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.
- Sponsored in part by Maryland State Highway Administration, Brooklandville. Bureau of Research. See also PB-282 513, PB-282 515, and PB-260 731.
University of Maryland, College ParkTransportation Studies Center, Department of Civil Engineering
College Park, MD United States 20742
Washington, DC United States 20590
Brooklandville, MD United States 21022
- Loutzenheiser, R C
- Carter, Everett C
- Publication Date: 1976-12
- Pagination: 103 p.
- TRT Terms: Data collection; Flow; Freeways; Highway capacity; Highway traffic; Markov processes; Mathematical models; Optimization; Passenger car equivalence; Simulation; Traffic control; Traffic engineering; Traffic flow; Traffic signal controllers; Traffic signals; Traffic surveys; Trucks; Tunnels; Vehicular tunnels
- Uncontrolled Terms: Flow rate
- Geographic Terms: Maryland
- Old TRIS Terms: Truck effect on highway capacity; Vehicular traffic
- Subject Areas: Bridges and other structures; Highways; Motor Carriers; Operations and Traffic Management;
- 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