The conspicuity of pedestrians on unlit roads is dependent upon the colour of clothing worn and the illuminance of the object in the headlamp beam. There are practical methods for estimating conspicuity and the Paper covers a reconstruction of an incident where a similar vehicle was used to determine conspicuity on the approach to impact, using a calibrated camera, and the Adrian algorithm in PC-Rect. This was then contrasted with Dr Muttart’s Rules of Thumb for the perception of different types of clothing in the Grey Scale to consider consistency between the two methods. The Paper concludes that headlamp units deteriorate with age and suggests a simple method to generate the headlamp contours of the accident vehicle, to assist in determining the limitations on the actual driver’s opportunity of seeing a pedestrian.