Abstract
This paper describes research into a driver impairment monitoring (DIM) system under development in the DETER project. The aim of this research is to demonstrate the feasibility of a system which detects a decline of psychological capability, purely on the basis of in-vehicle measurement. Three areas of research are described: the first describes how in-vehicle data is quantified and correlated with psychophysiological activity during an experimental study, the second deals with the use of neural net algorithms to model driving behaviour, the final piece of research provides some preliminary data on user acceptability issues.