SetTrafficLightState

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Sets the current traffic light state. This state controls the traffic light colors. For instance, state 1 will cause the north and south traffic lights to be amber, and the ones left and east will turn red.

Syntax

bool setTrafficLightState ( int state )
bool setTrafficLightState ( string state )
bool setTrafficLightState ( string colorNS, string colorEW )

Required Arguments

  • state: If an integer is provided, the state you wish to use (possible values: 0-9). Else, one of the following strings:
    • auto: Sets the traffic lights default behavior (switches the colors automatically).
    • disabled: Turns traffic lights off.

Alternatively, you can provide two string parameters (colorNS and colorEW) with the colors for north-south and east-west traffic lights respectively. Valid colors are:

  • green
  • yellow
  • red

Returns

Returns true if the state was successfully set, false otherwise.

Example

This example causes all traffic lights to be out of order. (flashing amber)

function handleTrafficLightsOutOfOrder()
    -- See if the lights are currently off
    local lightsOff = getTrafficLightState() == 9
    
    if lightsOff then
        -- If they're off, turn them on
        setTrafficLightState(6)
    else
        -- If they're on, turn them off
        setTrafficLightState(9)
    end
end
-- Repeat it every half a second
setTimer(handleTrafficLightsOutOfOrder,500,0)

See Also