Its possible. Simply take Hoop's flashing lights code, but edit the function to be for 'TLT_GREEN' or RED or YELLOW.
void EnableTrafficLight(TrafficLightType type_);
enum TrafficLightType
{
TLT_NONE,
TLT_GREEN,
TLT_YELLOW,
TLT_RED
};
NONE disables all of the relevant lights that you set as scene.
You can have TLT_GREEN as scene, RED as TA, YELLOW as interior, but the problem is, that the code can only disable all of the lights, and not any individually.