Recognition Distances and Understanding of Legends on an Experimental Motorway Signal

摘要

A new type of matrix signal is being considered to improve the effectiveness of the motorway signalling system. In addition to the advice given by the present signal, it would inform drivers of the nature and location of hazards. A prototype three-part signal has been built to display this information, and a number of pictograms have been designed for indicating the nature of the hazard. Measurements were made of the recognition distance of the three parts of the signal. The effect of a normal accumulation of road dirt on matrix signal recognition was assessed at the same time. The pictograms were tested to find out how effective they were in conveying the desired meaning to drivers who had not seen them before. (Copyright (c) Crown Copyright 1979.)