Which of these factors has a decisive influence on the determination of the distance from the vehicle in front of us?

The decisive factor influencing the safe distance from the preceding vehicle is the speed at which we are travelling. The higher the speed, the longer the braking distance, which is why the gap must be significantly larger. According to Art. 19 of the Road Traffic Act, the driver is obliged to maintain the distance necessary to avoid a collision in the event that the preceding vehicle brakes or stops.