Final Report Lot 9: Public street lighting - Amper

with,
Lav = QO x Eavg
Table 28: Average luminance coefficient (Q0): parameter values applied in this study
Class Q0 description mode of reflection
R1 0.1 concrete road or asphalt with minimum 12 % of
artificial brightener
R2 0.07 Asphalt (more info see standard) mixed
101
mostly diffuse
R3 0.07 Asphalt (more info see standard) slightly specular
R4 0.08 Asphalt (more info see standard) mostly specular
Results from the Expert inquiry are:
Cat. F
Table 29: Expert inquiry results
Cat. M Cat. S
% high Q0 % low Q0 % high Q0 % low Q0 % high Q0 % low Q0
reflection reflection reflection reflection reflection reflection
(concrete) (asphalt) (concrete) (asphalt) (concrete) (asphalt)
% 5 95 5 95 5 95
Typical 0.075 0.075 0.075
Q0
3.3.6 Road width
The road width is an important parameter for defining the road surface to be lit.
In order to have an overview of EU25 this question was included in the Expert inquiry (see
chapter 2).
- The received answers indicate almost the same (standardized) width for traffic lanes in the
different categories; for cat F we found 3,50 to 3,75m, for cat M 3,50m and for cat S 2,50m to
3,00m.
- The number of traffic lanes per direction was also asked for.
For category F, there are mostly 2 traffic lanes per direction (rarely 3, 4 or more lanes), for
category M and S mostly 1 lane per direction.
Conclusions from the Expert inquiry:
• For category F:
- 2 x 3,75m for the traffic lanes
- 1 x 2,5m for the hard shoulder.