Control traffic LEDs through IR Sensors to dynamically turn green light on or off based on the number of vehicles using Python on Raspberry Pi

index.py

from time import sleep
from signal import pause
from gpiozero import LED, MotionSensor

ledNorthRed = LED(21)
ledNorthYellow = LED(20)
ledNorthGreen = LED(16)

ledSouthRed = LED(26)
ledSouthYellow = LED(19)
ledSouthGreen = LED(13)

ledEastRed = LED(22)
ledEastYellow = LED(27)
ledEastGreen = LED(17)

ledWestRed = LED(25)
ledWestYellow = LED(24)
ledWestGreen = LED(23)

sensorNorth = MotionSensor(12)
sensorSouth = MotionSensor(6)
sensorEast = MotionSensor(4)
sensorWest = MotionSensor(18)

trafficNorthCount = 0
trafficSouthCount = 0
trafficEastCount = 0
trafficWestCount = 0

def blinkAllLeds():
    ledNorthRed.blink()
    ledNorthYellow.blink()
    ledNorthGreen.blink()

    ledSouthRed.blink()
    ledSouthYellow.blink()
    ledSouthGreen.blink()

    ledEastRed.blink()
    ledEastYellow.blink()
    ledEastGreen.blink()

    ledWestRed.blink()
    ledWestYellow.blink()
    ledWestGreen.blink()

def onAllLeds():
    ledNorthRed.on()
    ledNorthYellow.on()
    ledNorthGreen.on()

    ledSouthRed.on()
    ledSouthYellow.on()
    ledSouthGreen.on()

    ledEastRed.on()
    ledEastYellow.on()
    ledEastGreen.on()

    ledWestRed.on()
    ledWestYellow.on()
    ledWestGreen.on()

def offAllLeds():
    ledNorthRed.off()
    ledNorthYellow.off()
    ledNorthGreen.off()

    ledSouthRed.off()
    ledSouthYellow.off()
    ledSouthGreen.off()

    ledEastRed.off()
    ledEastYellow.off()
    ledEastGreen.off()

    ledWestRed.off()
    ledWestYellow.off()
    ledWestGreen.off()

def turnOnNorthLeds():
    ledNorthRed.off()

    ledNorthGreen.on()

def turnOffNorthLeds():
    ledNorthYellow.blink()

    sleep(2)

    ledNorthYellow.off()
    ledNorthGreen.off()
    ledNorthRed.on()

def turnOnSouthLeds():
    ledSouthRed.off()

    ledSouthGreen.on()

def turnOffSouthLeds():
    ledSouthYellow.blink()

    sleep(2)

    ledSouthYellow.off()
    ledSouthGreen.off()
    ledSouthRed.on()

def turnOnEastLeds():
    ledEastRed.off()

    ledEastGreen.on()

def turnOffEastLeds():
    ledEastYellow.blink()
    
    sleep(2)

    ledEastYellow.off()
    ledEastGreen.off()
    ledEastRed.on()

def turnOnWestLeds():
    ledWestRed.off()

    ledWestGreen.on()

def turnOffWestLeds():
    ledWestYellow.blink()

    sleep(2)

    ledWestYellow.off()
    ledWestGreen.off()
    ledWestRed.on()

def turnOnAllRed():
    ledNorthRed.on()
    ledSouthRed.on()
    ledEastRed.on()
    ledWestRed.on()

def turnOffAllRed():
    ledNorthRed.off()
    ledSouthRed.off()
    ledEastRed.off()
    ledWestRed.off()

def blinkAllYellow():
    ledNorthYellow.blink()
    ledSouthYellow.blink()
    ledEastYellow.blink()
    ledWestYellow.blink()

def turnOffAllYellow():
    ledNorthYellow.off()
    ledSouthYellow.off()
    ledEastYellow.off()
    ledWestYellow.off()

def trafficNorthCounter():
    global trafficNorthCount

    trafficNorthCount += 1

def trafficSouthCounter():
    global trafficSouthCount

    trafficSouthCount += 1

def trafficEastCounter():
    global trafficEastCount

    trafficEastCount += 1

def trafficWestCounter():
    global trafficWestCount

    trafficWestCount += 1

def trafficNorthCounterReset():
    global trafficNorthCount

    trafficNorthCount = 0

def trafficSouthCounterReset():
    global trafficSouthCount

    trafficSouthCount = 0

def trafficEastCounterReset():
    global trafficEastCount

    trafficEastCount = 0

def trafficWestCounterReset():
    global trafficWestCount

    trafficWestCount = 0

#blinkAllLeds()
#offAllLeds()
#pause()

sensorNorth.when_no_motion = trafficNorthCounter
sensorSouth.when_no_motion = trafficSouthCounter
sensorEast.when_no_motion = trafficEastCounter
sensorWest.when_no_motion = trafficWestCounter

while True:
    if trafficNorthCount > trafficSouthCount or trafficNorthCount > trafficEastCount or trafficNorthCount > trafficWestCount:
        blinkAllYellow()
        turnOnAllRed()
        turnOffAllYellow()

        turnOnNorthLeds()

        sleep(5)

        trafficNorthCounterReset()
        turnOffNorthLeds()
    elif trafficSouthCount > trafficNorthCount or trafficSouthCount > trafficEastCount or trafficSouthCount > trafficWestCount:
        blinkAllYellow()
        turnOnAllRed()
        turnOffAllYellow()

        turnOnSouthLeds()

        sleep(5)

        trafficSouthCounterReset()
        turnOffSouthLeds()
    elif trafficEastCount > trafficNorthCount or trafficEastCount > trafficSouthCount or trafficEastCount > trafficWestCount:
        blinkAllYellow()
        turnOnAllRed()
        turnOffAllYellow()

        turnOnEastLeds()

        sleep(5)

        trafficEastCounterReset()
        turnOffEastLeds()
    elif trafficWestCount > trafficNorthCount or trafficWestCount > trafficSouthCount or trafficWestCount > trafficEastCount:
        blinkAllYellow()
        turnOnAllRed()
        turnOffAllYellow()

        turnOnWestLeds()

        sleep(5)

        trafficWestCounterReset()
        turnOffWestLeds()
    else:
        turnOnAllRed()

        ledNorthYellow.blink()
        sleep(2)
        ledNorthYellow.off()

        turnOnNorthLeds()
        sleep(5)
        turnOffNorthLeds()

        ledSouthYellow.blink()
        sleep(2)
        ledSouthYellow.off()

        turnOnSouthLeds()
        sleep(5)
        turnOffSouthLeds()

        ledEastYellow.blink()
        sleep(2)
        ledEastYellow.off()

        turnOnEastLeds()
        sleep(5)
        turnOffEastLeds()

        ledWestYellow.blink()
        sleep(2)
        ledWestYellow.off()

        turnOnWestLeds()
        sleep(5)
        turnOffWestLeds()