STUDY OF TRAFFIC FLOW ON A RESTRICTED FACILITY. REPORT III-SUMMARY

The report concerns the accomplishments of the third, and final, phase of the project. Some limited tests proved that inductive loops taped to the side of the tunnel would adequately detect vehicle passage. Further analyses of the tunnel traffic flow and the signal control alternative were made. A platoon analysis recommended signal control using no control, 160-second cycle, and 120-second cycle depending on traffic conditions. Analysis of trucks showed that the number of passenger cars could be increased as much as 23 percent if the trucks were restricted from the tunnel. A simulation model was developed to analyze traffic flow through the tunnel. The model showed that improvements at the tunnel bottleneck will decrease travel time during peak flow; however, little change in travel time will occur during off-peak periods. A second simulation model evaluated the throughway system. Ramp metering and/or variable message signs with real-time surveillance would help reduce congestion. An overall control system hierarchy for the BHT system is feasible and should be investigated further.

  • Supplemental Notes:
    • Sponsored in part by Maryland State Highway Administration, Brooklandville. Bureau of Research. See also PB-282 513, PB-282 515, and PB-260 731.
  • Corporate Authors:

    University of Maryland, College Park

    Transportation Studies Center, Department of Civil Engineering
    College Park, MD  United States  20742

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    Maryland Department of Transportation

    Bureau of Research, 2323 West Joppa Road
    Brooklandville, MD  United States  21022
  • Authors:
    • Loutzenheiser, R C
    • Carter, Everett C
  • Publication Date: 1976-12

Media Info

  • Pagination: 103 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00180868
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FHWA-MD-R-77-8 Intrm Rpt., TSC-0020
  • Files: NTIS, TRIS, USDOT, STATEDOT
  • Created Date: Sep 14 1978 12:00AM