The document is concerned with the benefits of various systems of co-ordinating traffic signals. Five different control schemes have been tested since the system became operative in November 1967. The fifth system, called Plident, did not incorporate any formal linking. Platoons of traffic on main roads were identified and their arrival times at downstream signals were predicted. Green times were adjusted to suit the length of platoons, up to possible 3-min. maximums. Substantial improvements in journey times were obtained when the Combination method and Transyt were compared with the system of linked and isolated vehicle-actuated signals which existed in Glasgow in 1967. Neither Flexiprog nor Equisat appeared to give a measurable improvement over the basic fixed-time linked system, Plident, the most elaborate and flexible of the systems tested, produced the longest average journey times recorded in the experiment. Details of the operation of Plident are given, with a discussion of future work and policies for implementing area traffic control. (Author)
The Glasgow Experiment: Plident and After
1971
18 pages
Report
No indication
English
Road Transportation , Traffic signals , Vehicular traffic control , Coordination , Automatic control , Traffic engineering , Computerized simulation , Systems engineering , Adaptive systems , Feasibility , Curve fitting , Great Britain , Pedestrians , Fixed time traffic control systems , Vehicle activated signal control systems , Plident traffic signal control systems
The Glasgow experiment : PLIDENT and after
TIBKAT | 1971
|Equipment in Glasgow experiment
Engineering Index Backfile | 1968
|Glasgow experiment -- Schemes and equipment
Engineering Index Backfile | 1967
|The Glasgow experiment : schemes and equipment
TIBKAT | 1967
|The Glasgow Experiment Schemes and Equipment
NTIS | 1967
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