First standard developed by Standards Subcommittee of Inst of Traffic Engrs and approved by Am Standards Assn was standard for adjustable face signal heads; author describes development of standard and research which led to agreement on standard colors for lenses of traffic lights.
Standards for traffic control devices
Indus Standardization
Industrial Standardization ; 14 , n 4, Part I ; p 116-117
1943
2 pages
Article (Journal)
English
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