Intersection traffic controller

Claim 1

A TRAFFIC CONTROL DEVICE FOR REGULATING VEHICULAR FLOW IN A PRIMARY AND SECONDARY DIRECTION AT AN INTERSECTION, THE VEHICULAR FLOW IN EACH DIRECTION INTERFERING WITH TRAFFIC FLOW IN THE OTHER DIRECTION, COMPRISING: FIRST AND SECOND DETECTING MEANS FOR SENSING THE PRESENCE OF VEHICLES AND FOR PROVIDING SEPARATE FIRST AND SECOND OUTPUT SIGNAL LEVELS INDICATIVE OF THE NUMBER OF VEHICLES APPROACHING THE INTERSECTION IN SAID PRIMARY AND SECONDARY DIRECTIONS, RESPECTIVELY; FIRST AND SECOND TIME AVERAGING CIRCUITS COUPLED TO RECEIVE THE FIRST AND SECOND OUTPUT SIGNALS LEVELS AND FOR PROVIDING SEPARATE FIRST AND SECOND AVERAGED VOLTAGE LEVELS PROPORTIONAL TO A TIME AVERAGE OF THE NUMBER OF VEHICLE APPROACHING IN EITHER DIRECTION; A PRESET VOLTAGE LEVEL SOURCE; FIRST SIGNAL COMPARING MEANS COUPLED TO RECEIVE THE PRESET VOLTAGE LEVEL FROM SAID SOURCE AND THE AVERAGED VOLTAGE LEVEL FROM SAID FIRST TIME AVERAGING CIRCUIT; A FIRST TRAFFIC CONTROL SIGNAL FOR FORBIDDING TRAFFIC FLOW IN THE SECONDARY DIRECTION COUPLED TO SAID FIRST COMPARING MEANS TO BE ACTUATED WHENEVER THE FIRST AVERAGED VOLTAGE LEVEL FROM SAID FIRST TIME AVERAGING CIRCUIT EXCEEDS SAID PRESET LEVEL; SECOND SIGNAL COMPARING MEANS COUPLED TO RECEIVE THE AVERAGE VOLTAGE LEVELS FROM THE FIRST AND SECOND TIME AVERAGING CIRCUITS AND FOR PROVIDING AN ACTUATING SIGNAL WHENEVER THE OUTPUT VOLTAGE LEVEL FROM SAID SECOND TIME AVERAGING CIRCUIT IS GREATER THAN THE OUTPUT VOLTAGE LEVEL FROM SAID FIRST TIME AVERAGING CIRCUIT; GATING MEANS RESPONSIVE TO AN ENABLING SIGNAL FOR PASSING THE ACTUATING SIGNAL FROM THE SECOND COMPARING MEANS, SAID FIRST COMPARING MEANS PROVIDING AN ENABLING SIGNAL TO SAID GATING MEANS WHENEVER THE FIRST AVERAGED VOLTAGE LEVEL IS LESS THAN THE PRESET VOLTAGE LEVEL; AND A SECOND TRAFFIC CONTROL SIGNAL COUPLED TO THE OUTPUT OF SAID GATING MEANS AND RESPONSIVE TO THE ACTUATING SIGNAL PASSED BY THE GATING MEANS TO STOP TRAFFIC IN THE SAID PRIMARY DIRECTION AND PERMIT TRAFFIC FLOW IN SAID SECONDARY DIRECTION.