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| Number | Title | Issue Date |
| 7417561 | Acoustic or pneumatic pulse transfer system for event counting An event sensing component includes a housing, wherein the housing includes a first tube that is provided along an entire length of the housing, and a second tube that is provided along the entire length of the housing. The housing also includes a first connector pr... | 08/26/2008 |
| 7271721 | Protected distribution system An information transmission system comprising a conductor operable to carry a desired information signal. A first tube substantially surrounds the conductor and a second tube substantially surrounds the first tube to define a substantially fluid-tight chamber thereb... | 09/18/2007 |
| 7230546 | Roadway incursion alert system An apparatus and method for generating incursion alerts in response to incursion events detected by incursion detector units, attached to safety icons such as traffic cones and signage. The incursion detector units are activated by automatic activation sensors and r... | 06/12/2007 |
| 7219031 | Rumble strip responsive systems: discrimination of types of rumble strips There are basically two types of rumble strips: shoulder/center rumble strips and in-lane rumble strips. In an embodiment of the invention, there is a device that automatically identifies the type of rumble strip with which a vehicle tire is in contact with. The dev... | 05/15/2007 |
| 7187302 | Assessing the accuracy of road-side systems A method of assessing the accuracy of a roadside traffic monitoring system (TMS) arranged to measure the speed and/or other parameters of vehicles passing a predetermined measurement point adjacent the TMS is disclosed. The method includes measuring the speed of eac... | 03/06/2007 |
| 7102539 | Rumble strip responsive systems An embodiment of the present invention includes a device to alter transfer characteristics of a road departure warning installation installed on a road to a driver of a vehicle, including a rumble strip sensor to sense input from a rumble strip and an adjustable veh... | 09/05/2006 |
| 7030777 | Roadway incursion alert system A system and method for generating remote incursion alerts in response to incursion detected by incursion transmitter units, such as at traffic cones, posts, barricades and signage. Alerts are generated in response to impacts detected at the safety icons within an i... | 04/18/2006 |
| 7022925 | Acoustic pulse transfer system for event counting An acoustic pulse transfer device according to the invention has one or more carrier segments that can be connected together to transport acoustic pulses through them. Acoustic pulses generated by events in a first segment are transported through a second segment, w... | 04/04/2006 |
| 6917308 | Surface-mount traffic sensors Surface-mounted traffic monitoring sensors that do not require substantial disruption to traffic flow to install or maintain, and that do not substantially degrade the physical integrity of the road. Pneumatic road-tube wedges and surface-mount inductive blades dete... | 07/12/2005 |
| 6903653 | Process and system for determining the onset of tread rubber separations of a pneumatic tire on a vehicle System and method of detecting an onset of tread rubber separation of a pneumatic tire on a vehicle, in which a permanent first periodic vibration is produced, in at least one of each axle and each wheel, that is proportional to a wheel rotational speed as a speed o... | 06/07/2005 |
| 6871992 | Brake light system A brake light system for a vehicle includes an indicating member movable between a first position and a second position, which is different from the first position. The indicating member is movable from its first position to its second position in response to the ac... | 03/29/2005 |
| 6763288 | Method and system for monitoring and/or controlling behavior of a vehicle by measuring deformations of its tires A method for monitoring and/or controlling the behavior of a vehicle including at least one wheel includes determining one or more values of deformation of a tire of the at least one wheel by measuring the one or more values using a first signal emitted between a ri... | 07/13/2004 |
| 6393362 | Dynamic safety envelope for autonomous-vehicle collision avoidance system The function of each autonomous vehicle in a surface mine is performed according to a predetermined trajectory related to its particular task and implemented by a guidance system through on-board GPS and two-way communication hardware. The current positio... | 05/21/2002 |
| 6301544 | Traffic monitoring system A traffic management systems, combining different monitoring capabilities, beginning with standard WIM (Weigh in Motion) systems for axle weight measurements, combined with tire pressure monitoring in motion and suspension monitoring in motion, whereby fo... | 10/09/2001 |
| 6300883 | Traffic recording system A traffic recording system for recording vehicular traffic events on a roadway having one or more lanes of traffic has a power control unit and a timer counter. Multilane roadway sensors sense roadway traffic and generates analog signals for vehicles trav... | 10/09/2001 |
| 6288651 | Portable roadway perimeter alarm The portable roadway perimeter alarm has an impact sensor which may be a shock or pressure sensor that is connected to a transmitter. The impact sensor and transmitter unit is located around the perimeter of a roadway work area to detect vehicles penetrat... | 09/11/2001 |
| 6208268 | Vehicle presence, speed and length detecting system and roadway installed detector therefor An improved detector is provided for installation in a roadway surface. The detector finds utility in a highway vehicle detection system for determining vehicle presence, vehicle speed and vehicle length. First and second matched induction coil magnetic s... | 03/27/2001 |
| 5841368 | Device for positioning a vehicle in relation to the walls of a garage, and/or in relation to an adjacent vehicle The invention is directed toward a parking assist device which is removably affixed in relation to a surface and is adapted to engage the on coming wheels of a vehicle and provide upon being engaged by the wheels of a vehicle a signal to the operator to s... | 11/24/1998 |
| 5710558 | Traffic sensor for roadway placement A traffic sensor for dispostion across a lane or lanes of a roadway includes a pliable strip within which is housed a flexible carrier which in turn supports electrical sensors and coaxial cables. The components are in circuit with a roadside located reco... | 01/20/1998 |
| 5661474 | Highway work zone intrusion alarm system A work zone intrusion alarm system which sounds a siren to warn highway workers in the event a vehicle enters a work zone. Workers may thus react to errant vehicles in time to avoid injury. The work zone intrusion alarm system is composed of a series of p... | 08/26/1997 |
| 5646615 | Treadle and roadway treadle assembly An optical treadle of extended longevity is disclosed. The treadle is of unitary construction with an improved cross-sectional passageway shape that more effectively interrupts light when a vehicle tire passes thereover. A treadle assembly with permanentl... | 07/08/1997 |
| 5548275 | Alarm system for enclosing and protecting an area A protective alarm system for encompassing an area to be protected, such as a swimming pool, includes an enclosure arrangement having at least one and preferably a plurality of flexible hoses that are filled with fluid and substantially enclose or surroun... | 08/20/1996 |
| 5486820 | Traffic sensor having piezoelectric sensors which distinguish lanes A traffic sensor including piezoelectric sensors having different polarities in different lanes of the roadway so that traffic data for different lanes of a roadway may be discriminated from the polarity of the received signal(s). Preferably, the piezoele... | 01/23/1996 |
| 5457449 | Method and apparatus for monitoring highway traffic A portable traffic warning device identifies hazardous traffic conditions at highway construction sites. The device includes an air hose that actuates a monitor switch whenever a vehicle travels over the air hose. A siren is operably coupled to the monito... | 10/10/1995 |
| 5389921 | Parking lot apparatus and method A parking lot traffic control and fee collection system is disclosed for use in stadium type parking lots. A vehicle counter installed in a portable traffic pylon is provided at the entry point for each entrance lane of the parking lot for marking the sta... | 02/14/1995 |
| 4963705 | Treadle assembly The treadle assembly of the present invention comprises one or more lightweight flexible circuits completely sealed within an envelope of resilient elastomeric material. This treadle is thus more resistant to water, wear, road salt, and other environmenta... | 10/16/1990 |
| 4901334 | Traffic counter apparatus for selective lane use A housing assembly of the apparatus includes a roadway mounted base plate to which a housing is secured with the housing having a low profile and inclined side and end walls to permit placement of the housing assembly along a course of lane markers. The h... | 02/13/1990 |
| 4862163 | Traffic monitoring system An improved traffic monitoring system is disclosed in which a microprocessor is connected to an analog to digital converter providing a series of digital samples of the pressure within a road tube for analysis of the signals. If a pulse is detected exceed... | 08/29/1989 |
| 4787243 | Device for detecting a dimension, in particular a tread width on a path The device comprises: an elongate support part (4) suitable for being embedded in the path and having a low upstanding wall (17) running along the edge thereof; a plate (30) cantilevered out from the low wall (17) with its cantilevered portion being subdi... | 11/29/1988 |
| 4603241 | Elastic strip with contacts for detecting the transit of motor vehicles with a protection against wear An elastic strip with inside electrical contacts and trapezoidal geometry for the detection of the transit of vehicles includes a deformable body made of an elastomeric material with a central cavity for metal contact elements. About the central cavity ar... | 07/29/1986 |
| 4374299 | Triboelectric transducer cable Two embodiments of a triboelectric transducer cable for generating a signal in response to movement or deformation of the cable each include multiple insulated central conductors, a semi-conductive wrapping separately surrounding each of the insulated cen... | 02/15/1983 |
| 4151595 | System for controlling ground movements on airfields The system enables aircraft movements on runways and taxiways to be guided and a corresponding ground traffic to be controlled. It comprises sensors for detecting pressure variations and which are distributed at known intervals along the routes, each sens... | 04/24/1979 |
| 4047166 | Electrostatically charged cable transducer The sensitivity of a buried electrostatically charged cable transducer, such as an electret cable, to mechanical disturbances caused by men, vehicles and the like moving on the surface of the ground is greatly improved by disposing the cable loosely in a ... | 09/06/1977 |
| 3950725 | Automobile detecting and announcing device Apparatus for detection of the presence of an automobile and its direction of movement into and out of a specific area and activating a reproducing system to provide audible and/or visual information to the driver and then resetting the system upon comple... | 04/13/1976 |
| 3949355 | Sensor for vehicular traffic data accumulating systems A pneumatic road tube, a pressure responsive transducer, and an electronic circuit provide a vehicle sensor mechanism for use in a traffic data accumulating system. A complex air wave is produced within the tube each time a vehicle axle runs over the tube... | 04/06/1976 |
