Program implementation functions: 1. East-west traffic release 30 seconds. What direction is north-south direction of the green and red lights lit for 30 seconds at the same time 2.30 seconds, four directions of East and West 3 flashing yellow light, blinking frequency is 0.5 seconds, to alert vehicles to switch traffic lights 3. The yellow light flashes four directions 3 times, 30 seconds to release North-South direction. What direction is north-south direction of the red and green light at the same time 30 seconds 4. North-south direction of release after 30 seconds, the four north-south direction to what the yellow light flashes 3 times to alert the traffic light switch 5. The yellow light flashes four directions 3 times, then released into east-west traffic for 30 seconds. So the cycle repeated.

TrafficSignalDesign.txt

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