THE DEVELOPMENT OF ALTERNATIVE MODELS FOR CARRYING OUT A STUDY INTO THE EFFECTS OF BANNING STUDDED TYRES

ENTWICKLUNG ALTERNATIVER MODELLE ZUR DURCHFUEHRUNG EINER UNTERSUCHUNG UEBER DIE AUSWIRKUNG DES VERBOTS VON SPIKES-REIFEN

IN THE COURSE OF THE STUDY DATA ON ROAD TRAFFIC ACCIDENTS, TRAFFIC VOLUMES, ROAD CONDITIONS, WINTER MAINTENANCE AND GENERAL METEOROLOGICAL CONDITIONS WERE ANALYSED IN RELATION TO THEIR USEFULNESS FOR THE STUDY. THE MAIN POINT TO BE STUDIED WAS THE BANNING OF STUDDED TYRES IN A BEFORE AND AFTER ANALYSIS OF TRAFFIC SAFETY. BECAUSE OF THE VARYING LENGTHS AND SEVERITY OF DIFFERENT WINTER PERIODS, THE FIGURES WERE BASED ON THE DAILY TRAFFIC FLOWS AND THE TRAFFIC CONDITIONS FOR EACH PARTICULAR DAY. FOR THE SECTIONS OF MOTORWAY STUDIED IN BAVARIA, SUFFICIENT LONGTERM OFFICIAL FIGURES WERE AVAILABLE. FOR REASONS OF ECONOMY THE SECTIONS BETWEEN TWO JUNCTIONS WERE TAKEN AS UNITS.