Guidelines on the Use and Operation of Changeable Message Signs
Texas Transportation Institute, The Texas A&M University, 1992 - Highway communications - 101 pages
This report is intended to be a primer on the characteristics that affect the design, use and operations of changeable message signs (CMSs), and to provide guidance on the selection of the appropriate type of CMS display. Guidelines on the selection and design of CMS messages are presented in a companion report, Report No. FHWA/TX-92/1232-10 entitled "Guidelines on the Selection and Design of Messages for Changeable Message Signs". This report is an update and consolidation of the following reports: (1) C.L. Dudek and R.D. Huchingson, "Manual on Real-Time Motorist Information Displays", FHWA-IP-86-16, August 1986; (2) C.L. Dudek, "Guidelines on the Use of Changeable Message Signs", FHWA-TS-90-043, May 1991; and (3) C.L. Dudek, "Portable Changeable Message Signs at Work Zones", FHWA/TX-85/07+292-4, July 1984.
What people are saying - Write a review
We haven't found any reviews in the usual places.
Fiber Optics Matrix Sign Fixed Grid
6 other sections not shown
4.0 seconds background Beam Splitter bulb matrix C.L. Dudek Changeable Message Signs character heights CMS technologies contrast ratio cost Disk Matrix Sign drivers drum electromechanical Fiber ﬁber optic ﬁeld Figure ﬁrst ﬁxed ﬂashed freeway guide signs Guidelines halogen lamps highway agency Human Factors illuminated inches inﬂuenced lane LED Cluster LED lamps legend legibility distance Lexan light guides light source light-emitting CMSs Light-emitting diode lighting conditions Location luminance luminous intensity maintenance matrix CMSs Message Display message elements message exposure minimum Ministry of Transportation module Motorist Information Displays nighttime Ontario Ministry operation pixels problem R.D. Huchingson Real-Time Motorist Information recommended reﬂective disk signs Report rotating route run-on seconds exposure sequence sequential sign face sign message sign panel spacing speciﬁc speed static signs target value Texas Transportation Institute trafﬁc types of CMSs United Kingdom value and legibility Variable Message Signs viewing face visibility