A device to measure road reflection in situ.

It has been generally accepted that road lighting design should be based on the luminance concept. This requires a.o. data on the light distribution of the luminaires (the I-table) and the reflection characteristics of the road surface to be used (the R-table). Applying the recently introduced two-class mad surface classification system (C-system) the relevant R-table can be selected if only three refection values known. The device described here allows the measurement in situ of P (0;0) (or qp); P (2;0) and P (1;90) on the actual road surface, during the daytime and without undue disturbance of the traffic on the road.