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Standards Development
This document provides specifications for two types of variable message signs (VMS); i.e., continuous (see 3.3) and discontinuous (see 3.6).
This document covers permanently installed VMS used in circulation areas, on public and private land, including tunnels for the information, guidance, warning and/or direction of traffic. Test modules are used to demonstrate compliance with the requirements.
This document specifies visual and physical characteristics of VMS as well as their durability aspects. It also provides relevant requirements and corresponding test methods, assessment, and verification of constancy of performance (AVCP) and marking.
NOTE Provisions for the evaluation of conformity with regards to type testing are further specified in 6.2; provisions with regards to factory production control (FPC) are further specified in 6.3.1.
This document does not cover:
a) sign gantries, cantilevers, posts (supports) and foundations,
b) signal heads,
c) sizes and shapes of VMS messages,
d) control units and monitoring units unless inside the VMS,
e) control of sign luminance
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