It would appear from publications on the subject that developments to improve isolated signal control fall broadly into two categories. Category I may be considered as stage-based control in which the microprocessor is used mainly to optimise the duration of the green time given to each signalstage. Category 2, in contrast, is more phase or signal-group oriented control in which the microprocessor is used mainly to provide flexiblesequences and combinations of signal groups. At present, from TRRL experience, it would seem unlikely that the commonly available microprocessors are powerful enough to combine fully the desirable features of both the above categories of strategy. TRRL research has concentrated up till now on Category 1 (stage-based) self-optimising control in the belief that this addresses itself more directly to the optimal timing of green for critical traffic movements; the phase-based flexibility of Category 2 control is often of benefit to non-critical rather than critical traffic movements. Also, the research by TRRL has been directed at signal control for intersections where traffic approaches at speeds up to about 35/miles/h (56 km/h) typical of UK urban areas with speed limits of 30 to 40 miles/h (48 to 64 km/h). Signal control where approach speeds are higher is discussed later.
Self-optimising traffic signal control using microprocessors - the TRRL 'Mova' strategy for isolated intersections
Selbstoptimierende Verkehrssignalsteuerung mittels Mikroprozessoren - die TRRL-MOVA-Strategie fuer isolierte Kreuzungen
1986
4 Seiten, 1 Tabelle, 9 Quellen
Conference paper
English
MOVA and LHOVRA: traffic signal control for isolated intersections
Online Contents | 1993
|'MOVA' isolated signal control-recent developments
Tema Archive | 1988
|MOVA control of isolated traffic signals-recent experience
Tema Archive | 1990
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