Research Into the Relative Merits of Roundabouts and Traffic-Signal Controlled Intersections.

Webster, F; Newby, R F; Rrl,

doi:10.1680/iicep.1964.10370

Cited by 4 publications

(1 citation statement)

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“…Although there seems to be a consensus among relevant studies (Roess and Messer, 1986;Kimber and Hollis, 1979;Federal Highway Administration, 1986;Webster and Newby, 1964;Akcelic, 1988) that in cases of high traffic flows the signalisation of an intersection leads to the decrease of overall delay and the increase of overall capacity, no such agreement exists about the effect of signalisation on traffic safety. Numerous studies on the effect of signalisation on junction safety have been carried out in the U.S.A.…”

Section: The Installationmentioning

confidence: 99%

Effects of signalisation on four-arm urban junction safety

Golias

1997

Accident Analysis & Prevention

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Abstract-This paper investigates the effect of signalisation on safety of urban priority controlled four-arm junctions. Forty-eight such junctions were carefully selected to have different values for the geometric and traffic characteristics that may influence the safety effects of signalisation. Long periods before and after signalisation were considered so that the effect of the regression to the mean phenomenon becomes negligible. Signalisation was found either to increase the junction safety or to leave it unchanged. Discriminant analysis showed that among numerous variables considered those significantly influencing the effects of signalisation on safety are the flow weighted average width per arm, the flow weighted average grade per stream, and a function of the product of the conflicting stream flows of the junction. The discriminant function developed predicts quite satisfactorily the behaviour of junction safety after signalisation. 0 1997 Elsevier Science Ltd. All rights reserved

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Section: The Installationmentioning

confidence: 99%