Method and apparatus for obtaining traffic flow velocity data

• US 3,290,490 A
• Filed: 02/21/1966
• Issued: 12/06/1966
• Est. Priority Date: 02/21/1966
• Status: Expired due to Term

• Current Assignee: Auer, John H. Jr.
• Original Assignee: Auer, John H. Jr.
• Inventors: Auer, John H. Jr.
• Application Number:
  US04/540,116
• Time in Patent Office: 288 Days
• US Class Current: 701/119
• CPC Class Codes: G08G 1/0104 Measuring and analyzing of parameters relative to traffic conditions

Claims

28. APPARATUS FOR MEASURING VEHICULAR FLOW VELOCITY COMPRISING IN COMBINATION, MEANS RESPONSIVE TO THE PRESENCE OF EACH PASSING VEHICLE WITHIN A DEFINED DETECTION ZONE ALONG A HIGHWAY FOR DEMARCATING THE OCCUPANCY TIME OF SAID VEHICLE IN SAID DETECTION ZONE, STORAGE MEANS FOR STORING A PARAMETER WHOSE MAGNITUDE IS REPRESENTATIVE OF FLOW VELOCITY, MEANS RESPONSIVE TO EACH VEHICLE FOR ALGEBRAICALLY ADDING TO THE THEN-EXISTING VALUE OF THE FLOW VELOCITY PARAMETER STORED IN SAID STORAGE MEANS IN ACCORDANCE WITH THE DIFFERENCE BETWEEN SAID THEN-EXISTING VALUE OF SAID FLOW VELOCITY AND AN INDIRECTLY MEASURED VELOCITY VALUE FOR SAID PASSING VEHICLE, AND MEANS RESPONSIVE TO SAID OCCUPANCY TIME DEMARCATED BY SAID PRESENCE RESPONSIVE MEANS FOR PROVIDING FOR EACH PASSING VEHICLE SAID INDIRECTLY MEASURED VELOCITY VALUE.