The effect of an active steering system on city bus drivers' muscle activity.

City bus drivers spend hours driving under time pressure, in congested traffic and in a monotonous sitting position. This leads to unhealthy working conditions, especially in terms of physical and psychological stress. The aim of this study is to investigate whether an active steering system can alleviate the musculoskeletal stress involved in manoeuvring a bus.

Evaluation of new speed limits in Sweden: a sample survey.

Objective: The study sought to estimate changes in actual driving speed occurring after new speed limits were introduced in Sweden's rural road network.

Method: The effects of speed limit changes were estimated for 7 groups of roads of different types and initial speed limits. To study the effects on the entire road network and not only at specific road sites, a sampling survey was conducted in which speed was measured at randomly selected sites before and after the speed limit changes.