, 1951, the area was formally dedicated and a plaque placed at the foot of Broadway. Jack London Square is located at the south end of Broadway, across the Oakland Estuary from Alameda . The name has also come to refer to the formerly industrial neighborhood surrounding Jack London Square now known as the Jack London District , which has undergone significant rehabilitation in
315-573: The last decade, including loft conversions and new construction. Former California Governor (and former Oakland mayor) Jerry Brown made his home here before moving north to the Uptown neighborhood. KTVU (Channel 2), the Bay Area's Fox affiliate, has had studios at the Square since it began broadcasting on March 3, 1958, and the offices of the Port of Oakland are located there as well. The Square
336-546: The manner of a highway stack interchange . Where two lines each of two tracks merge with a flying junction, they can become a four-track railway together, the tracks paired by direction. This happens regularly in the Netherlands (see Examples below). Nearly all junctions with high-speed railways are grade-separated. On the French Lignes à Grande Vitesse ( TGV ) high-speed network, the principal junction on
357-443: The middle of Embarcadero West , with the train speed limit set at 15 mph (25 km/h). Trains served 16th Street station until earthquake damage in 1989; afterwards, that station was replaced in 1994 by the present-day Jack London Square station. The tracks running through Jack London Square are used by BNSF and Union Pacific and Amtrak 's Capitol Corridor , Coast Starlight and San Joaquin services. The trains share
378-427: The road with automobiles, AC Transit buses, and pedestrians. A second Transbay Tube may include a BART station at the square. Another possibility is an aerial tramway to BART stations in downtown Oakland . Jack London Square's most recent changes are adding more businesses, restaurants, and entertainment. Under lead developer Ellis Partners, Jack London Square's new architecture and public spaces are adding to
399-422: The wye from underneath Broadway and those from the underground Lake Merritt station approach from approximately underneath 9th Street. Those trains coming from the elevated West Oakland station enter tunnel portals near Washington and 5th Streets before turning towards Broadway. An additional third track (labeled MX/CX in the schematic diagram) provides additional capacity between West Oakland and 12th Street, and
420-789: Was also the temporary home of the Oakland Tribune from 1989 to 1996 after the newspaper was forced to abandon the landmark downtown Tribune Tower due to damage it sustained in the 1989 Loma Prieta earthquake . Other businesses at Jack London Square range from the Oakland Athletics team headquarters and software firm Navis LLC, to restaurants such as Farmhouse, Noka Ramen, Scott's Seafood and Yoshi's restaurant and jazz club. California Canoe & Kayak retail and kayak rental shop has been located in Jack London Square since 1993. A mainline railroad runs through
441-460: Was completed in 1986. Originally the MX/CX was used for peak hour service (westbound towards San Francisco in the morning, and eastbound in the evening). Since 1992, it has been used almost entirely for eastbound Yellow Line trains, allowing for cross-platform transfers with Orange Line trains. On December 17, 1992, a southbound train (operating on northbound track C1 due to maintenance ) split
SECTION 20
#1732780854996#995004