According to the UNI 10439:2001 standards, Table 3 shows
the classification of road surfaces: concrete pavement has 1.30
times more average luminance coefficient than asphalt pavement.
This difference decisively affects lighting design and costs. The
pavement class C1 includes all concrete pavements, so the examined
JPCP and CRCP solutions will give the same lighting results.
The average luminance coefficient Q0 is the average value of the
luminance coefficient q over a solid angle (X) (Eq. (1)) starting
from the road element under analysis and including all the light
rays providing a significant contribution to the luminance of the
element (Buraczynski et al., 2010; Giuliani, 2009). According to
the UNI 10439, q is the ratio between luminance and illuminance
of the road surface.