Guidelines on the Use of Changeable Message Signs: Summary Report
U.S. Department of Transportation, Federal Highway Administration, Office of Technology Applications, 1991 - Highway communications - 251 pages
This report is intended to provide guidance on 1) selection of the appropriate type of Changeable Message Sign (CMS) display, 2) the design and maintenance of CMSs to improve target value and motorist reception of messages, and 3) pitfalls to be avoided, and it updates information contained in the Manual. The guidelines and updated information are based on research results and on practices being employed by highway agencies in the United States, Canada and Western Europe.
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Selected LightReﬂecting Matrix Changeable Message Signs
Selected LightEmitting Matrix Changeable Message Signs
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bulb matrix CMSs candidate CMSs cathode ray tube Changeable Message Signs character height character module CMS legibility CMS technologies color contrast ratio cost Dimensional Square Disk Disk Matrix Sign electromechanical environmental conditions ﬁber optic CMSs Figure ﬁrst ﬁxed ﬂashed ﬂipped ﬂuorescent FO/RD font France freeway guidelines halogen lamp Highway 401 highway agencies highway applications illuminated incandescent bulb increase installed irradiation LED cluster LED lamps legend legibility characteristics legibility of light-emitting letter height Lexan light dot light guides light-emitting CMSs Light-Emitting Diode Light-Emitting Signs light-reﬂecting Liquid Crystal Display luminous intensity maintenance Manual on Real-Time manufacturer matrix CMS Ministry of Transportation Motorist Information Displays nighttime Ontario Ministry operation optic CMS pixels Real-Time Motorist Information reduce reﬂective disk signs shuttered ﬁber optic sign face sign luminance speciﬁes super bright LEDs symbols target value type of CMS United Kingdom value and legibility viewing face voltage West Germany western Europe