The problem of highway vehicles encroaching, hitting, and breaching the barriers separating rapid transit rail lines from highways in what are termed "common corridor" locations is an issue of concern. As planning proceeds for transit systems which may be located in common corridors, the number and severity of vehicle intrusions into the rail facilities must be accounted for. This problem was addressed at the time the original design of Metro facilities within Route I-66 was developed; however, in view of advances in the state of the art of highway and rail transit design since 1978, constructive alternatives for further ensuring cost-effective safety measures should be examined and, if funding permits, implemented. The desirability of a continuing review of Metro patron safety measures was highlighted on November 7, 1983, when a highway vehicle hit and breached a 32-inch grade beam barrier, landing on the Metrorail Right-of-Way (ROW), obstructing both inbound and outbound tracks. The system was not operational at the time, and only minor injuries were sustained by the driver. Upon completion of an initial investigation of the accident, the Washington Metropolitan Area Transit Authority (WMATA) requested that their General Engineering Consultant (GEC) conduct an analysis of the I-66 Metro common corridor for the purposes of predicting the likelihood of future breaches and providing alternatives for further enhancement of the safety of this portion of the Metro system. The intention of this report is to comply with WMATA's request by achieving the following objectives: document instances of barrier hits by highway vehicles and predict the potential for barrier breaches in the I-66 Metro common corridor based on current research and statistics; arrive at conclusions based on the evaluation of current barrier performance and predictions of barrier breaches in the I-66 Metro common corridor; and provide alternatives for further increasing patron safety in the I-66 Metro common corridor. (Author)

  • Corporate Authors:

    De Leuw, Cather and Company

    1201 Connecticut Avenue, NW
    Washington, DC  United States  20036
  • Publication Date: 1984-5

Media Info

  • Features: Appendices; Figures; Tables;
  • Pagination: 52 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00389941
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 30 1984 12:00AM