34results about How to "Reduce queue length" patented technology

The invention discloses an intelligent traffic signal control method based on open-source road condition information, and solves the problem that the intelligent degree of traffic signal control stillneeds to be improved in the prior art. The method comprises the following steps: step 1, collecting traffic data under an open-source real-time road condition; 2, evaluating a congestion index; 3, constructing an intelligent signal period model; and step 4, constructing an intersection signal lamp timing model based on the open-source real-time road condition traffic data. The technology is mainly used for coping with traffic congestion in peak hours; experimental results are consistent with expectations; the heavier the traffic is, the better the relieving effect of the method is; the congestion queuing is reduced by 16.14% under a general congestion condition, while the congestion queuing is reduced by 29.99% under a severe congestion condition, so that the traffic capacity of the roadis obviously improved; and on one hand, the urban road construction cost can be saved, and on the other hand, the vehicle travel cost can be reduced.

The invention discloses an urban road layering dynamic coordination control algorithm and a control method. An urban road is longitudinally divided into three layers and transversely divided into different control sub-areas. The control range and control parameters of each sub-area on different layers are dynamically updated according to real-time dynamic traffic data to achieve an aim of dynamic coordination control of the traffic flow on each layer of the urban road. Checking analysis indicates that the urban road layering coordination control technology obviously increases the average speed of a vehicle, vehicles on each layer can quickly leave each sub-area, and the problem of traffic stream congestion of urban road is effectively relieved.

The present invention relates to a request scheduling method and device for a cloud data center. The method includes performing the following steps in each time stamp: S1. Obtain the queue length of servers in each data center at the beginning of the time stamp; S2 . Calculate the first objective function value of each data center, and distribute all service requests in the timestamp to the data center with the largest first objective function value; S3. Initialize the second objective function value to negative infinity; S4. For each operating frequency in the operating frequency set of each data center, determine the optimal operating frequency and optimal operating quantity of the data center; S5, for each data center, the optimal operating quantity determined in S4 The server is turned on, and the running frequency of each turned on server is adjusted to the optimal running frequency determined in S4. The present invention can reduce the queue length under the condition of increasing the system benefit, and realize the compromise between the system benefit and the queue length.

The invention discloses a safety driving control method through yellow light signal on an intersection based on a wireless technology. The method comprises the following steps: step 1, detecting the current velocity v of a car and the distance S (v) to a parking line; step 2, transmitting the collected data to a database of a center control computer; step 3, calculating the required distance S, within which the car completely stops at the current velocity v; step 4, generating a corresponding command according to the comparison result of S and S (v); step 5, adjusting the time ty<0> of a yellow light; step 6, transmitting the corresponding command to a vehicle-mounted terminal or a mobile terminal of the corresponding car; step 7, broadcasting driving tips by the vehicle-mounted terminal or the mobile terminal after receiving the command. According to the safety driving control method through the yellow light signal on the intersection based on the wireless technology, an intelligent active reminding technology is adopted to provide timely, accurate and enough guidance information for drivers, safe and efficient transit capacity is realized when the yellow light is turned on, fast, comfortable and safe road efficiency is completely played, and the safety driving control method is suitably popularized and applied to Internet of Vehicles in future.

The invention discloses a motor vehicle multipath intersection passing method through disperse signal control and organization. The passing method comprises following steps: S1, successively numbering inlet channels of n paths of signal controlled intersections as 1, 2,..., i,..., n; S2, by use of internal space of the intersections, transforming each inlet of the n paths of signal controlled intersections into a micro-type intersection formed by three inlet channels; S3, using the inlet channel I of the original n paths of signal controlled intersections as one inlet channel of the micro-type intersection, wherein the inlet channel is formed by n-1 paths of lanes and is lead to rest n-1 outlet directions of the n paths of signal controlled intersections; and S4, forming the other two inlet channels of the micro-type intersection by a connection line of an inlet channel i and the adjacent inlet channel i-1 and a parallel line of the connection line as well as a connection line of an inlet channel i and the adjacent inlet channel i+1 and a parallel line of the connection line. According to the invention, average saturation and average vehicle delay of the intersection are reduced; passing ability of the inlet channels is improved; and queuing length is reduced.

The present invention provides a dynamic lane switching control method, device, electronic equipment and storage medium, the method comprising: obtaining the initial queuing length and the initial queuing accumulation speed of the dynamic lane in the current entrance lane; the dynamic lane includes a target lane and a variable guiding lane , the first direction is the current traffic direction of the variable steerable lane, the second direction is the traffic direction after the variable steerable lane is switched; the target lane traffic direction is the first direction or the second direction; obtain the entrance after the variable steerable lane is pre-switched The switching queue length and the switching queue accumulation speed of the dynamic lane in the road; determine whether to switch the traffic direction of the variable guide lane according to the initial queue length, the initial queue accumulation speed, the switching queue length and the switching queue accumulation speed; when switching, the control can The traffic direction of the steering lane is changed from the first direction to the second direction. The invention reduces the queuing length of the entrance road, and avoids problems such as queuing overflow and left-turn blocking as much as possible.

The invention discloses a station for buses of multiple paths to stop and belongs to the field of urban road traffic. The station for the buses of multiple paths to stop comprises a vehicle and non-motor vehicle isolation belt arranged on a road. At least two waiting islands are arranged on the vehicle and non-motor vehicle isolation belt. A parking zone for the buses is arranged between two adjacent waiting islands, wherein passengers get on or off the buses in the park zone. Station entrance front ends and station exit rear ends of the parking zone are respectively connected with a bus special lane. The bus special lanes are arranged to be adjacent to the vehicle and non-motor vehicle isolation belt. Thus, multiple buses can park at the bus station at the same time. Buses at different bus station entrances do not interfere with each other. Obstruction on passing of social vehicles by parking of the buses is greatly relived and meanwhile, the number of lanes for the social vehicles at entrance lanes of an intersection is increased.

The present invention proposes a signal timing and vehicle speed dynamic coordination control optimization method based on vehicle-road coordination. First, based on the original green wave coordination scheme of the coordinated arterial road, and according to the traffic flow information parameters and the initial detection of the incoming flow of the target fleet on the road section, Calculating the increment of green light time is beneficial to improve the traffic capacity of the coordinated intersection and reduce the queue length of the intersection when the target vehicle traffic increases; according to the actual driving speed of the target vehicle team, combined with the optimal design speed of the original green wave coordination scheme of the coordinated arterial road , to calculate the green light adjustment time of the coordinated intersection, which is beneficial to obtain the maximum green wave bandwidth and minimize the number of parking of straight vehicles. Under the dynamic optimization of timing, the driving behavior of vehicles is adjusted to ensure the efficiency of road traffic.

The invention discloses a collision risk-based method for assigning the right of way between an automatic driving vehicle and a non-motor vehicle. The method first judges whether there is a conflict point between the self-driving vehicle and the non-motor vehicle, and if there is a conflict point, calculates the collision risk; The self-driving vehicles and non-motorized vehicles whose collision risk is higher than the threshold calculate the street crossing urgency coefficient, and give priority to the right of way for the vehicle with the higher street crossing urgency coefficient. The invention takes safety as the primary principle, and scientifically allocates the right of way of vehicles through the information interaction between the automatic driving vehicle and the non-motor vehicle and the vehicle-road coordination technology at the intersection of the non-signal-controlled road intersection where the self-driving vehicle and the non-motor vehicle are mixed. Change the situation that self-driving vehicles always give way to non-motor vehicles, so as to reduce the waiting time of vehicles, increase the traffic speed at intersections, and make self-driving vehicles and non-motor vehicles coexist harmoniously.

The invention provides a plane-sensing intersection traffic signal control method and system giving consideration to non-motor vehicles, and the method and system can carry out the tracking and monitoring of non-motor vehicles in real time, adjust the duration of green lights according to the length of a queue of the non-motor vehicles during red lights, and guarantee that the length of the queue of the non-motor vehicles is less than a set threshold value. Moreover, after the length of the queue of the non-motor vehicles is greater than the set threshold value, a control scheme of reducing the number of times that a motor vehicle meets with the red lights, so as to reduce the number of times that the vehicle waits during red lights.