TY  - JOUR
PY  - 1951//
TI  - Field and laboratory evaluation of roadside sign surfacing materials
JO  - Highway Research Board bulletin
A1  - Havens, James H.
A1  - Peed, Allie C.
SP  - 32
EP  - 44
VL  - 43
IS  - 
N2  - Physical and optical characteristics of sign materials and design and application of a reflectometer devised by the Kentucky department of highways are discussed. Accelerated weathering procedures and specification standards are described. Field studies paralleling laboratory work and a possible correlation between the two are described. The field work included several thousand individual observations covering 30 different sign-surface types under actual conditions on a night-visibility driving-course. Most of the major types of surfaces available were represented. In addition to using ordinary sealed-beam headlamps, field observations were made using polarized headlamps and viewers.<p />
LA  - en
SN  - 0073-2206
UR  - http://dx.doi.org/
ID  - ref1
ER  -