EFFECTIVENESS OF TRAFFIC SIGNALS FOR MAKING LEVEL CROSSINGS SAFE

WIRKSAMKEIT VON LICHTSIGNALANLAGEN ZUR SICHERUNG VON BAHNUEBERGAENGEN

TO DECREASE ACCIDENT RATES AT LEVEL CROSSINGS WITH FLASHING LIGHTS BUT WITHOUT HALF BARRIERS THERE IS A NEED FOR ACCURATE KNOWLEDGE OF THE BEHAVIOUR OF THE CAR DRIVER BEFORE THE CROSSING. A NEW MEASURING PROCEDURE WAS DEVELOPED WHICH ENABLES SPEED, BRAKING DECELERATION AND THE BRAKING PATH TO BE MEASURED CONTINUOUSLY OVER A FAIRLY LONG DISTANCE. AFTER DETERMINATION OF DRIVER BEHAVIOUR BEFORE SELECTED CROSSINGS, THESE CROSSINGS WERE EQUIPPED WITH RED FLASHING LIGHTS AND THEN A YELLOW AND A RED STEADY LIGHT, AND DRIVER BEHAVIOUR MEASURED AGAIN. FROM A COMPARISON OF THESE DATA A THEORY IS BEING DEVELOPED AS TO WHETHER A RED FLASHING LIGHT OR A YELLOW OR RED STEADY LIGHT IMPROVES SAFETY.