The aim of this study
was to examine and compare psychological factors influencing car drivers? and
motorcycle riders? speeding intentions (IN), using the Theory of Planned
Behaviour (TPB). The psychological factors modules included Attitude (AT),
Subjective Norm (SN) and Perceived Behavioural Control (PBC). These were
employed to explain speeding intentions in urban road environments. A sample of
188 car drivers and 174 motorcycle riders were collected from the two
universities within Khon Kaen, Thailand. The Structural Equation Model (SEM)
was used to examine and explain speeding intentions. The results indicated that
the TPB could explain 33% and 41% of the variance of intentions by car drivers
and motorcycle riders, respectively. The most significant psychological factor
for car drivers was determined by attitude (AT), while the speeding intention
of motorcycle riders was attributed to perceived behavioural control (PBC). The
authorities in Khon Kaen Province should determine safety policies that can
improve these psychological factors, which could have various effects or
outcomes on changing car drivers? and motorcycle riders? speeding intentions.
The outcome of this study could help to understand car drivers? and motorcycle
riders? speeding intentions in urban road environments and it could be useful
for development of safety measures.
