STUDY OF TRAFFIC FLOW ON A RESTRICTED FACILITY
The three-phase project has utilized the Baltimore Harbor tunnel for field study and this report summarizes the accomplishments of all three phases. The expected major benefits of the research project was the capability of applying traffic flow theory concepts to the actual operation of highway facilities, particularly restricted facilities. Limited surveillance and control showed that a mainline control signal upstream of the tunnel entrance can operate at a fixed rate and increase throughput while increasing average speed. Further analysis of the tunnel traffic flow characteristics should produce methods to further optimize flow through the tunnel. A real-time data acquisition system using inductive loops is necessary in the tunnel and along the throughway. A minicomputer located at the tunnel should be used to analyze the data and develop an overall control system hierachy. Such control would probably include input ramp control, mainline control and variable message signs. Traffic flow theory can be applied to improve operations on restricted facilities.
- Sponsored in part by Maryland State Highway Administration, Brooklandville. Bureau of Research. See also PB-282 514.
University of Maryland, College ParkTransportation Studies Center, Department of Civil Engineering
College Park, MD USA 20742
Washington, DC USA 20590
Brooklandville, MD USA 21022
- Carter, Everett C
- Loutzenheiser, R C
- Publication Date: 1977-1
- Pagination: 40 p.
- TRT Terms: Field studies; Flow; Freeways; Highway traffic; Markov processes; Mathematical models; Minicomputers; Optimization; Ramps; Traffic control; Traffic engineering; Traffic flow; Traffic signals; Traffic surveys; Tunnels; Variable message signs; Vehicular tunnels
- Uncontrolled Terms: Flow rate
- Geographic Terms: Maryland
- Old TRIS Terms: Traffic control systems; Vehicular traffic
- Subject Areas: Bridges and other structures; Highways; Operations and Traffic Management;
- Accession Number: 00180869
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: HS-024 606, TSC-0021
- Files: NTIS, TRIS, USDOT, STATEDOT
- Created Date: Sep 14 1989 12:00AM