INTENSIVE TRAFFIC MANAGEMENT FOR CRITICAL ROADWAYS, PART I

From their opening, the traffic flowing in the Holland and Lincoln tunnels in New York has been managed intensively. The control system described in this paper may well be useful for traffic management in other tunnels but may not apply directly to surface arterials since tunnel traffic is probibited from changing lanes and these tunnels do not have any intermediate on- or off-ramps. The system consists of an automatic surveillance and control system and uses induction loop detectors, the output from which is processed in computers. A full description of the detection system and the computer system is given. There are two main functions of the automatic system. First, by examining three criteria on vehicle velocity, lane occupancy and vehicle headway at 15 second intervals, the system determines when a stoppage in the tunnel may have occurred. Second, by monitoring traffic density and traffic speed, signals at the entrance to a tunnel are adjusted in such a way so as to maximise the traffic flow through the tunnel. The rules for changing the traffic signals are explained in detail. /TRRL/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00410683
• Corporate Authors:

  Printerhall Limited

  29 Newmart Street
  London W1P 3PE,   England 
• Authors:
  • Foote, R S
• Publication Date: 1974-10

Language

• English

Media Info

• Features: Figures; Photos; References;
• Pagination: 5 p.
• Serial:
  • Traffic Engineering & Control
  • Volume: 15
  • Issue Number: 18
  • Publisher: Hemming Group, Limited
  • ISSN: 0041-0683
  • Serial URL: http://www.tecmagazine.com/

Subject/Index Terms

• TRT Terms: Automatic control; Automation; Digital computers; Highway operations; Highway traffic control; Lane occupancy; Loop detectors; Motor vehicles; Optimization; Sensors; Speed; Surveillance; Traffic control; Traffic density; Traffic flow; Traffic lanes; Traffic signal control systems; Traffic signals; Traffic speed; Traffic surveillance; Train track dynamics; Tunnels; Urban areas; Vehicle spacing; Vehicular tunnels
• Uncontrolled Terms: Optimum
• Geographic Terms: United States
• Old TRIS Terms: Traffic control systems; Tunnel traffic operations
• ITRD Terms: 3882: Automatic; 8673: Digital computer; 6120: Sensor; 5408: Speed; 9101: Surveillance; 673: Traffic concentration; 654: Traffic control; 671: Traffic flow; 2827: Traffic lane; 565: Traffic signal; 3374: Tunnel; 313: Urban area; 8122: USA; 694: Vehicle spacing
• Subject Areas: Bridges and other structures; Highways; Operations and Traffic Management; I73: Traffic Control;

Filing Info

• Accession Number: 00098108
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Oct 18 1975 12:00AM