Davis is also well known for its bus service, Unitrans, and its trademark London double decker buses. It has been in operation since 1968 and is believed to be the only general purpose (non-sightseeing) transit system in the U.S. to operate vintage double deck buses in daily service. The system is operated and managed entirely by students and offers fixed-route transportation throughout the city. There is also an inter-campus bus service that ferries back and forth between UC Davis and UC Berkeley twice daily, from Monday to Friday. Davis is also one of the busiest stations of the Capitol Corridor intercity railroad service operated by Amtrak between the Bay Area and Sacramento. The central campus is bounded by freeways on two sides (Highway 113 and Interstate 80). All other UC campuses are either somewhat distant from the closest freeway or are directly adjacent to only one freeway. Two freeway exits are entirely within UCD's boundaries. One, off Highway 113, is signed "UC Davis / Hutchison Drive" and the other, off Interstate 80, is signed exclusively as "UC Davis." Despite the university's extensive bicycle infrastructure and public transportation service, easy freeway access coupled with increasing housing costs in the city of Davis has led to increased numbers of students commuting via automobile. Some students choose to live in the neighboring communities of Sacramento, Dixon or Woodland, and use their own cars or the county-wide Yolobus to get to UC Davis. In addition, a private charter bus that connected the Davis and Sacramento campuses was replaced in 2020 by the Causeway Connection bus service, in partnership with Yolobus and Sacramento Regional Transit. Other students also commute by motorcycle, but are also subject to similar parking rates as their four-wheeled counterparts. The California Aggie UC Davis publishes a weekly student newspaper, The California Aggie. The Aggie was first published in 1915 as the Weekly Agricola after its approval by the Associated Student Executive Committee. At this point, UC Davis was considered the University Farm, an extension of UC Berkeley. Initially, the Weekly Agricola was focused on both student news and farming-related topics. Novelist Jack London was one of the first readers of the Weekly Agricola. In 1922, it was renamed to match the school's athletic name. Between March 2014 and October 2016, the Aggie was not in print but was still accessible online. The Aggie is in print and available on campus again