This is a traffic light display prototype I was hired to work on. The concept is that the traffic light works in concert with an LED matrix display. The graphics alert drivers to emergency vehicles trying to cross the given intersection. Also there is a countdown related to the light changing, similar to some crosswalks.

The 3 LED matrix displays and the display driver(built around a PIC18F26K22) came from Embedded Adventures. The small traffic light is from Banner. I added functionality to the driver library to handle the displays in this new configuration, wrote an app to convert custom fonts and graphics to the format needed by the library, and setup the unit to respond to serial commands over a USB cable for the demo presentation.