A three way intersection is in need of a traffic signal control system and you have been assigned the task to design and implement the system. Each direction has only one lane and one set of signal control lights (green, yellow and red). Your design should only allow one go or green light at a time. Further, all transitions from green to red should go through an intermediate 2-4 seconds yellow light. Your deliverables should include:

a) Sketch of the intersection with variables identified and respective values defined. Clearly describe any additional assumptions or rules you have added.

b) Document design with tools such as characteristic table, truth table, k-map, state diagram, physical layout, schematic and other as appropriate.

c) Implement the intersection control signal using LEDs to represent the lights and switches to represent arrival and departure of cars.