![]() ![]() A switching circuit responsive to the detectors then identifies UNITED STATES PATENTS and counts only those vehicles passing one complete sequence of the positions identifying a particular path. A television camera can view the intersection and the paths be identified on a receiving cathode ray tube screen by References Cited placing a series of light detectors over desired patterns. Cl.C08g 1/04 through an intersection as a vehicle passes over a Predeter' Field of Search 40/38 R 38 L 38 p 22 23 mined sequence of discrete separated positions identifying a 340/24 38 i a path. Brennan 21 A 1.N.: 44491 1 PP 2 57] ABSTRACT 52] Cl "340/38 P 178/DIG 1 340/38 R An electronic detection circuit identifies several traffic paths Int. Myers Flled: June 1970 Attorney-Thomas W. Primary E-Yami'lerKathleen Assistant Examiner-Randall P. United States Patent Bolner Assignee: Thiokol Chemical Corporation, Bristol, Pa. G08G1/0133- Traffic data processing for classifying traffic situation.G08G1/0116- Measuring and analyzing of parameters relative to traffic conditions based on the source of data from roadside infrastructure, e.g.G08G1/0108- Measuring and analyzing of parameters relative to traffic conditions based on the source of data.G08G1/0104- Measuring and analyzing of parameters relative to traffic conditions.G08G1/04- Detecting movement of traffic to be counted or controlled using optical or ultrasonic detectors.G08G1/01- Detecting movement of traffic to be counted or controlled.G08G1/00- Traffic control systems for road vehicles.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Thiokol Corp filed Critical Thiokol Corp Application granted granted Critical Publication of US3663937A publication Critical patent/US3663937A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Original Assignee Thiokol Corp Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US44491A Inventor Thomas E Bolner Current Assignee (The listed assignees may be inaccurate. Google Patents Intersection ingress-egress automatic electronic traffic monitoring equipmentÄownload PDF Info Publication number US3663937A US3663937A US44491A US3663937DA US3663937A US 3663937 A US3663937 A US 3663937A US 44491 A US44491 A US 44491A US 3663937D A US3663937D A US 3663937DA US 3663937 A US3663937 A US 3663937A Authority US United States Prior art keywords intersection traffic vehicle path positions Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US3663937A - Intersection ingress-egress automatic electronic traffic monitoring equipment US3663937A - Intersection ingress-egress automatic electronic traffic monitoring equipment ![]()
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