For quantifying the amount of attention directed to different locations when moving with vehicles, the signal location task (SLT) was developed. Within this task, light points are mounted one after the other at different spatioal positions in video-recordings of a dynamic scenery. While presenting the video-movie, subjects have to detect these light points. Detection speed is measured reflecting the amount of attention put to the location where the light point was shown. In an experiment the SLT-method was used to investigate the influence of outdoor advertising on driving behaviour. The light points were placed on billboards, traffic signs, cars of other road users, and at irrelevant locations in the periphery ...