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| Number | Title | Issue Date |
| 8054202 | Traffic preemption system and related methods A traffic preemption system and related methods. Implementations may include a vehicle preemption unit mounted to a vehicle including an optical transmitter adapted to identify to an intersection preemption unit coupled with an intersection system controller the pre... | 11/08/2011 |
| 7884738 | Emergency traffic light system A visual warning assembly for disposal at an intersection of a plurality of roadways is disclosed herein. The visual warning assembly includes a housing with first and second openings facing first and second directions. The first and second directions are transverse... | 02/08/2011 |
| 7868783 | Cellular-based preemption system A cellular-based preemption system that uses existing cellular infrastructure to transmit preemption related data to allow safe passage of emergency vehicles through one or more intersections. A cellular unit in an emergency vehicle is used to generate position repo... | 01/11/2011 |
| 7864071 | Emergency vehicle traffic signal preemption system An emergency vehicle traffic light preemption system for preemption of traffic lights at an intersection to allow safe passage of emergency vehicles. The system includes a real-time status monitor of an intersection which is relayed to a control module for transmiss... | 01/04/2011 |
| 7808401 | Light emitters for optical traffic control systems Various approaches for activating a traffic control preemption system. The traffic control preemption system has a receiver with a photodetector and circuitry that produces a number of electrical pulses in response to each detected light pulse. For each detected lig... | 10/05/2010 |
| 7573399 | Multimode traffic priority/preemption vehicle arrangement An arrangement for requesting preemption from a vehicle is used in a traffic control system. The arrangement for requesting preemption includes a protocol circuit, a signal control generation circuit, and an optical source. The protocol circuit is adapted to provide... | 08/11/2009 |
| 7432826 | Traffic preemption system with headway management A traffic-preemption system and method that communicates an identification code from vehicles to a traffic location. Traffic light control equipment, such as a receiver and traffic light circuit at each intersection of a controlled area, is used to manage headway in... | 10/07/2008 |
| 7417560 | Multimode traffic priority/preemption intersection arrangement A traffic light control system includes at least one parameter and a signal decoding circuit. The parameter or parameters are useful for assisting in differentiating between multiple communication modes. The signal decoding circuit has a front-end circuit and a back... | 08/26/2008 |
| 7397390 | Wireless traffic control system A wireless traffic control system and method for wirelessly communicating information using traffic control signs are provided. The method includes wirelessly transmitting at least one of traffic control information and vehicle information from a traffic control sig... | 07/08/2008 |
| 7375649 | Traffic routing based on segment travel time A system for identifying a fastest possible travel route is disclosed. A traveler data processor collects traffic speed data and associates the traffic speed data with road segments. The road segments collectively represent one or more possible travel routes from a ... | 05/20/2008 |
| 7363144 | Method and apparatus for predicting future travel times over a transportation network The present invention is a method and an apparatus for predicting future travel times over a transportation network. In one embodiment, a method for predicting future travel times over a transportation network includes receiving a data point indicating a real-time v... | 04/22/2008 |
| 7342509 | In-vehicle radio apparatus In an in-vehicle radio apparatus to radio-transmit information from a vehicle about to enter an intersection, the interference between a radio signal transmitted from the vehicle and a radio signal transmitted from another vehicle is suppressed. Further, an approach... | 03/11/2008 |
| 7333028 | Traffic preemption system communication method A remotely-controlled traffic-preemption system and method includes an encoder circuit, an optical source, an optical detector, and a decoder circuit. The encoder circuit is adapted to generate a set of signal pulses. At least one bit of a data word is encoded as a ... | 02/19/2008 |
| 7327280 | Emergency vehicle traffic signal preemption system An emergency vehicle traffic light preemption system for preemption of traffic lights at an intersection to allow safe passage of emergency vehicles. The system includes a real-time status monitor of an intersection which is relayed to a control module for transmiss... | 02/05/2008 |
| 7317406 | Infrastructure-based collision warning using artificial intelligence An improved apparatus for controlling a traffic signal at an intersection includes a signal controller having an artificial intelligence based situational analyzer. The signal controller receives vehicle data related to the speed and position of vehicles approaching... | 01/08/2008 |
| 7307547 | Traffic preemption system signal validation method A secure optical-communication traffic-preemption system and method is provided that securely communicates an identification code from an optical emitter to a traffic location. The optical emitter transmits light pulses that represent an encrypted code that is an en... | 12/11/2007 |
| 7270442 | System and method for monitoring status of a visual signal device System and method for monitoring status of a visual signal lamp. The system includes at least one optical fiber comprising a first end and a second end. The first end is positioned proximate to the signal lamp and is oriented to capture a portion of light signal emi... | 09/18/2007 |
| 7269502 | Mobile event triggering function for transit management system using traffic signal priority A traffic signal control method and system reduces the delay time of a transit vehicle at an intersection by incorporating an automatic vehicle location (AVL) system to trigger a traffic signal priority (TSP) strategy with a chain of mobile events to determine the c... | 09/11/2007 |
| 7248183 | Method and apparatus for secure traffic light interruption This invention relates to a method and apparatus for secure traffic light interruption. A purpose of this invention is to allow for the use of a secure system to allow the interruption of the traffic light signals by emergency (and other authorized) vehicles. An obj... | 07/24/2007 |
| 7221287 | Three-dimensional traffic report Disclosed herein is a traveler information monitoring and dissemination system. The system disclosed herein provides real time information to a traveler, wherein the real time information may be pre-selected by the traveler. The system ensures consistent and quality... | 05/22/2007 |
| 7215925 | Broadcasting real-time short range RF real-time information to motor vehicles moving along a highway via a sequence of short range RF broadcasting stations along the highway broadcasting to all vehicle transceivers within said range A simple region-specific broadcasting system for broadcasting information pertinent to motor vehicles in sequential regions of a roadway or highway directly to such vehicles when the vehicles are passing through such sequential regions. Existing cellular facilities ... | 05/08/2007 |
| 7196584 | Amplifier circuit An amplifier circuit 11 comprises an amplifier 12, an indicator of desired power 15, a power control circuit 14 and a power measuring circuit 13. The amplifier 12 amplifies an input signal to produce an output signal, and ha... | 03/27/2007 |
| 7174154 | System and method for providing information to an operator of a motor vehicle An information system and method provides information to an operator of a motor vehicle. A destination location and a current position of the motor vehicle are established. A planned route as a function of the destination location and the current position is establi... | 02/06/2007 |
| 7174153 | System and method for providing information to an operator of an emergency response vehicle An information system and method provides information to an operator of an emergency response vehicle. A destination location and a current position of the motor vehicle are established. A planned route as a function of the destination location and the current posit... | 02/06/2007 |
| 7167104 | System and method to wirelessly communicate information between traffic control signs and vehicles A system and method to wirelessly communicate information between traffic control signs and vehicles are provided. The method includes wirelessly communicating traffic control information from a traffic control sign to a vehicle and wirelessly communicating vehicle ... | 01/23/2007 |
| 7167106 | Methods and systems utilizing a programmable sign display located in proximity to a traffic light Methods and systems use a programmable sign display located in proximity to a traffic light to provide information to motorists upon the motorists directing their attention toward the traffic light. The programmable sign display may receive programming for content t... | 01/23/2007 |
| 7161497 | System for aggregating traveler information Disclosed herein is a traveler information monitoring and dissemination system. The system disclosed herein provides real time information to a traveler, wherein the real time information may be pre-selected by the traveler. The system ensures consistent and quality... | 01/09/2007 |
| 7126926 | Multi-tier wireless communications architecture, applications and methods Multi-tier system for digital radio communication. The multi-tier system has a first-tier base station with relatively long-range radio and has a second-tier base station with relatively short-range, low power and cheaper radios. The system can be more versatilely c... | 10/24/2006 |
| 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 |
| 7113108 | Emergency vehicle control system traffic loop preemption An emergency vehicle traffic signal preemption system using existing inductive traffic loops that is either “car-active” or “car-passive”. In the “car-active” system, a passive element having position information transmits an ID tag and the position info... | 09/26/2006 |
| 7098806 | Traffic preemption system A traffic preemption system is described that includes onboard equipment located on a vehicle and a fleet management center in communication with the onboard equipment. The fleet management center is also in communication with a traffic management center that is in ... | 08/29/2006 |
| 7043361 | Method and apparatus for calculating geometry of a moving haven Boundaries of a moving haven along a voyage plan are constructed with the utilization of simple shapes, rectangles and arcs, each of which are drawn with selected line segments. A buffer, internal to the moving haven boundary, is created, which, when crossed initiat... | 05/09/2006 |
| 7043209 | Electronic device and method of mounting radio antenna An electronic device comprises first and second antennas for a first radio communication scheme that uses a diversity scheme, and a third antenna for a second radio communication scheme arranged between the first and second antennas. ... | 05/09/2006 |
| 7027957 | Current interrupter assembly A method for determining the influence of one of a plurality of cathodic protection circuits along a pipeline includes switching one of a plurality of cathodic protection circuits off, while the remainder of the plurality of cathodic protection circuits are left on,... | 04/11/2006 |
| 7019669 | Trail safe alert system A pedestrian trail signaling device for warning users of the trail or path when an emergency vehicle is approaching the intersection. Emergency vehicles 14 have an actuatable transceiver that transmits a signal to the trail posted signaling device causing war... | 03/28/2006 |
| 6985090 | Method and arrangement for controlling a system of multiple traffic signals A method and arrangement for controlling a system of multiple traffic signals for regulating the traffic of vehicles is described. Traffic data is transmitted by wireless transmission to traffic data processing units assigned individually to a locally limited group ... | 01/10/2006 |
| 6980125 | Warning light system for alerting pedestrians and passenger vehicle operators of an approaching emergency vehicle A warning light system for a traffic intersection for alerting pedestrians and operators of passenger vehicles to the approach of an emergency vehicle. The warning light system is activated only by sounds in the range of frequencies which are emitted by the siren of... | 12/27/2005 |
| 6973384 | Automated location-intelligent traffic notification service systems and methods Traffic notification systems include a location determination system that is configured to determine a geographic location of a subscriber and an automated traffic notification system that is configured to automatically transmit a traffic notification message that i... | 12/06/2005 |
| 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 |
| 6950789 | Traffic violation detection at an intersection employing a virtual violation line A system and method for detecting and filtering non-violation events in a traffic light violation prediction and recording system, including at least one violation prediction image capturing device, such as a video camera, and a violation prediction unit. The predic... | 09/27/2005 |
