The 9-Inch Matrix Display Radar Driver Feedback Sign from TraffiCalm Systems displays numeric, text and emoticon electronic messages to drivers. Each sign comes with a “Slow Down” message and MUTCD R2-1 compliant 18 x 24 in. configuration in a slim 1 7/8 in. depth with two 9 in.-high LED highway gothic numerals. The fully enclosed electronic control system can be easily removed from the mounting frame as a complete unit for quick and simplified installation.