[Submitted on 20 Oct 2020]
Abstract: Rear-end collision accounts for around 8% of all vehicle crashes in the UK,
with the failure to notice or react to a brake light signal being a major
contributory cause. Meanwhile traditional incandescent brake light bulbs on
vehicles are increasingly being replaced by a profusion of designs featuring
LEDs. In this paper, we investigate the efficacy of brake light design using a
novel approach to recording subject reaction times in a simulation setting
using physical brake light assemblies. The reaction times of 22 subjects were
measured for ten pairs of LED and incandescent bulb brake lights. Three events
were investigated for each subject, namely the latency of brake light
activation to accelerator release (BrakeAcc), the latency of accelerator
release to brake pedal depression (AccPdl), and the cumulative time from light
activation to brake pedal depression (BrakePdl). To our knowledge, this is the
first study in which reaction times have been split into BrakeAcc and AccPdl.
Results indicate that the two brake lights containing incandescent bulbs led to
significantly slower reaction times compared to the tested eight LED lights.
BrakeAcc results also show that experienced subjects were quicker to respond to
the activation of brake lights by releasing the accelerator pedal.
Interestingly, the analysis also revealed that the type of brake light
influenced the AccPdl time, although experienced subjects did not always act
quicker than inexperienced subjects. Overall, the study found that different
designs of brake light can significantly influence driver response times.
From: Surej Mouli PhD [view email]
Tue, 20 Oct 2020 19:41:52 UTC (7,894 KB)