An aid for detecting drowsiness of a driver of a vehicle

A detection system for detecting loss of concentration of a driver of a road going vehicle comprising a steering system extending between a steering wheel connected to a steering shaft and road engaging steered wheels of the vehicle, the detection system comprising;

• a controller mountable on the vehicle;
• a first movement sensor mountable on the vehicle, to sense movement of the steering system;
• the first sensor being connected to the controller to provide the controller with a first signal in response to movement of the steering system;
• the controller being configured to discriminate between an event of a first kind wherein movement sensed by the first sensor is caused by the steering wheel and an event of a second kind wherein movement sensed by the first sensor is induced by another source;
• and
• the controller being configured to generate an output signal if there has not been a event of the first kind for a first time period.