Shift work round the clock in supervision and control: schedules of rewarded and unrewarded time.

In determining the optimum allocation of time between work and leisure activities, this paper focuses on the practical goal of compatibility of the physiological limitations with the social expectations of the employees involved, and examines the subsequent acceptance of the various schedules proposed.

Improving flow and safety upon roads by unorthodox layout.

When roads have at least two lanes, overtaking has to take place exclusively within these two lanes, and intruding into the opposite stream when overtaking is strictly forbidden. As a result, a completely new situation emerges - the situation of two neighbouring one-way roads. Examples are given on how to treat them separately for improving flow and safety in carefully selected situations.