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Electronic Message Centers (EMC)


An electronic message center (EMC) is a sign that is capable of displaying words, symbols, figures or images that can be electronically changed by remote or automatic means.

Download ISA’s published research on Night-time Brightness Level Recommendations for On-Premise Electronic Message Centers.

These videos show examples of various EMC hold times (videos created and provided by Yesco Electronics).

This chart shows differences between EMCs and Billboards, providing a side-by-side comparison and contrast between on-premise and off-premise signs. Each type of sign has very distinct capabilities and purposes, each targets a specific audience and each has traditionally been treated under separate legal and regulatory regimes.

“The literature from ISA comparing a common Las Vegas size sign at 1,500 square feet compared to a normal size sign in most cities at 150 square feet proved to help them better understand that their city would never be like Las Vegas.”

Ricky Armstrong
Modern Signs, LLC