A vehicle's signals are encoded in an integer, each by one bit, encoding whether the according signal/... is on or off. Most signals are rather meant to be used by an external application. The following signals are special:
- "VEH_SIGNAL_BRAKELIGHT": computed each time step, used by the vehicles when trying to avoid jamming on an intersection. The value set via TraCI is only retained for the current time step
- "VEH_SIGNAL_BLINKER_RIGHT" and "VEH_SIGNAL_BLINKER_LEFT": computed each time step, The value set via TraCI is only retained for the current time step
- "VEH_SIGNAL_EMERGENCY_BLUE: when switched on, a blinking blue light is shown in the GUI for vehicles with vClass="emergency" and shapeClass="emergency"
The following table shows the defined signals.