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| Number | Title | Issue Date |
| 7274306 | Traffic management device and system A smart traffic control device transmits information to approaching vehicles regarding its current and future state enabling vehicles to control their speed to avoid arriving at the traffic control device until it permits the passage of traffic, thus avoiding stoppi... | 09/25/2007 |
| 7236102 | Vehicle information system for a loop intersection A driver of a vehicle that is going to enter a loop intersection is allowed to perceive vehicles traveling on a loop road and vehicles that are going to enter the loop intersection from separate roads. Infrared ray sensors for detecting vehicles in the loop intersec... | 06/26/2007 |
| 7221289 | System and method for operating a loop detector The temperature of an operator circuit is measured. A relationship between the temperature of the operator circuit and characteristics of the operator circuit is determined. The relationship is applied to the measured temperature of the operator circuit to create an... | 05/22/2007 |
| 7116248 | Vehicle detector system with synchronized operation A vehicle detector system having a number of individual vehicle detectors each capable of sampling a plurality of vehicle loops in mutual synchronization. One detector operates as a master detector for synchronization purposes; the other detectors are operated as sl... | 10/03/2006 |
| 7116245 | Method and system for beacon/heading emergency vehicle intersection preemption An emergency vehicle intersection preemption beacon/heading system and method that relies on the use of highly localized, low-power communication system. The system can be implemented in a “car-active” mode or a “car-passive” mode. In the “car-active” mo... | 10/03/2006 |
| 7092815 | Traffic control systems for vehicle spacing to dissipate traffic gridlock The present invention is designed to complement the existing transportation infrastructure in order to alleviate ever-worsening traffic congestion in problematic areas by minimizing the impact of driver “bunching” habits and/or external events that lead to conge... | 08/15/2006 |
| 7027653 | Variation detecting apparatus, variation detecting method, and storage medium and system for storing program involved in the method In the case where variations in ground objects in one and the same area are detected between a line drawing map describing profile lines of the ground objects or a reference line drawing/image obtained by picking up the ground objects from above, and a target image ... | 04/11/2006 |
| 6967592 | Wireless highway guide A method and system for providing travel guidance for transportation vehicles traveling on a highway system that comprises highway transceivers (HTs) with limited range placed at selected intervals along the highway. Each transportation vehicle has an automobile tra... | 11/22/2005 |
| 6937161 | Traffic signal control method In traffic signal control for setting a green light time to a value between the lower limit time and the upper limit time in real time depending on a traffic volume sensed by vehicle sensors Sa, Sb, and so forth, the upper limit time Gmax is set longer wi... | 08/30/2005 |
| 6922156 | Vehicle trip determination system and method A method for determining a vehicle trip on a roadway includes providing a plurality of vehicle detections from a plurality of gateways, determining a maximum travel time between corresponding pairs of the plurality of gateways, correlating corresponding pairs of the... | 07/26/2005 |
| 6870489 | Vehicle sensing system A reusable mechanical fastening means for a vehicle monitoring system facilitates maintenance and repair of the system. A plurality of carrier sections are connected together by clips. The clips have release tabs to move prongs against a spring force, thereby making... | 03/22/2005 |
| 6813370 | Lane marker recognizing apparatus A lane recognition apparatus for recognizing lane markers on a road surface based on a pair of stereo images of a scene in front of an own vehicle obtained from a stereoscopic camera, includes a stereo image processing means for calculating distance information of a... | 11/02/2004 |
| 6483443 | Loop sensing apparatus for traffic detection Loop sensing apparatus for detecting vehicles traveling along a lane of a roadway comprises an outer loop producing a region of magnetic field with the same polarity and an inner loop sized to fit within this region of constant polarity. The inner loop pr... | 11/19/2002 |
| 6337640 | Inductive loop sensor for traffic detection, and traffic monitoring apparatus and method using such a loop sensor An inductive loop sensor for detecting vehicles travelling along a lane of a roadway comprises a figure-of-eight conducting loop. The loop is arranged with its three segments transversely across the roadway to detect the wheels of vehicles travelling alon... | 01/08/2002 |
| 6320515 | Method and equipment for motorway control The method and the means concern a system for control of motorway traffic, with focus on access control. The network characteristics of the traffic, according to the invention, is treated by traffic control functions based on the traffic as well as the ac... | 11/20/2001 |
| 6198410 | Illuminatable traffic sign An illuminatable traffic sign including a traffic sign secured to a support post. The traffic sign has indicia disposed thereon. The traffic sign has an outer periphery. A plurality of lights are positioned on the traffic sign along the outer periphery an... | 03/06/2001 |
| 6049295 | Method and system for avoiding a collision at an intersection and a recording medium storing programs performing such a method Vehicles are prevented from colliding with each other at an intersection provided with no traffic light or having an obstructed view. A road-side apparatus is provided in the intersection and a on-board apparatus is provided on a vehicle. The on-board app... | 04/11/2000 |
| 6008741 | Intersection information supply apparatus An intersection information supply apparatus includes a table indicating relationships between approaching directions of a vehicle to an intersection and signal forms, an approaching direction detecting unit detecting an approaching direction in which the... | 12/28/1999 |
| 6005491 | Motion detecting traffic light A motion detecting traffic light system is provided for use at a blind corner adjacent to which a first roadway and a second roadway intersect. Included is a motion sensor positioned on the first roadway and adapted to transmit an activation signal upon t... | 12/21/1999 |
| 5861820 | Method for the automatic monitoring of traffic including the analysis of back-up dynamics In a method for automatically monitoring traffic, traffic data are recorded at several measuring points of the traffic network. The time-dependent positions of the upstream back-up flank and of the downstream back-up flank are estimated continuously accor... | 01/19/1999 |
| 5821878 | Coordinated two-dimensional progression traffic signal system A method of controlling traffic signals on existing grid-like systems of avenues and crossing streets. Two phase traffic signals, red and green, wherein both phases are equal in duration and the amber interval is a part of the green interval. The coordina... | 10/13/1998 |
| 5696502 | Method of sensing traffic and detecting traffic situations on roads, preferably freeways A method of sensing traffic and detecting traffic situations on roads (AS), preferably freeways. With measuring points (measuring cross sections MQ1, MQ2, . . . ) set up for the purpose for vehicle detection using traffic sensors (VS) and with a traffic d... | 12/09/1997 |
| 5448219 | Indicating apparatus from preventing vehicles from colliding with each other as they pass An indicating apparatus for preventing vehicles from colliding with each other as they pass an intersection of roads includes a vehicle sensing device placed on one of the roads a predetermined distance from the intersection for sensing a vehicle approach... | 09/05/1995 |
