Light-sound warning system of ail participants in road traffic solves the problem of safe and reliable signaling of a pedestrian on road, in a way that a driver who saw a pedestrian on the road activates the switch which transmits the information to other vehicles via radio signals, and signals to pedestrians with light and audio signals that there is a vehicle approaching. This system protects both the pedestrian, as well as the driver who first spotted the pedestrian because the vehicle driving behind the vehicle that first saw the pedestrian often does not observe the situation on time causing the collision with both the vehicle and the pedestrian. The value of this system is that the pedestrian is protected from incoming vehicles, the damage insurance claims to insurance companies are decreased, and the safety of drivers in traffic is increased because it reduces the possibility of fatal accidents. In addition, the auto industry gets more jobs and increased employment. The system is realized by connecting the following elements installed inside the vehicle: the central unit (2), the receiving- transmitting unit (4), the switch (6), the interior light signals (10), external audio signals (12) and the internal sound signals (14); while the exterior light system is (8) is installed on the outer periphery of the vehicle.