Introduction:
Model VMS 500L variable message sign by McCain provides 25
rows by 96 columns of 1.5" diameter pixels spaced 2.75"
center to center. It sets the standard for modularity, wiring
simplicity, reliability, serviceability, and performance
of for freeway applications, where long viewing distances
are required. Standard dot matrix character heights are 18"
(3 rows), 23.5" (2 rows), and 31.75" (2 rows).