Uncertainty analysis of a pavement reflectance measurement syste...

A pavement reflectance measurement system is established based on a gonio-photometerexisting by changing a bracket to carry the road sample and luminance meter, adding a collimated light source to provide incident light. This automated system could finish the reflection measurement of a road sample in 4 h. An uncertainty budget of this measurement system is made and the combined standard uncertainty of Q0 is 5.26%.