Here's a Tri-Vision® in action

References

One of the oldest, continually operating Tri-Vision® systems is also the world's largest.  This system, built by Werner in 1967, is installed on the Kennedy Expressway in Chicago Illinois.

This back-to-back sign incorporates a Werner Tri-Vision® display and a Whiteway electronic message center system.  The overall size of each face is 5,000 square feet.  The Tri-Vision® displays are each 32' by 60' in copy area.

Werner is very proud that this display, located at one of the windiest locations in the world, is still functioning flawlessly after 32 years of service in all types of weather conditions.  We estimate that this display has turned in excess of 200 million revolutions!