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Psychological responses of motorcar drivers to flashing amber lights at signalised T-intersections

Galappaththi, K.; Herath, O. K.; Bandara, Y. M.; Shaja, M. M. M.


K. Galappaththi

O. K. Herath

M. M. M. Shaja


The accurate and timely decision making of drivers is vital to ensuring public safety and reaching the destination in time. This paper presents a detailed comparison of the expectation of regulatory bodies in implementing flashing amber lights and explores the actual driver responses to flashing amber lights at a signalised T-intersection by taking speed variation as a proxy for their decision making. A survey was conducted at a signalised T-intersection during the operation of flashing amber lights to measure the speed variation. Time-distance and speed gun techniques were used to collect speed data of motor cars. Results reflect those drivers show only a marginal response to flashing amber lights. Therefore, the intention of regulatory bodies that vehicles maintaining lower speed at a T-intersection with flashing amber lights was not satisfactorily fulfilled. The marginal response of drivers to flashing amber lights can be a leading cause of accidents occurring in signalised T-intersections at odd (night) hours.

Journal Article Type Article
Online Publication Date Sep 24, 2021
Publication Date 2021
Deposit Date May 12, 2022
Publicly Available Date Jun 27, 2023
Journal Journal of South Asian logistics and transport
Peer Reviewed Peer Reviewed
Volume 1
Issue 2
Pages 19-33
Keywords Transport psychology, Driver behaviour, Driver utility, Safety, Flashing amber light signalling
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