A survey of the actual traffic situation as to its volume and in particular with respect to the relation between lighting conditions and accident rate, has been given in chapter 1. This survey serves to define the problem studied in this thesis, namely measuring the link between photometric parameters and visual performance. Chapters 2 and 3 give a detailed description of the preparation of the experiments and the procedures followed in carrying them out. They were aimed at the determination of visibility distance in real traffic conditions prevailing on three sites of motorways in Greece for a variety of photometric parameters of the lighting installations. Moreover, these parameters have been subjectively appraised. In chapter 4, the results have been analysed and the conclusions drawn from these results are presented in chapter 5. Finally chapter 6 contains comments as to the possibility of specifying road lighting quality taking into consideration the results obtained within the framework of the viewpoints on visual performance developed in CIE committees. (Author/publisher)
Abstract