352 results about "Traffic speed" patented technology

A system and method for displaying traffic information in an automotive navigation system having a display, memory and a data receiver. The method includes the first step of storing in a traffic speed table in memory at least two speed threshold limits wherein each speed threshold limit represents a different traffic flow category. The receiver receives data representative of the vehicle speed on at least one road segment and compares that received vehicle speed data with the traffic speed table to determine the traffic flow category corresponding to the received speed data for the road segment. A visual indicator is then displayed on the display which corresponds to the traffic flow category for the road segment. The user is able to customize the speed threshold limits through a GUI. These speed threshold limits are further user modifiable as a function of weather, day of the week, road conditions, type of road, as well as other factors.

A method for developing traffic messages is disclosed. Data indicating traffic speed at a plurality of locations on a road network are obtained. Each of the locations is assigned a unique location reference code. The data indicating traffic speed for the location reference codes assigned to locations along a road of the road network are evaluated. Locations reference codes along the road having related traffic speeds are grouped into at least one congestion event along the road. The congestion events are transmitted as traffic messages.

A real-time vehicular traffic flow display system employs groups of monitor stations positioned at spaced-apart locations along vehicular roadways, to sense the speed of traffic flow on a given portion of a route. Individual section stations each serve a sequential group of different monitor stations. Each monitor station senses the speed of vehicular traffic a given road portion and transmits corresponding information to an associated section station; each section station processes the received signals, and transmits them to display stations on board vehicles in addition to sending the signals to an optional geographic area central station. The signals transmitted to vehicles present information concerning traffic speed for each monitored portion of a road in addition to identifying the road portion; traffic speed information is processed to identify predetermined ranges of average speed in selected colors. Each vehicle station includes a Global Positioning System (GPS) receiver and visual display device with access to both the GPS including a database of local area road maps for display. All portions of each monitored route on a displayed map are shown in a color corresponding to the average speed of traffic monitored on the corresponding route portion. The current position of the vehicle station is shown on the map, and a “preferred” route from that location to an optionally selected destination is highlighted; both functions are accomplished in accordance with known GPS technology. An optional geographic area central station stores information not usually available in the on-board vehicle station, such as wide-area maps, and also receives traffic condition signals from various section stations including those beyond the range of the vehicle station. The central station correlates these two sources of information and makes the combined results available for separate access by users of the system.

A roaming sensor system collects data on the condition of roads and bridge decks and identifies and maps defects, including cracks, potholes, debonding, tracking, delamination, surface ice, surface water, and rebar corrosion. Data are collected by a vehicle or a fleet of vehicles driven at normal traffic speeds. The vehicle is outfitted with sensors that collect data using acoustic surface waves, ground penetrating radar, mm wave surface radar, and / or video images. The data are transmitted to a control center for analysis and distribution.

The invention discloses an automobile intelligent speed limiting system and an automobile speed limiting method, and relates to the technical field of automobile safety driving assistance. The automobile intelligent speed limiting system and the automobile speed limiting method can improve accuracy of speed limiting identification recognition and improve driving safety of a driver. The automobile intelligent speed limiting system comprises a camera, an intelligent navigation device, an automobile body sensor and a controller, wherein the camera can recognize road traffic identification boards and extract road traffic identification information through the image processing technology, the intelligent navigation device can provide current road information, navigation route information and national or regional traffic road speed limiting law related information in real time, the automobile body sensor can provide automobile body information in real time, a traffic speed limiting identification database is set up in the controller, the input end of the controller is connected with the camera, the intelligent navigation device and the automobile body sensor, and the output end of the controller is connected with an automobile instrument and an engine ECU. The automobile intelligent speed limiting system is used for assisting in limiting the speed of the automobile.

Using data from a wireless telephony network to support transportation planning and engineering. Data related to wireless network users is extracted from the wireless network to determine the location of a mobile station. Additional location records for the mobile station can be used to characterize the movement of the mobile station: its speed, its route, its point of origin and destination, and its primary and secondary transportation analysis zones. Aggregating data associated with multiple mobile stations allows characterizing and predicting traffic parameters, including traffic speeds and volumes along routes.

A method and apparatus for a navigation system evaluates an overall cost of each candidate route by incorporating traffic information such as traffic incident types and traffic flow speeds. An optimum route to the destination is determined by comparing the costs of two or more candidate routes and selecting a candidate route of the least cost. The method and apparatus determines relevancy and accuracy of the traffic information and adjusting the cost of the candidate route. When the traffic information on the candidate route shows a conflicting situation, the method and apparatus modifies the cost derived from the traffic information. When modifying the cost, the traffic speed information is prioritized over other type of traffic information.

The invention discloses a vehicle speed control device and method. The vehicle speed control device comprises an environment sensing and integration module, a pedestrian jaywalking behavior cognition module and an automatic driving decision-making module, wherein the environment sensing and integration module is used for detecting the information of a jaywalking pedestrian in front of a running vehicle and outputting the information of the jaywalking pedestrian; the pedestrian jaywalking behavior cognition module is used for receiving the information of the jaywalking pedestrian and outputting the pedestrian's behavior cognition information according to the received information of the jaywalking pedestrian combined with the dynamic time series information and the interaction between the vehicle and the pedestrian; and the automatic driving decision-making module is used for receiving environment information and pedestrian's behavior cognition parameters, giving the current traffic speed of the vehicle, and outputting the current traffic speed of the vehicle. According to the vehicle speed control device and method disclosed by the invention, in the running process of the vehicle, the pedestrian target in front of the vehicle can be accurately recognized, the pedestrian's intention can be predicted, real-time judgment is performed, reasonable decision can be made, and autonomous recognition and decision-making of an autonomous vehicle can be realized when a pedestrian crosses the road, so that the vehicle can safely and smoothly give way to the pedestrian crossing the road.

An intrusion detection and prevention system and method for dealing with threats to computers and computer networks, and in particular to computers and networks connected to the Internet, is disclosed. A sensor receives network traffic. The sensor includes a first processor for managing the network traffic that is received, a first path for the traffic that is received for storing the traffic in a memory for subsequent use, a second path for analyzing the traffic that is received, and for processing the traffic at a speed that is at least as fast as speed of the first path. The second processor is associated with the second path so that some of the traffic is allowed along the first path and other of the traffic is rate limited or not allowed along the first path. The system and method use four tiers of threat detection to successively mitigate a large variety of threats.

The traffic speed counting and matching method for road traffic includes: fetching position information of mobile terminals from collected traffic data information; when the position information of the mobile terminals is lost, according to the change information of the position information of the mobile terminals, dynamic predicting and obtaining the position and speed information of the mobile terminals by using follow-up arithmetic; matching the position and speed information of the mobile terminals onto a road network to generate road traffic speed information. The road traffic speed counting and matching system is also disclosed. The method and system can provide exact traffic condition information to traffic managers and going out people.

The invention relates to a non-contact track traffic speed-measurement and positioning method based on sleeper detection and a device thereof. Sensor are installed at the bottoms of train bodies, sleepers laid on tracks in parallel are used as detected objects, the sensors are triggered to generate electric pulses when trains pass through the detected objects, and then the speed measurement and the relative positioning of the trains are accomplished according to the sequence of the triggered sensors and the time each sensor causes the rising edges and the falling edges of the electric pulses. The device comprises more than two sensors installed at the bottom of the train bodies, and measurement control units. The non-contact track traffic speed-measurement and positioning method and the device thereof have the advantages of simple and compact structure, low cost, convenient maintenance, high reliability and wide range of application.

The invention discloses a real-time predicting cruise control system based on economical driving. The real-time predicting cruise control system based on economical driving comprises an information collection module, a vehicle dynamics model establishing module and a receding horizon optimal calculation module, wherein the information collection module is used for collecting the driving state information, comprising speed information, the distance between a local vehicle and a front vehicle and the road traffic speed limiting information within the predicted distance, of the local vehicle and the front vehicle; the collected information is transmitted to the vehicle dynamics model establishing module; the vehicle dynamics model establishing module is used for establishing a vehicle dynamics model according to the collected traffic speed limiting information and the driving state information of the front vehicle and the local vehicle, establishing the control problem and determining the optimal objectives and satisfied constraint conditions; and the receding horizon optimal calculation module is used for obtaining the optimal gear sequence and an explicit solution of the optimal engine torque and braking force by optimizing through a method combing a Pontryagin minimum principle with a method of bisection on the basis of the control problem and the constraint conditions proposed by the vehicle dynamics model establishing module, and determining the optimal control rule.

A system, method and computer program product for forecasting a vehicle traffic condition in a near future. The system comprises a traffic prediction tool, a turning percentage prediction module and a simulation tool. The traffic prediction tool estimates a traffic speed and volume in a traffic link. A traffic link refers to a portion of a traffic road where the traffic prediction tool is installed. The turning percentage prediction module estimates a turning percentage in the traffic link based on the estimated traffic speed and traffic volume. The simulation tool computes, based on the estimated turning percentage, the estimated traffic speed and the estimated traffic volume, an expected traffic volume in the traffic link.

An apparatus for measuring distance to a surface is disclosed. The apparatus transmits at least one subsequent pulse of light prior to receiving a reflection of a previously sent pulse of light. Thus, multiple pulses of light are in-flight at a given time. The embodiments are applicable to terrain mapping, bathymetry, seismology, detecting faults, biomass measurement, wind speed measurement, temperature calculation, traffic speed measurement, military target identification, surface to air rangefinding, high definition survey, close range photogrammetry, atmospheric composition, meteorology, distance measurement, as well as many other applications. Examples of such apparatuses include laser ranging systems, such as light detection and ranging (LIDAR) systems, and laser scanners. Data received from the apparatus by a data processing unit can be used to create a data model, such as a point cloud, digital surface model or digital terrain model describing the surface, terrain, and / or objects.

A traffic speed control and surveillance system includes a speed sensor, vehicle identifier and transmitter / receiver disposed in a motor vehicle. The system also includes a plurality of mini remote terminal units disposed along a highway for monitoring signals from passing motor vehicles. Those signals identify the vehicle and speeds of those vehicles. The system also includes a communication center and one or more master remote terminal units for linking the mini remote terminal units to the communication center which processes the information. The communication center may also transmit a signal to disable the engine of an offending vehicle.

The invention discloses a phased-array antenna applied to an ETC (Electronic Toll Collection) system. The phased-array antenna applied to the ETC system comprises a transmitting antenna array, a receiving antenna array, a phased-array transmitting assembly, a phased-array receiving assembly, a waveform control interface, a communication control module, a ground sensing interface, a vehicle speed computing module, a vehicle tracking module, a power supply communication adaptor and a safety certificate module, wherein the transmitting antenna array is composed of antenna subarrays; the receiving antenna array is composed of antenna subarrays; and the communication control module is used for collecting a ground sensing coil signal, estimating the position and speed of a vehicle in real time, working out a waveform control command, and respectively controlling phase positions and amplitudes of each path of radio-frequency signals of the phased-array transmitting assembly and the phased-array receiving assembly so as to form a radio-frequency beam for tracking the vehicle in space. The invention also discloses an application method. According to the invention, dynamic and long-distance continued communication is realized, vehicle-following interference is eliminated, the transaction success rate is improved, the traffic speed is improved, the use efficiency of the ETC system and cost performance for construction are improved, and the construction cost is reduced.

The invention provides a laser dynamic deflection survey vehicle. The survey vehicle comprises a mobile measuring table, a measuring cross beam, a running wheel, a velocity measuring wheel, an accelerometer and a data acquiring and processing device. The laser dynamic deflection survey vehicle provided by the invention has the following advantages: according to the laser Doppler velocity measurement principle and the inertia measurement principle, during the driving process of the vehicle at a normal traffic velocity (15-80km / h), a plurality of laser Doppler vibration meters arranged in the front of loading wheels of the vehicle synchronously measure the relative movement velocity of various measuring points on a road surface; the instantaneous deflection deformation velocity of the road surface is obtained through inertia compensation calculation; and a dynamic deflection value of the road surface is obtained through inversion by utilizing a road layered elastic mechanical model and used for general investigation and assessment of the bearing capacity of a road network.

The present invention relates to a system and a method of predicting traffic speed based on the speeds of neighboring links. A system for predicting traffic speed on a link basis, on a map based on a past traffic patterns, includes a prediction model establishment unit that establishes a neighboring link speed-based prediction model including the correlation between the speed of each link and the speeds of neighboring links based on real-time traffic information accumulated in a real-time traffic information database for a predetermined time, a prediction model database that stores the established neighboring link speed-based prediction model data, and a traffic speed prediction unit that inputs real-time neighboring link speed information for a specific object link to the neighboring link speed-based prediction model and predicts an output value according to the real-time neighboring link speed information as the traffic speed of the object link.

The invention discloses a method for guiding vehicles at a road intersection. The method is characterized in that: at least a row of guiding lamps are arranged on the ground of each lane leading to the road intersection; the guiding lamps have two colors of green and red; the length of the lanes provided with the guiding lamps is at least 200 meters from the intersection; traffic speed at the intersection is set; length of road occupied by the red and green guiding lamps is determined by the lasting time of the red and greed traffic lights and the traffic speed at the intersection; color sections of guiding lamps are controlled to perform movable display towards the intersection at the traffic speed at the intersection by changing displaying colors of guiding lamps at corresponding positions, so that the colors of the guiding lamps at the intersection are matched with the colors of the traffic lights. The method automatically divides vehicles into groups; each group of vehicles arrives at the intersection just when the traffic light is green; therefore, vehicles run through the intersection without waiting; and the method improves traffic capability of vehicles within the same green light period, reduces exhaust emission and saves gasoline.

The invention provides a double-communication region electronic nonstop fees- charging roadway system, comprising master control machine, antenna, auto railing, trigger ground sensor, snapping ground sensor, railing drop ground sensor, and fees number display, where the antenna comprises two groups of wireless communication devices with different emitting angles, interconnected through logic processing circuit, and is installed on a gantry and above the roadway, where the far and near communication areas covered by the two groups of wireless communication devices are overlapped. A double-communication region electronic nonstop fees-charging roadway method switches between communication areas according to the position of the vehicle and the trade state under the control of a roadway system, so as to let the normally trading vehicles pass or hold up the illegal vehicles. The invention can solve the vehicle following interference problem and assure the vehicle traffic speed; eliminate the communication blind areas in front of the auto railing to strengthen the ability to process abnormal conditions; reduce the vehicle following interference caused by vehicle backing and stop escaping feesú”prevent viciously jumping the queue from the side road; and assure the vehicles that have traded normally pass.

A system, method and computer program product for managing the quality of service differentiated cloud storage. The cloud storage (and its services) is highly distributed. An overall speed of the storage is calculated based on storage speed and a traffic speed of the connection to the particular cloud storage. Data access expenses are calculated. Then, for each of the portions of the cloud storage the associated speed and traffic costs are calculated, so the user can select a level of data access guarantee (DAG) for his particular needs. In order to maintain the desired overall speed of the data access, geo-targeting with the cloud storage system is implemented, where the same data is retrieved from different locations based on optimal data movement costs.

The invention discloses an urban road network short-term traffic operation state estimation and prediction method, and the method comprises the following steps: (1) acquiring heterogeneous data, preprocessing the heterogeneous data, and reconstructing a speed field of a research unit by using a GASM algorithm by taking a road section between two signalized intersections of a city as the research unit; (2) constructing an urban road network spatial weight matrix, calculating spatial-temporal correlation between road sections, and identifying and quantifying fragile road sections by adopting TOPSIS; (3) taking an average value of the speed according to the reconstructed research unit speed field and selecting a reasonable fragile road section to construct a space-time characteristic matrix of the urban road network; (4) estimating and predicting the traffic state of the whole road network according to the Bi-ConvLSTM. According to the method, the heterogeneous data is fused to reconstruct the speed field of the research unit, and the prediction limitation caused by a single data source is solved; meanwhile, Bi-ConvLSTM is adopted to consider the traffic speed influence of the upstream and the downstream of the research unit, the space-time characteristics of the traffic flow are fully mined, and the prediction accuracy is further improved.

The invention relates to a vehicle speed limit system, comprising a traffic speed limit indicator and a vehicle automatic over-speed governor, wherein the traffic speed limit indicator is used to transmit speed limit information and the vehicle automatic over-speed governor is used to limit the speed of vehicles. The invention also relates to a vehicle speed limit system, comprising a central processor and a vehicle automatic over-speed governor, wherein the central processor is used to deliver speed limit information, and the vehicle automatic over-speed governor which is connected with the central processor and is loaded on vehicles is used to limit the speed of vehicles. The invention further relates to a vehicle speed limit method, an information conversion module of the traffic speed limit indicator converses the speed limit information into short distance wireless signal sent by a short distance wireless signal transmitting module, the wireless signal processing module of the vehicle automatic over-speed governor receives the short distance wireless signal and analyzes the short distance wireless signal as speed limit information, and the speed limit information is prompted by a prompting module. The invention also relates to a vehicle speed limit method, a positioning module is used to measure vehicle position information, transmits the information to a central processor, and transfers the speed limit information in database, and the speed limit information is prompted by the prompting module, thereby realizing automatic speed limit control of vehicles.

Estimation of traffic speed includes applying data processing functions to determine missing speed information by smoothing spatial and temporal GPS data to achieve an accurate estimation of link speed over all links of a transportation network at all time periods. This estimation of traffic speed uses one link's observed speed information to estimate neighboring links without observed speed information and therefore provides a system and method of processing collected GPS data to obtain a thorough understanding of traffic flow conditions for all represented links without further collection of GPS data. The present invention also provides a framework for analyzing and improving real-time collection of GPS speed data.