This project investigated the feasibility and cost of moving towards a truly Safe System infrastructure. The key feature of such an infrastructure is that it be designed to preserve safety in the face of driver fallibility. The project first analysed the actual errors that drivers make. This provided an evidence-based means of assessing how effective different types, numbers and combinations of countermeasures are likely to be in mitigating the impact of the errors that drivers make. This in turn allowed an estimate to be made of the plausibility and cost of implementing various models that can be applied as various degrees of approximation to an error tolerant system in a particular road environment.
