MAKING THE LEFT-TURNING DRIVER SAFE AT TRAFFIC SIGNALS

SICHERUNG DER LINKSABBIEGER AN LICHTSIGNALANLAGEN

IN PRACTICE VARIOUS METHODS ARE USED TO MAKE LEFT-TURNING TRAFFIC SAFE AT SIGNAL-CONTROLLED JUNCTIONS: FOR EXAMPLE, FREE LEFT-TURNING WITH PRESCRIBED TIME, PROHIBITED STANDARD TIME, ADDITIONAL TIME FOR THE DIRECTION HEAVILY LOADED WITH LEFT-TURNING VEHICLES USING GREEN ARROWS, LENGTHENING OF THE INTERIM PERIODS AND USE OF GREEN ARROWS, WARNING OF SIMULTANEOUSLY FREED MEETING TRAFFIC BY FLASHING YELLOW ARROWS, USE OF SPECIAL PHASES FOR LEFT-TURNING TRAFFIC. UP TO NOW THERE HAVE BEEN NO STUDIES WHICH PROVIDE INFORMATION AS TO WHICH OF THE SOLUTIONS APPLIED HITHERTO, TAKING ACCOUNT OF CURRENTLY PREDOMINANT BOUNDARY CONDITIONS, LEAD TO A REDUCTION IN DANGEROUS SITUATIONS AND ACCIDENTS INVOLVING LEFT-TURNING VEHICLES AND OTHER TRAFFIC. THE CONFLICT BETWEEN SAFETY AND CAPACITY IS ALSO TO BE TAKEN INTO ACCOUNT.