This thesis reports five studies that investigate the impact of trust on driver response to
forward collision warning systems (FCWS). The experiments, while self-contained were
conceived to relate together in a cohesive way.
The first three studies investigated the relationship between alarm timing and driver
performance in collision situations in a broad range of driving conditions. These studies
also established trust models describing changes in driver subjective ratings of trust in
response to alarm timing. It was found that an early alarm timing led to quick braking
reaction times, resulting from prompt accelerator release. A middle alarm timing induced
more consistent braking response than a control condition in which no alarms were
presented. A late alarm timing had the potential to delay braking response when driving
with long time headways. With respect to trust, early alarm timings induced higher levels
of trust than late or middle alarm timings. Moreover the results suggest that the conflict
between driver expectation of alarm performance and actual alarm timing results in
decreased trust. [Continues.]
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.