Road traffic control method and system

Abstract

The invention is suitable for the field of computers, and provides a road traffic control method and system, and the method comprises the steps: obtaining the traffic real-time change information on a road and the real-time position of a vehicle, and obtaining a navigation route selected by a vehicle-mounted terminal; planning a plurality of updated navigation routes from the current position of the vehicle to the destination along with the traveling of the vehicle and the change information of the traffic condition, and analyzing the time duration of the plurality of updated navigation routes and the currently selected navigation route; and timely recommending the updated navigation route with the shortest time to the vehicle-mounted terminal. The navigation route can be changed along with the change of the current road condition, the vehicles can avoid the congested road section and arrive at the destination at the fastest speed, and the vehicles can be shunted to different road sections by re-planning the navigation route, so that the dynamic allocation of the traffic congestion road section and the normal road section is achieved, and the traffic congestion is avoided. The effective utilization rate of urban roads is improved, and an urban traffic system is in a benign operation state.

Description

Technical Field

[0001] The present invention belongs to the field of computers, and in particular, relates to a road traffic control method and system. Background Art

[0002] Road traffic control refers to the general term for the planning, organization, command, coordination and control of road traffic by the relevant traffic management departments in accordance with technical specifications, with the basic goals of orderly, safe and smooth road traffic, using modern management theories and advanced science and technology, and taking a variety of methods. Traffic control, also known as traffic signal control or urban traffic control, is to rely on human command or the use of traffic signal control facilities to command the passage of vehicles and pedestrians according to the changing characteristics of traffic.

[0003] In the existing road traffic control signal system, as well as in the existing auxiliary road traffic control system, such as intersection traffic lights and red light camera systems, camera monitoring systems, electronic sign information announcements, street lights, radio station announcements, etc., they are all used for level crossing or local traffic control, and are set at specific locations; when various existing vehicle positioning systems are applied to highway traffic, a navigator is usually set on the vehicle to provide guidance on the starting and ending routes of the vehicle; the above-mentioned existing technologies cannot realize the long-distance, continuous and dynamic display of the occupancy of linear road lanes, the vehicle driving status and the vehicle distance.

[0004] The traffic lights and navigation methods in the prior art are fixed. For the real-time changes in the road, the navigation cannot promptly remind the driver or change the selected navigation route according to the changes in road traffic. This results in some sections of the road being very congested during certain time periods while other sections are very smooth, resulting in poor traffic efficiency and low effective utilization of urban roads. In addition, the existing traffic lights do not have the ability to intelligently adjust and guide traffic according to changes in road traffic volume. Summary of the invention

[0005] The embodiments of the present invention provide a road traffic control method and system, aiming to solve the problem that the traffic lights and navigation methods in the prior art are fixed, the navigation route cannot be changed according to the changes in road traffic conditions, resulting in poor traffic efficiency and low effective utilization of urban roads.

[0006] The embodiment of the present invention is implemented as follows: on the one hand, a road traffic control method includes: Obtain real-time traffic change information on the road and the real-time location of vehicles; Plan multiple navigation routes based on the vehicle's location; Analyze the duration of multiple navigation routes based on real-time traffic change information and send the analysis results to the vehicle terminal; Obtain the navigation route selected by the vehicle terminal and update the real-time position of the vehicle on the navigation route; As the vehicle moves and traffic conditions change, when the vehicle is traveling on the navigation route, multiple updated navigation routes are planned from the vehicle's current location to the destination, and the duration of the multiple updated navigation routes and the currently selected navigation route is analyzed; Determine whether the duration of the multiple updated navigation routes is less than the duration of the currently selected navigation route; When the time taken by one of the multiple updated navigation routes is shorter than the time taken by the currently selected navigation route, a reminder message for updating the navigation route is sent to the vehicle-mounted terminal, and the currently selected navigation route is automatically replaced with the updated navigation route with the shortest time taken.

[0007] As an improved solution of the present invention, the step of obtaining the real-time traffic change information on the road and the real-time position of the vehicle specifically includes: Obtain satellite photos of the road and the real-time location of the vehicle as fed back by the vehicle positioning system; Based on satellite photos of the road, the occupied road area covered by vehicles and the unoccupied road area in each road section are identified; the occupied road area includes the area occupied by vehicles driving on the road and the area occupied by vehicles parked on both sides of the road; the occupied road area and the unoccupied road area change in real time as vehicles enter and exit the road.

[0008] As another improvement of the present invention, the time duration of analyzing multiple navigation routes according to the real-time traffic change information specifically includes: Count the total occupied road area, the total unoccupied road area and the number of traffic lights on all roads passed by each navigation route; According to the total occupied road area and the total unoccupied road area, the road utilization rate on each navigation route is obtained; Determine whether the road usage rate is greater than the normal usage rate; When the road usage rate is not greater than the normal usage rate, the vehicle driving time is calculated according to the navigation route length and the average driving speed; When the road usage rate is greater than the normal usage rate, the congestion rate is obtained by subtracting the normal usage rate from the road usage rate. According to the linear relationship between the congestion rate and the extension time, the congestion rate is converted into the extension time. According to the number of traffic lights and the average blocking time of each traffic light, the waiting time is obtained; The vehicle driving time, extension time and waiting time corresponding to each navigation route are added together to obtain the time required for the vehicle to reach the destination.

[0009] As a further solution of the present invention, as the vehicle moves along and the traffic conditions change information, when the vehicle is traveling on the navigation route, multiple updated navigation routes are planned from the current position of the vehicle to the destination, and the duration of the multiple updated navigation routes and the currently selected navigation route is analyzed, specifically including: As the vehicle moves and traffic conditions change, the real-time location of the vehicle and updated road satellite photos are continuously obtained; Plan multiple updated navigation routes based on updated vehicle real-time positions and updated road satellite photos; Recalculate the time required to complete the remaining sections of the navigation route and the time required to update the navigation route.

[0010] As an optimization solution of the present invention: when the time duration of one of the multiple updated navigation routes is less than the time duration of the currently selected navigation route, a reminder message for updating the navigation route is sent to the vehicle-mounted terminal, and the currently selected navigation route is automatically replaced with the updated navigation route with the shortest time duration, specifically including: When the time taken by one of the multiple updated navigation routes is less than the time taken by the currently selected navigation route, a reminder message for updating the navigation route is sent to the vehicle terminal; The duration of the reminder message will be counted starting from the time it is sent. Receive an operation instruction fed back by the operation terminal, and drive according to the navigation route selected by the operation instruction; the operation instruction is to maintain the current navigation route or to replace and update the navigation route; When the sending time is longer than the preset time, the currently selected navigation route will be automatically replaced with the updated navigation route with the shortest time.

[0011] As another solution of the present invention: when the road usage rate is greater than the normal usage rate, the method further includes: Roads with a marked road usage rate greater than the normal usage rate are congested roads, and roads with a marked road usage rate not greater than the normal usage rate are unobstructed roads; Locate unobstructed roads associated with congested roads through analysis of road satellite photos; Shorten the waiting time for traffic lights on congested roads to the clearing time, and extend the waiting time for traffic lights on unobstructed roads to the regulation time.

[0012] In another aspect, a road traffic control system includes: An information acquisition module is used to obtain real-time traffic change information on the road and the real-time location of the vehicle; Route planning module, used to plan multiple navigation routes according to the vehicle's location; Duration analysis module, used to analyze the duration of multiple navigation routes based on real-time traffic change information, and send the analysis results to the vehicle terminal; The information update module is used to obtain the navigation route selected by the vehicle-mounted terminal and update the real-time position of the vehicle on the navigation route; The route update module is used to plan multiple updated navigation routes from the current position of the vehicle to the destination as the vehicle moves along the navigation route and the traffic conditions change, and analyze the time taken by the multiple updated navigation routes and the currently selected navigation route; The duration comparison module is used to determine whether the duration of multiple updated navigation routes is less than the duration of the currently selected navigation route; The route replacement module is used to send a reminder message to the vehicle-mounted terminal to update the navigation route when the time required for one of the multiple updated navigation routes is less than the time required for the currently selected navigation route, and automatically replace the currently selected navigation route with the updated navigation route with the shortest time.

[0013] The beneficial effects of the present invention are as follows: by acquiring the real-time traffic change information on the road and the real-time position of the vehicle, and acquiring the navigation route selected by the vehicle-mounted terminal, and updating the real-time position of the vehicle on the navigation route; with the movement of the vehicle and the change information of the traffic conditions, when the vehicle is traveling on the navigation route, planning multiple updated navigation routes from the current position of the vehicle to the destination, and analyzing the time durations of the multiple updated navigation routes and the currently selected navigation route; when the time duration of a navigation route among the multiple updated navigation routes is less than the time duration of the currently selected navigation route, sending a reminder message of updating the navigation route to the vehicle-mounted terminal, and automatically replacing the currently selected navigation route with the shortest updated navigation route, so that the navigation route can be changed with the change of the current road conditions, so that the vehicle can avoid the congested section and reach the destination at the fastest speed, and through the re-planning of the navigation route, the vehicle can also be diverted to different sections, so as to achieve dynamic allocation of traffic congested sections and normal sections, so that the effective utilization rate of urban roads is improved, and the urban transportation system is in a benign operation state. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a main flow chart of a road traffic control method; Figure 2 A flowchart for updating a navigation route in a road traffic control method; Figure 3 It is a flowchart of navigation route replacement in a road traffic control method; Figure 4 It is a flow chart of traffic light control in a road traffic control method; Figure 5 It is a schematic diagram of the internal structure of a road traffic control system. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0016] The present invention obtains the real-time traffic change information on the road and the real-time position of the vehicle, obtains the navigation route selected by the vehicle-mounted terminal, and updates the real-time position of the vehicle on the navigation route; with the movement of the vehicle and the change information of the traffic conditions, when the vehicle is traveling on the navigation route, multiple updated navigation routes are planned from the current position of the vehicle to the destination, and the time durations of the multiple updated navigation routes and the currently selected navigation route are analyzed; when the time duration of one of the multiple updated navigation routes is less than the time duration of the currently selected navigation route, a reminder message of updating the navigation route is sent to the vehicle-mounted terminal, and the currently selected navigation route is automatically replaced with the updated navigation route with the shortest time duration, so that the navigation route can be changed with the change of the current road conditions, so that the vehicle can avoid the congested road section and reach the destination at the fastest speed, and through the re-planning of the navigation route, the vehicle can also be diverted to different road sections, so as to achieve dynamic allocation of traffic congested road sections and normal road sections, so that the effective utilization rate of urban roads is improved, and the urban transportation system is in a benign operation state.

[0017] Figure 1 A main flow chart of a road traffic control method according to an embodiment of the present invention is shown. The road traffic control method includes: Get real-time traffic change information on the road and the real-time location of vehicles.

[0018] Plan multiple navigation routes based on the vehicle's location.

[0019] Based on real-time traffic change information, the duration of multiple navigation routes is analyzed and the analysis results are sent to the vehicle end.

[0020] Obtain the navigation route selected by the vehicle terminal and update the real-time position of the vehicle on the navigation route. The above steps are performed at the vehicle start-up stage to plan the most reasonable navigation route for the vehicle and guide the vehicle to start smoothly.

[0021] As the vehicle moves and traffic conditions change, multiple updated navigation routes are planned from the vehicle's current location to the destination while the vehicle is traveling on the navigation route, and the time taken to travel through the multiple updated navigation routes and the currently selected navigation route is analyzed. Because as the vehicle travels, the road conditions on different roads change in real time over time, and some sections may not be congested when the route is initially planned, but after a period of time, some sections on the navigation route may become congested. In this case, if the vehicle continues to travel on the initially planned navigation route, the time taken to reach the destination will increase, and the time taken to travel through the sections may be relatively shorter.

[0022] Determine whether the time taken to update multiple navigation routes is less than the time taken to update the currently selected navigation route, and find a route on the updated navigation route that is shorter than the initially selected navigation route. Of course, the above real-time update steps are all performed in the system background and are not displayed on the operation end.

[0023] When the time required for one of the multiple updated navigation routes is shorter than the time required for the currently selected navigation route, a reminder message for updating the navigation route is sent to the vehicle terminal, and the currently selected navigation route is automatically replaced with the updated navigation route with the shortest time required. Of course, among the multiple updated navigation routes, there may be more than one navigation route with a time required that is shorter than the time required for the currently selected navigation route. In this case, the route with the shortest time required is recommended first. Of course, if the user wants to pass through other places on the way to the destination, the user can independently select other recommended updated navigation routes on the operating terminal.

[0024] In one case of this embodiment, the obtaining of the real-time traffic change information on the road and the real-time position of the vehicle specifically includes: Get satellite photos of the road and the real-time location of the vehicle as reported by the vehicle positioning system.

[0025] Based on satellite photos of the road, the occupied road area and unoccupied road area covered by vehicles in each section of the road are identified. The occupied road area includes the area occupied by vehicles driving on the road and the area occupied by vehicles parked on both sides of the road. The occupied road area and the unoccupied road area change in real time as vehicles enter and exit. This method estimates whether a road is in a congested state by the density of vehicles on the road surface. Of course, this method is used for sections of road where normal driving occurs. If it is placed on a section of road where an accident occurs, other methods can be used for estimation.

[0026] In one case of this embodiment, analyzing the duration of multiple navigation routes according to the real-time traffic change information specifically includes: The total area of ​​currently occupied roads, the total area of ​​unoccupied roads and the number of traffic lights on all roads passed by each navigation route are counted respectively.

[0027] The road utilization rate on each navigation route is obtained based on the total occupied road area and the total unoccupied road area.

[0028] Determine whether the road usage rate is greater than the normal usage rate. If the normal usage rate of a road is 40%, when the road usage rate is less than 40%, vehicles will not be congested, and vehicles only need to wait once at most when passing a traffic light to pass; but if the road usage rate is not less than 40%, vehicles will be congested on the road and will not be able to pass the traffic light in a short time. They need to wait at least twice at the traffic light before they can pass.

[0029] When the road usage rate is not greater than the normal usage rate, the vehicle driving time is calculated according to the length of the navigation route and the average driving speed.

[0030] When the road usage rate is greater than the normal usage rate, the congestion rate is obtained by subtracting the normal usage rate from the road usage rate. According to the linear relationship between the congestion rate and the extension time, the congestion rate is converted into the extension time. Because the greater the congestion rate, the longer the waiting time after the red light will be, the lower the speed on the road will be, and there is a linear relationship between the congestion rate and the extension time.

[0031] The waiting time is obtained based on the number of traffic lights and the average blocking time of each traffic light.

[0032] The vehicle driving time, extension time and waiting time corresponding to each navigation route are added together to obtain the time required for the vehicle to reach the destination.

[0033] Figure 2 A flowchart of updating a navigation route in a road traffic control method according to an embodiment of the present invention is shown. The method of planning multiple updated navigation routes from the current position of the vehicle to the destination when the vehicle is traveling on the navigation route according to the movement of the vehicle and the change information of the traffic conditions, and analyzing the duration of the multiple updated navigation routes and the currently selected navigation route specifically includes: As the vehicle moves and traffic conditions change, the real-time location of the vehicle and updated road satellite photos are continuously obtained.

[0034] According to the updated real-time vehicle position and updated road satellite photos, multiple updated navigation routes are planned. The updated navigation routes are the shortest routes radiating from the current vehicle position to the destination.

[0035] Recalculate the time required to complete the remaining sections of the navigation route and the time required to update the navigation route.

[0036] Figure 3 A flowchart of replacing a navigation route in a road traffic control method according to an embodiment of the present invention is shown. When the duration of one of the multiple updated navigation routes is less than the duration of the currently selected navigation route, a reminder message for updating the navigation route is sent to the vehicle-mounted terminal, and the currently selected navigation route is automatically replaced with the updated navigation route with the shortest duration, specifically comprising: When the duration of one of the multiple updated navigation routes is less than the duration of the currently selected navigation route, a reminder message for updating the navigation route is sent to the vehicle-mounted terminal.

[0037] The duration of the reminder message starts from when it is sent.

[0038] Receive the operation instruction fed back by the operation terminal, and drive according to the navigation route selected by the operation instruction. The operation instruction is to maintain the current navigation route or to replace and update the navigation route.

[0039] When the sending time is longer than the preset time, the currently selected navigation route will be automatically replaced with the updated navigation route with the shortest time. This can reduce the driver's operation and automatically switch routes when the driver is concentrating on driving.

[0040] Figure 4 A flow chart of traffic light control in a road traffic control method according to an embodiment of the present invention is shown. When the road usage rate is greater than the normal usage rate, the method further includes: Roads whose marked road usage rate is greater than the normal usage rate are congested roads, and roads whose marked road usage rate is not greater than the normal usage rate are unobstructed roads.

[0041] By analyzing road satellite photos, smooth roads associated with congested roads can be located.

[0042] Shorten the waiting time for traffic lights on congested roads to the clearing time, and extend the waiting time for traffic lights on unobstructed roads to the regulation time. Flexible regulation of urban road usage is carried out, and the changed traffic light duration is published on the cloud so that the navigation system and the positioning system can obtain these adjusted duration data in a timely manner, recommend more reasonable routes for vehicles, and thus divert vehicles to non-congested roads and reduce the pressure on individual congested roads.

[0043] Figure 5 A schematic diagram of the internal structure of a road traffic control system according to an embodiment of the present invention is shown, wherein the road traffic control system comprises: The information acquisition module 100 is used to acquire real-time traffic change information on the road and the real-time position of the vehicle.

[0044] The route planning module 200 is used to plan multiple navigation routes according to the location of the vehicle.

[0045] The duration analysis module 300 is used to analyze the duration of multiple navigation routes based on real-time traffic change information and send the analysis results to the vehicle-mounted terminal.

[0046] The information updating module 400 is used to obtain the navigation route selected by the vehicle-mounted terminal and update the real-time position of the vehicle on the navigation route.

[0047] The route update module 500 is used to plan multiple updated navigation routes from the vehicle's current position to the destination as the vehicle moves along the navigation route and the traffic conditions change, and analyze the time required for the multiple updated navigation routes and the currently selected navigation route.

[0048] The duration comparison module 600 is used to determine whether the duration of the multiple updated navigation routes is less than the duration of the currently selected navigation route.

[0049] The route replacement module 700 is used to send a reminder message to the vehicle-mounted terminal to update the navigation route when the time duration of one of the multiple updated navigation routes is less than the time duration of the currently selected navigation route, and automatically replace the currently selected navigation route with the updated navigation route with the shortest time duration.

[0050] In order to load the above-mentioned method and system and enable it to run smoothly, the system, in addition to the various modules mentioned above, may also include more or fewer components than described above, or a combination of certain components, or different components, for example, it may include input and output devices, network access devices, buses, processors and memories, etc.

[0051] It should be understood that, although each step in the flow chart of each embodiment of the present invention is shown in sequence according to the indication of the arrow, these steps are not necessarily performed in sequence according to the order indicated by the arrow. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be performed in other orders. Moreover, at least a portion of the steps in each embodiment may include a plurality of sub-steps or a plurality of stages, and these sub-steps or stages are not necessarily performed at the same time, but can be performed at different times, and the execution order of these sub-steps or stages is not necessarily performed in sequence, but can be performed in turn or alternately with at least a portion of other steps or sub-steps or stages of other steps.

[0052] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The above-mentioned embodiments only express several preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A road traffic control method, characterized in that: The method comprises: Obtain real-time traffic change information on the road and the real-time location of vehicles; Plan multiple navigation routes based on the vehicle's location; Analyze the duration of multiple navigation routes based on real-time traffic change information and send the analysis results to the vehicle terminal; Obtain the navigation route selected by the vehicle terminal and update the real-time position of the vehicle on the navigation route; As the vehicle moves and traffic conditions change, when the vehicle is traveling on the navigation route, multiple updated navigation routes are planned from the vehicle's current location to the destination, and the duration of the multiple updated navigation routes and the currently selected navigation route is analyzed; Determine whether the duration of the multiple updated navigation routes is less than the duration of the currently selected navigation route; When the time taken by one of the multiple updated navigation routes is shorter than the time taken by the currently selected navigation route, a reminder message for updating the navigation route is sent to the vehicle-mounted terminal, and the currently selected navigation route is automatically replaced with the updated navigation route with the shortest time taken; The analyzing the duration of multiple navigation routes according to the real-time traffic change information specifically includes: Count the total occupied road area, the total unoccupied road area and the number of traffic lights on all roads passed by each navigation route; According to the total occupied road area and the total unoccupied road area, the road utilization rate on each navigation route is obtained; Determine whether the road usage rate is greater than the normal usage rate; When the road usage rate is not greater than the normal usage rate, the vehicle driving time is calculated according to the navigation route length and the average driving speed; When the road usage rate is greater than the normal usage rate, the congestion rate is obtained by subtracting the normal usage rate from the road usage rate. According to the linear relationship between the congestion rate and the extension time, the congestion rate is converted into the extension time. According to the number of traffic lights and the average blocking time of each traffic light, the waiting time is obtained; The vehicle driving time, extension time and waiting time corresponding to each navigation route are added together to obtain the time required for the vehicle to reach the destination.

2. The road traffic control method according to claim 1, characterized in that: The obtaining of the real-time traffic change information on the road and the real-time position of the vehicle specifically includes: Obtain satellite photos of the road and the real-time location of the vehicle as fed back by the vehicle positioning system; Based on satellite photos of the road, the occupied road area covered by vehicles and the unoccupied road area in each road section are identified; the occupied road area includes the area occupied by vehicles driving on the road and the area occupied by vehicles parked on both sides of the road; the occupied road area and the unoccupied road area change in real time as vehicles enter and exit the road.

3. The road traffic control method according to claim 1, characterized in that: The method of planning multiple updated navigation routes from the current position of the vehicle to the destination as the vehicle moves along the navigation route and the changing information of the traffic conditions, and analyzing the duration of the multiple updated navigation routes and the currently selected navigation route specifically includes: As the vehicle moves and traffic conditions change, the real-time location of the vehicle and updated road satellite photos are continuously obtained; Plan multiple updated navigation routes based on updated vehicle real-time positions and updated road satellite photos; Recalculate the time required to complete the remaining sections of the navigation route and the time required to update the navigation route.

4. The road traffic control method according to claim 1, characterized in that: When the duration of one of the multiple updated navigation routes is shorter than the duration of the currently selected navigation route, a reminder message for updating the navigation route is sent to the vehicle-mounted terminal, and the currently selected navigation route is automatically replaced with the updated navigation route with the shortest duration, specifically including: When the time taken by one of the multiple updated navigation routes is less than the time taken by the currently selected navigation route, a reminder message for updating the navigation route is sent to the vehicle terminal; The duration of the reminder message will be counted starting from the time it is sent. Receive an operation instruction fed back by the operation terminal, and drive according to the navigation route selected by the operation instruction; the operation instruction is to maintain the current navigation route or to replace and update the navigation route; When the sending time is longer than the preset time, the currently selected navigation route will be automatically replaced with the updated navigation route with the shortest time.

5. The road traffic control method according to claim 3, characterized in that: When the road usage rate is greater than the normal usage rate, the method further includes: Roads with a marked road usage rate greater than the normal usage rate are congested roads, and roads with a marked road usage rate not greater than the normal usage rate are unobstructed roads; Locate unobstructed roads associated with congested roads through analysis of road satellite photos; Shorten the waiting time for traffic lights on congested roads to the clearing time, and extend the waiting time for traffic lights on unobstructed roads to the regulation time.

6. A road traffic control system, characterized in that: The system comprises: An information acquisition module is used to obtain real-time traffic change information on the road and the real-time location of the vehicle; Route planning module, used to plan multiple navigation routes according to the vehicle's location; Duration analysis module, used to analyze the duration of multiple navigation routes based on real-time traffic change information, and send the analysis results to the vehicle terminal; The information update module is used to obtain the navigation route selected by the vehicle-mounted terminal and update the real-time position of the vehicle on the navigation route; The route update module is used to plan multiple updated navigation routes from the current position of the vehicle to the destination as the vehicle moves along the navigation route and the traffic conditions change, and analyze the time taken by the multiple updated navigation routes and the currently selected navigation route; The duration comparison module is used to determine whether the duration of multiple updated navigation routes is less than the duration of the currently selected navigation route; The route replacement module is used to send a reminder message to the vehicle-mounted terminal to update the navigation route when the time required for one of the multiple updated navigation routes is less than the time required for the currently selected navigation route, and automatically replace the currently selected navigation route with the updated navigation route with the shortest time.

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