According to the California Street and Highways code, most maps, and local signs, I-80 begins at the intersection with U.S. Route 101 in San Francisco. However, federal logs place the western terminus of I-80 at the western approach to the San Francisco–Oakland Bay Bridge, at the location of the Fremont Street off-ramp (previously known as the Terminal Separator Structure that once connected it to the Embarcadero Freeway). The two logs disagree as to whether the first of the signed Interstate, known as the San Francisco Skyway or Bayshore Viaduct, are actually part of the Interstate Highway System, although it is consistently shown as I-80 on most maps of San Francisco.