2019 California Standards for Accessible Design Guide (effective January 1, 2020 with July 1, 2021 amendments)
VARIABLE MESSAGE SIGN (VMS) CHARACTERS.
[DSA-AC] Characters of an electronic sign are composed of pixels in an array. High resolution VMS characters have vertical pixel counts of 16 rows or greater. Low resolution VMS characters have vertical pixel counts of 7 to 15 rows.
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