A non-separated concurrent-flow lane was instituted on Boston's Southeast Expressway on May 4, 1977. An eight-mile section of the left-most inbound lane was reserved for buses and carpools of three or more persons between the hours of 6:30 a.m. and 9:30 a.m. There were no official intermediate points of access or egress, removable plstic inserts were used to separate the lane from the other northbound lanes, and compliance was voluntary until October 17, 1977. Construction on a portion of the roadway began in June, 1977, reducing capacity at that point by about 25 percent. The report describes the project development, implementation, and operations and addresses impacts in the following areas: travel times on the Expressway and alternate routes; transportation system use patterns; cost of express lane operation; violations, enforcement,and safety; and institutions and attitudes. By the end of the project the Expressway was carrying eight percent fewer people while the number of automobiles had declined 16 percent, reflecting a 71 percent increase in the number of carpools. Bus ridership increased by only 5 to 6 percent while ridership on rapid rail increased by 12 percent. Travel times were lower during the summer months for all Expressway users, but during the enforcement period an average trip in the general lanes took 7.5 minutes longer. The violation rate fell from 80 percent to 35 percent when enforcement was initiated. /Author/

  • Availability:
  • Supplemental Notes:
    • Sponsored by the Department of Transportation, Urban Mass Transportation Administration.
  • Corporate Authors:

    Transportation Systems Center

    55 Broadway, Kendall Square
    Cambridge, MA  United States  02142
  • Authors:
    • Simkowitz, H
  • Publication Date: 1978-5

Media Info

  • Features: Figures; Tables;
  • Pagination: 76 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00185382
  • Record Type: Publication
  • ISBN: UM827/R8712
  • Report/Paper Numbers: UMTA-MA-06-0049-78-4Final Rpt.
  • Files: TRIS
  • Created Date: Feb 3 1981 12:00AM