TY  - JOUR
PY  - 1962//
TI  - Some solutions of visibility and legibility problems in changeable speed command signs
JO  - Highway Research Board bulletin
A1  - Bauer, Herbert J.
SP  - 60
EP  - 68
VL  - 330
IS  - 
N2  - This report details the unusual, as well as the usual, design criteria specified for a discrete-bulb, matrix, speed command sign. Laboratory tests and various results are discussed. The interaction effects found among criteria meeting design specifications are pointed out. The speed command sign in use with the traffic pacer system in warren, mich., is the end product of the research. Specifications, sketches, and photographs, as well as research data, are included.<p />
LA  - 
SN  - 0073-2206
UR  - http://dx.doi.org/
ID  - ref1
ER  -