TY  - JOUR
PY  - 1985//
TI  - Optimal and minimal luminance characteristics for retroreflective highway signs
JO  - Transportation research record
A1  - Sivak, Michael
A1  - Olson, Paul L.
SP  - 53
EP  - 57
VL  - 1027
IS  - 
N2  - Presented in this paper are optimal and minimal sign luminance recommendations based on a review of available applied research. Optimal recommendations are based largely on peak luminance-legibility relationships. In the absence of other criteria, minimal recommendations are based on performance levels of 6 m/cm (20/23) for younger persons and 4.8 m/cm (20/29) for older persons. By using a computer sign legibility model, calculations were then made to determine the photometric characteristics of signing material required to obtain the values indicated.    Record URL:   http://onlinepubs.trb.org/Onlinepubs/trr/1985/1027/1027-011.pdf<p /> <p>Language: en</p>
LA  - en
SN  - 0361-1981
UR  - http://dx.doi.org/
ID  - ref1
ER  -