BART IMPACT PROGRAM: TRENDS IN TRAFFIC PATTERNS AT THE BAY BRIDGE AND CALDECOTT TUNNEL

Utilizing multiple regression techniques, this paper presents an analysis of the effects of the opening of the Bay Area Rapid Transit (BART) System's transbay crossing on the traffic at two major highway facilities, the San Francisco-Oakland Bay Bridge and the Caldecott Tunnel. Looking at data collected semi-annually since 1965, it was found that there was a sudden shift in trend lines in 1974 after the BART transbay tube was opened. Vehicle volumes dropped, transit patronage jumped, but total person trips in the short run followed roughly the trends of the previous eight years. Transbay vehicle and transit traffic has increased at a more rapid rate since 1974, with mid-day off-peak transit patronage showing a large increase. While an important temporary phenomenon, the 1973-74 increase in gasoline prices was not found to contribute much to this sudden change in the long-term trends. BART also caused the removal of a substantial number of buses from the two facilities, effectively increasing their vehicle-handling capacity. This has resulted in higher traffic flow rates during the height of the peak periods. (Color illustrations reproduced in black and white.)

  • Supplemental Notes:
    • Prepared in cooperation with Metropolitan Transportation Commission, Berkeley, Calif.
  • Corporate Authors:

    University of California, Berkeley

    Institute of Transportation Studies Library
    Berkeley, CA  USA  94720

    Metropolitan Transportation Commission

    Hotel Claremont
    Berkeley, CA  USA  94705

    Department of Transportation

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590

    Department of Housing and Urban Development

    451 7th Street, SW
    Washington, DC  USA  20410
  • Authors:
    • Homburger, W S
    • Dock, F C
  • Publication Date: 1977-7

Media Info

  • Pagination: 66 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00166501
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: DOT-BIP-WP-32-3-77
  • Contract Numbers: DOT-OS-30176
  • Files: NTIS, TRIS, USDOT
  • Created Date: Oct 29 1981 12:00AM