33results about How to "Accurate traffic information" patented technology

An embodiment provides a traffic information generating method for generating traffic information about a road on which a vehicle travels. A vehicle speed is detected by a vehicle speed sensor at predetermined distance or time intervals. By referring to a prescribed speed, a prescribed distance, and a link determination distance, a congestion degree associated with the vehicle speed is detected.

The invention discloses a method for detecting traffic conflict between a motor-assisted bicycle and an automobile based on an ST-MRF model. The method includes the steps of a traffic camera taking three-dimensional video images, tracking single motor-assisted bicycle and automobile by using the ST-MRF model to obtain the traffic information of the single motor-assisted bicycle and automobile, converting the three-dimensional video images taken by the traffic camera into two-dimensional coordinate data through a coordinate conversion algorithm, predicting the parking points of the motor-assisted bicycle and the automobile in the next frame image, and establishing driver conflict determination criteria according to the distance between the parking points. A method for determining traffic between a red-light running motor-assisted bicycle and a normally driving automobile by tracking moving tracks of vehicles, and real-time and accurate traffic information for accident identification can be provided to a traffic management department.

The invention discloses a bus GPS track data road network matching method which includes 1 collecting all GPS track data of a bus in a period; 2 determining at least one candidate matching road section for one track point to form a candidate matching road section set in the bus road network data structure; 3 judging the candidate matching road section set of surplus track points of the first track point one by one and determining at least one matching point for each track point; 4 connecting matching points of all the track points to form multiple candidate running tracks and judging the candidate running track with the most matching points as the running track; 5 determining that each road section is matched with k track points due to the fact that the running track passes through a plurality of road sections. By means of the matching method, the GPS track points are classified into the bus road network data structure as real as possible to accurately judge the actual running position of one bus at certain time to accurately obtain the road condition information.

The embodiment of the invention discloses a vehicle infrastructure integration-based traffic guidance method, equipment and system and a storage medium. The method comprises the steps of firstly, acquiring vehicle information on a lane changing region in real time by intelligent terminal sensing of road-side equipment or vehicle road communication sensing, wherein the vehicle information comprisespositions, speeds and directions of at least two vehicles; secondly, determining a lane changing induction scheme with shortest forecast passing time of each target vehicle according to the vehicle information, wherein the lane changing induction scheme is hypothesized in a way that a corresponding target vehicle changes a lane from a road segment within a designated range, wherein the target vehicle is at least one of the two vehicles; and finally, prompting the target vehicle to change the lane from the road segment within a recommended and designated range from the corresponding lane changing induction scheme. If the scheme is employed, the lane changing can be completed with relatively short time, traffic congestion is released, the situation that the congestion is increased due to concentrated lane changing at an inappropriate road segment, and the integral traffic condition of a larger region range is further improved.

The invention relates to a method for estimating the number of vehicles at a road segment based on a travel time distribution rule. The method comprises the steps: (1), pre-building of a travel time distribution model of different turning directions and time periods: extracting the travel time samples of a road segment m at the same date in one historical cycle for classification to obtain a travel time sample set, and building the travel time distribution model of different turning directions and time periods; (2), the real-time estimation of the number of online vehicles at the road segment:collecting the data of identity detection equipment at a downstream intersection of the same road segment m in real time; calculating the moment when a vehicle enters the road segment based on the travel time, which is detected by the estimation of the above model and is employed by the vehicle for passing through the road segment m, through the moment when the vehicle leaves the road segment m and the estimated travel time; judging whether the vehicle is located on the road segment m at the moment t or not: adding one to the number of vehicles if the vehicle is located on the road segment mat the moment t, or else performing no recording, and finally obtaining the number of vehicles on the road segment m at the moment t through accumulation. The method is good in implementation performance, is high in efficiency, is low in cost, and can be widely used for the estimation of the number of vehicles at road segment.

The invention discloses a method for generating road condition information based on bus GPS trajectory data, comprising: step 1, in the bus road network data structure, the actual bus stops, station points, line intersections and intersection nodes are all represented by nodes, Two adjacent nodes in the same direction on a road are connected by a line segment. The line segment is defined as a road segment, which is used to represent an actual road segment in one direction, and the driving direction of the road segment is used as the The associated attributes of road sections; Step 2, obtaining all GPS trajectory data of n buses within a certain period of time T; Step 3, matching all GPS trajectory data of n buses to the bus road network data structure; Step 4, The average speed of the h buses matched to the corresponding road segment is used as the road condition information of the actual road segment. The invention utilizes point elements and line elements to construct the data structure of the entire bus road network, which accurately reflects the road conditions of the road section.

The invention provides a matching method and system for a dynamic traffic information road network and a navigation electronic map. The method comprises the steps of splitting a single-lane two-way unit section, a single-lane two-way dynamic traffic information section and a mixed dynamic traffic information section into single-lane one-way sections according to a first matching rule, a second matching rule and a third matching rule respectively; and performing matching and correction on a single-lane one-way dynamic traffic information section and a single-lane one-way unit section according to a fourth matching rule, a fifth matching rule and a sixth matching rule respectively to obtain a dynamic traffic information section matching table, and displaying the dynamic traffic information section matching table on a terminal interface. According to the matching method and system for the dynamic traffic information road network and the navigation electronic map, the accurate dynamic traffic information section matching table is quickly obtained in a mode of matching the dynamic traffic information road network with the navigation electronic map based on a matching graphic layer, thereby providing a guarantee for accurately displaying and using dynamic road condition information in a navigation terminal using navigation electronic maps of different versions and different brands or other products.