A prototype instrument for the measurement of road surface reflection properties
نویسنده
چکیده
The note “Beskrivelse af et bærbart instrument til måling af vejbelægningers refleksionsegenskaber” (in Danish) explains that the two values of the reduced luminance coefficient, r1 and r2, of a road surface lead to the both of the characteristic values for the reflection properties of road surfaces. These are the specular factor S1 and the average reflection measured by either the average luminance coefficient Q0 or the luminance coefficient under diffuse illumination Qd. S1 is the ratio r2/r1, while Q0 and Qd are derived by means of linear expressions in r1 and r2.
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