Samenvatting
The sensory deprivation affecting drivers on an empty motor- way is increased by fog, resulting in a sense of total isolation due to the loss of the visual stimuli required in order to remain alert. Such a condition often leads to a subconscious increase in speed, motivated by an instructive need for visual stimuli. In reviewing experiments on sensory deprivation and optical illusion reference is made to work carried out at the TRRL.