TRAFFIC SIGNALS: CAPACITY AND TIMING ANALYSIS

Traffic signal capacity and timing analysis techniques are presented as an aid for detailed geometric and operational design of signalised intersections. The report introduces several changes to the existing methods, a basic change being from "phase- related" methods to "movement- related" methods. A critical movement identification method is presented as a procedure which automatically satisfies minimum green time constraints and allows the use of different degrees of saturation for different movements. Detailed discussions of opposed turn, lane utilisation and short lane problems are presented in the section on saturation flows. New formulae are given for predicting delay, number of stops and queue length, which are applicable to both undersaturated and oversaturated conditions, and for calculating a practical cycle time and an approximate optimum cycle time using a stop penalty parameter. The prediction of operating characteristics and calculation of signal timings for vehicle- actuated and Co- ordinated signals are discussed separately in appendices. All other aspects of this report are applicable to both fixed- time and vehicle- actuated, isolated and Co- ordinated signals. Signal design questions in general, and the question of design period in particular, are discussed and a recommended design procedure which brings together various methods described in the report is given. Numerical examples are presented to illustrate the methods described in the report (a). The isbn of the microfiche is 0 86910 019 x. This report replaces the earlier arrb publications bulletin no 4 and arr no 79 (IRRD no 234157). (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0869100157
• Corporate Authors:

  ARRB

  Melbourne, Victoria  Australia 
• Authors:
  • Akcelik, R
• Publication Date: 1981-3

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: 109 p.
• Serial:
  • Publication of: Australian Road Research Board
  • Publisher: ARRB
  • ISSN: 1445-4467

Subject/Index Terms

• TRT Terms: Acceleration (Mechanics); Area traffic signal control; Bunching; Bus priority; Computer programs; Costs; Deceleration; Design; Forecasting; Fuel consumption; Geometric design; Highway capacity; Intersections; Optimization; Pedestrians; Pretimed traffic signal controllers; Queuing; Safety; Signalized intersections; Traffic actuated controllers; Traffic congestion; Traffic delays; Traffic flow; Traffic lanes; Traffic signal control systems; Traffic signal cycle; Traffic signal preemption; Traffic signal timing; Traffic signals; Turning traffic
• ITRD Terms: 5405: Acceleration; 669: Area traffic control; 652: Bunching; 643: Capacity (road, footway); 632: Congestion (traffic); 224: Cost; 5416: Deceleration; 9010: Delay; 9011: Design (overall design); 577: Fixed time (signals); 232: Fuel consumption; 455: Junction; 597: Linked signals; 1733: Pedestrian; 648: Priority (traffic); 6594: Queue; 1665: Safety; 8645: Software; 671: Traffic flow; 2827: Traffic lane; 565: Traffic signal; 1836: Turning; 557: Vehicle actuated
• Subject Areas: Design; Energy; Finance; Highways; Operations and Traffic Management; Pedestrians and Bicyclists; Public Transportation; Safety and Human Factors; I73: Traffic Control;

Filing Info

• Accession Number: 00342263
• Record Type: Publication
• Source Agency: ARRB
• ISBN: 0 86910 015 7
• Files: ITRD, TRIS, ATRI
• Created Date: Dec 22 1981 12:00AM