The traffic light is timed and lets cars pass during a specific time period. There is a pedestrial crossing button that lets pedestrians cross. The lights are connected to Port 1. You can see this in action using dScope.

traffic
.......\abstract.txt
.......\getline.c
.......\readme.c
.......\serial.c
.......\traffic.c
.......\traffic.dmo
.......\TRAFFIC.INC
.......\TRAFFIC.Opt
.......\TRAFFIC.Uv2

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