Road warning methods, devices, systems and control equipment

Abstract

This invention provides a road warning method, device, and navigation system. The method includes obtaining the estimated arrival time of a vehicle exiting a target exit on a currently planned route to its destination; obtaining the detour arrival time if the vehicle misses the target exit and replans a route to reach the destination; determining whether the difference between the detour arrival time and the estimated arrival time is greater than a detour time difference threshold; and generating a warning signal to indicate the importance of the target exit if the difference between the detour arrival time and the estimated arrival time is greater than or equal to the detour time difference threshold.

Description

Technical Field

[0001] This invention relates to automotive navigation control technology, and more particularly to a method for reminding drivers of road exits. Background Technology

[0002] With the continuous development of navigation technology, people are increasingly relying on car navigation services to determine the most suitable driving route and to follow navigation prompts along the predetermined path during the journey, such as leaving the current road and switching to another road. Moreover, as navigation services become more intelligent and accurate, navigation systems will also replan the route based on traffic conditions or when the vehicle deviates from the predetermined driving route.

[0003] Current navigation services often fail to provide timely or sufficiently strong prompts when a vehicle needs to exit or switch to another road. This is a significant reason why drivers may not fully notice these route change prompts, leading to deviations from the intended route. In some cases, failing to exit or switch to another road in time may result in limited time-related changes; however, in other situations, such as failing to exit the highway in time, the limited number of highway exits can cause significant deviations from the destination, severely impacting the expected arrival time. Summary of the Invention

[0004] This invention proposes an improved navigation service method and system. This method can assess the importance or cost of a target road exit ahead during vehicle travel, and then issue a prompt signal indicating the importance of the exit ahead when it is determined that the exit ahead is critical.

[0005] According to one aspect of the present invention, a road warning method is provided, comprising: obtaining the estimated arrival time of a vehicle from a target exit of a currently planned driving route to a destination; obtaining the detour arrival time of a replanned route to the destination if the vehicle misses the target exit; determining whether the difference between the detour arrival time and the estimated arrival time is greater than a detour time difference threshold; and generating a warning signal to indicate the importance of the target exit if the difference between the detour arrival time and the estimated arrival time is greater than or equal to the detour time difference threshold.

[0006] According to one aspect of the present invention, a road warning device is provided, comprising: a time calculation module, configured to acquire the estimated arrival time of a vehicle from a target exit of a currently planned driving route to a destination, and to acquire the detour arrival time of a replanned route to the destination if the vehicle misses the target exit; a judgment module, configured to determine whether the difference between the detour arrival time and the estimated arrival time is greater than or equal to a detour time difference threshold; and an alarm generation module, configured to generate a warning signal to indicate the importance of the target exit if the difference between the detour arrival time and the estimated arrival time is greater than or equal to the detour time difference threshold.

[0007] According to one aspect of the present invention, an in-vehicle map navigation system is provided, comprising: a navigation module for providing navigation data to a vehicle, including planning a driving route and calculating travel time; a road reminder module, comprising: a time calculation module for calculating the estimated arrival time of the vehicle from a target exit of the currently planned driving route to a destination, and estimating the detour arrival time to reach the destination by replanning a route if the vehicle misses the target exit; a judgment module for judging whether the difference between the detour arrival time and the estimated arrival time is greater than a detour time difference threshold; and an alarm generation module for generating a warning signal to indicate the importance of the target exit if the difference between the detour arrival time and the estimated arrival time is greater than the detour time difference threshold.

[0008] According to one aspect of the present invention, a vehicle driving control device is provided, comprising: an in-vehicle map navigation system for providing navigation data to a vehicle, including a planned driving route and travel time; and an electronic control unit configured to perform the following operations: controlling the in-vehicle navigation system to provide an estimated arrival time for the vehicle to exit from a target exit of the currently planned driving route to reach a destination; controlling the in-vehicle navigation system to provide a detour arrival time for reaching the destination by replanning a route if the vehicle misses the target exit; determining whether the difference between the detour arrival time and the estimated arrival time is greater than or equal to a detour time difference threshold; and generating a warning signal to indicate the importance of the target exit if the difference between the detour arrival time and the estimated arrival time is greater than or equal to the detour time difference threshold. Attached Figure Description

[0009] Figure 1 The diagram illustrates the vehicle's driving route.

[0010] Figure 2 A block diagram of a road warning device according to the present invention is shown schematically;

[0011] Figure 3 A flowchart illustrating a road warning method according to an embodiment of the present invention is shown schematically.

[0012] Figure 4 This diagram illustrates a map navigation system.

[0013] Figure 5 A schematic diagram of the vehicle driving control equipment is shown. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only for the purpose of illustrating the present invention and are not restrictive.

[0015] Figure 1 This diagram schematically illustrates a route for a user traveling from origin S to destination D. As shown by the solid arrows, at departure, the user uses the map navigation system MNS to determine the optimal route R0. On the current road L, following route R0, the vehicle should exit at the target exit E0 to reach destination D in the optimal time and under optimal road conditions. However, if the vehicle fails to exit exit E0 in time, the navigation system MNS will replan the route. For example, as shown by the dashed arrows, the optimal routes R1 and R2 from exit E0 to destination D are proposed. After missing exit E0, the user continues along road L to the next exit E1, and then continues along either route R1 or R2 to reach destination D. In this invention, the map navigation system MNS can be any existing known map navigation system.

[0016] Routes R1 and R2 can be two routes with different estimated travel times T1 and T2 to reach destination D, or they can be two routes with different road conditions but roughly the same arrival time (i.e., T1 = T2). Clearly, compared to the time T0 it would take for a vehicle to normally exit E0 and reach destination D along route R0, if T1 or T2 is roughly the same as T0, missing exit E0 will not result in a waste of time for the user. However, if T1 or T2 is greater than T0, the user will incur a time cost for missing exit E0. Therefore, exit E0 becomes particularly important to the user in this case.

[0017] Figure 2A road alert device 100 according to an embodiment of the present invention is shown. The road alert device 100 can receive map data provided by a navigation system MNS, including routes, coordinates, and times. As shown, the road alert device 100 includes a time calculation module 101, a judgment module 102, and an alarm generation module 103. The time calculation module 101 is used to obtain the travel time of a vehicle traveling along a certain route between two locations. In one example of the present invention, the time calculation module 101 is configured to request the map navigation system MNS to provide the estimated arrival time T0 from the target exit E0 to the destination D along route R0 when the vehicle approaches the target exit E0, and to request the MNS to replan candidate routes from the target exit E0 to the destination D, such as R1 and R2 (e.g., ...). Figure 1 As shown, as an example, R1 or R2 here includes a route that starts from exit E0, continues along road L, and exits at the next exit E1, and the corresponding detour arrival times T1, T2 for candidate routes such as R1 and R2. The time calculation module 101 receives the detour arrival times T1, T2 and the estimated arrival time data T0 from the map navigation system MNS. Optionally, the time calculation module 101 may also request the map navigation system MNS to provide only the minimum time, such as T1, for the optimal detour route.

[0018] In another example, the time calculation module 101 is configured to automatically calculate the estimated arrival time T0 and the detour arrival time T1 or T2. For example, the time calculation module 101 can estimate the approximate travel time between two location coordinates based on traffic environment data provided by the navigation system MNS. In this embodiment, when the vehicle is traveling along the current road L, the time calculation module 101 is configured to calculate, based on the vehicle's current speed V, the estimated arrival time T0 for the vehicle to exit the target exit E0 of the current planned route R0 and continue along route R0 to reach the destination D when the vehicle approaches the target exit E0 along the predetermined planned route R0. Simultaneously, the time calculation module 101 also estimates the detour arrival time T1 or T2 for reaching the destination D from the exit E0 location along the replanned route R1 or R2, assuming the vehicle misses the target exit E0.

[0019] According to one embodiment of the present invention, in order to ensure that an alarm signal can be given in a timely manner, the road warning device 100 can use distance or time conditions to determine the degree of approach of a moving vehicle to the target exit E0, i.e., the proximity. For example, when the distance d between the vehicle and the target exit E0 is less than a predetermined proximity distance threshold d... T For example, at 500 meters, or at the current vehicle speed, the time to reach the target exit E0 is less than the predetermined approach time threshold t. T (For example, 30 seconds). Therefore, as... Figure 2As shown, as an example, the road warning device 100 may also include a proximity detection module 104 to determine the proximity of the vehicle's current position to the target exit E0. For example, the proximity detection module 104 may determine the real-time distance d between Pt and P0 based on the vehicle's current position Pt coordinates and the target exit E0 position P0 coordinates determined by the positioning module in the vehicle navigation system MNS, and if d is less than a distance threshold d0. T The proximity indication signal (AIS) is issued in a timely manner. In another example of the invention, traffic flow conditions can be further considered when providing the proximity indication signal (AIS). For example, when the vehicle speed is slow, it is obviously more meaningful to base the approach time on the target exit E0. Therefore, the proximity detection module 104 can also acquire the vehicle speed detected by the speed sensor configured on the vehicle or the speed information V provided by the vehicle navigation system, thereby estimating the time t to reach the target exit E0 based on the real-time distance d and speed V, and ensuring that t is less than a predetermined proximity time threshold t. T When the time arrives, an approach indication signal (AIS) is sent to the time calculation module 101. The time calculation module 101 only operates after receiving the approach indication signal (AIS) to obtain or calculate the estimated arrival times T0 and T1.

[0020] The judgment module 102 receives the smaller of the estimated arrival time T0 along route R0 from exit E0 provided by the time calculation module 101 and the detour arrival time T1 or T2 of route R1 or R2 replanned by the navigation system MNS if exit E0 is missed, for example, T1. The judgment module 102 then determines whether the time difference between T0 and T1 is greater than the detour time difference threshold Δ. T In this example, the detour time difference threshold Δ T It can be a value configured by the road warning device 100, such as 10 minutes or any other arbitrary value.

[0021] The alarm generation module 103 receives the judgment result output by the judgment module 102 and determines whether to generate a warning signal Sig_Alert to indicate the importance of the target exit E0. For example, if the difference between the detour arrival time T1 and the expected arrival time T0 is greater than or equal to the detour time difference threshold Δ T If the target exit E0 is significant, it indicates that the exit is crucial and missing it would result in substantial time waste. Therefore, the alarm generation module 103 generates a specific warning signal, Sig_Alert. Otherwise, if the difference between the detour arrival time T1 and the expected arrival time T0 is less than the detour time difference threshold Δ... T If the target exit E0 has little impact on the travel time to the destination, then the alarm generation module 103 does not need to output a specific warning signal, and the navigation system can simply remind the user to pay attention to exit E0 in the traditional way.

[0022] In the example above, the detour time difference threshold Δ is used to determine the importance of the target exit E0. T This value is pre-configured by the road warning device 100. Since different users, or even the same user in different situations, may have different sensitivities to travel time, according to a preferred embodiment of the invention, the road warning device 100 may further include a threshold determination module 105, such as... Figure 2 As shown, the detour time difference threshold Δ is used to determine the detour time difference for each user's trip. T For example, the detour time difference threshold Δ for this trip can be determined based on the user's selection of the currently planned driving route R0. T Specifically, when a user starts from point S and determines their route to destination D using the navigation system MNS, the system typically recommends at least three planned routes, such as R... 0-1 R 0-2 With R 0-3 It also provides the estimated travel time T for these three routes. 0-1 T 0-2 With T 0-3 And T 0-1 ≤T 0-2 ≤T 0-3 .

[0023] If the user ultimately selects R 0-1 The current driving route indicates that the user is time-sensitive, therefore the threshold determination module 105 can set Δ T =T 0-2 -T 0-1 and Δ T The value is provided to the decision module 102. In some cases, the user may also choose R. 0-2 or R 0-3 As the final driving route, it indicates that the user may be more concerned about factors such as road quality and less sensitive to time, therefore a Δ value can be set. T =Max[(T 0-2 -T 0-1 ),(T 0-3 -T 0-1 ),(T 0-3 -T 0-2 That is, the threshold determination module 105 can set the detour time difference threshold Δ. T The travel time T for the three candidate routes 0-1 T 0-2 With T 0-3 The larger of the two, and Δ T The value is provided to the judgment module 102.

[0024] The warning signal Sig_Alert generated by the alarm generation module 103 can be used to trigger a corresponding alarm. In one example, the warning signal Sig_Alert can be fed back to the map navigation system MNS, allowing the MNS system to highlight the target exit E0 ahead with greater intensity or in a more appropriate manner. For example, the MNS map navigation system can use a higher flashing frequency or a color change to highlight the exit E0 ahead and / or the importance of that exit.

[0025] In another or further embodiment of the invention, the warning signal Sig_Alert can also be provided to the vehicle's onboard control unit (ECU), so that based on the received warning signal Sig_Alert, the ECU can control vehicle accessories to enhance the indication of the importance of the upcoming exit. For example, after receiving the warning signal Sig_Alert, the ECU may further perform the following operations: if the vehicle's instrument panel is an LCD instrument panel, the background color or display frequency of the instrument panel may be changed; the turn signal on the side of the target exit E0 may be activated to remind the user of the exit. For example, when the target exit E0 is on the left side of the current road L, the left turn signal may be automatically activated to remind the user to drive along the left road at the upcoming fork in the road, and when the target exit E0 is on the right side of the current road L, the right turn signal may be automatically activated to remind the user to exit from the right-hand exit or drive along the right-hand road. In addition, the ECU may also generate video or image prompts on the vehicle's display screen, such as the central control screen, for example, displaying a cartoon avatar on the display screen to indicate the upcoming exit E0, and the cartoon avatar may simultaneously play voice prompts to indicate the upcoming exit.

[0026] In this invention, the principle of the invention is explained in terms of road exits. However, it is clear that "exit" here can be understood as either the exit of the current road L, such as a highway exit (Exit), or a fork in the road where the user needs to change lanes. Here, we will refer to it uniformly as "exit".

[0027] Figure 3 A flowchart of the road alert method according to the present invention is shown. In step 301, target exit information, such as exit E0, on the current driving route R0 is obtained. This target exit information E0 can be obtained from map data provided by a map navigation system (MNS). In a preferred embodiment, to ensure timely issuance of an alarm signal, the proximity between the vehicle's current position and the target exit E0 is further determined based on the obtained target exit E0. For example, the real-time distance d between Pt and P0 can be determined based on the vehicle's current position Pt coordinates and the target exit E0 position P0 coordinates determined by the positioning module within the vehicle navigation system (MNS), and d is less than a distance threshold d. TA proximity indication signal (AIS) is issued in a timely manner. In another example of the invention, proximity can also be represented by time. Therefore, the vehicle speed detected by the speed sensor on the vehicle or the speed information V provided by the vehicle navigation system is obtained, and the time t to reach the target exit E0 is estimated based on the real-time distance d and speed V, and if t is less than a predetermined proximity time threshold t T When the approach indication signal (AIS) is received, a proximity indication signal (AIS) is issued. In step 302, the estimated arrival time T0 from the target exit E0 to the destination D along route R0 is obtained. For example, the MNS is requested to calculate and provide the time T0. In step 303, assuming the target exit E0 is missed, i.e., route R0 is abandoned, the MNS is requested to replan the best candidate route from the target exit E0 to the destination D, such as R1, and the corresponding minimum detour arrival time T1, and the time T1 calculated by the MNS is received. In one example, the process of obtaining or calculating the estimated arrival times T0 and T1 can be initiated based on the received proximity indication signal (AIS).

[0028] In step 304, it is determined whether the time difference between the estimated arrival time T0 and the detour arrival time T1 is greater than the detour time difference threshold Δ. T The judgment result is then provided to step 305.

[0029] In step 305, based on the judgment result output in step 304, it is determined whether to generate a warning signal Sig_Alert to indicate the importance of the target exit E0. This is if the difference between the detour arrival time T1 and the expected arrival time T0 is less than the detour time difference threshold Δ. T If the target exit E0 has little impact on the travel time to the destination, then no specific warning signal will be output, and the navigation system can simply remind the user to pay attention to exit E0 in the traditional way. However, if the difference between the detour arrival time T1 and the estimated arrival time T0 is greater than or equal to the detour time difference threshold Δ, then... TIf the signal is received, it indicates that the target exit E0 is important, thus generating a specific warning signal Sig_Alert. The Sig_Alert warning signal can be used to trigger a corresponding alarm. In one example, the Sig_Alert warning signal can be fed back to the map navigation system (MNS), allowing the MNS to highlight the target exit E0 with a higher flashing frequency or a color change. In a further embodiment, the Sig_Alert warning signal can also be provided to the vehicle's onboard control unit (ECU), so that based on the received Sig_Alert warning signal, the ECU can control vehicle accessories to enhance the indication of the importance of the target exit E0. For example, after receiving the Sig_Alert warning signal, the ECU can further perform the following operations: if the vehicle's instrument panel is an LCD instrument panel, it can change the background color or display frequency of the instrument panel; it can activate the turn signal flashing on the target exit E0 side to remind the exit. Furthermore, the ECU can also generate video or image prompts on the vehicle's display screen, such as the central control screen, for example, displaying a cartoon avatar on the display screen to indicate the target exit, and simultaneously having the cartoon avatar play voice prompts to indicate the target exit.

[0030] As mentioned earlier, the time threshold Δ for determining the importance of the target export E0 is... T It can be a pre-configured value, while in another example, the threshold Δ T It can also be determined separately for each user's trip. Therefore Figure 3 The road alert method shown may also include determining a threshold Δ for the current trip based on when the user selects the currently planned driving route R0. T The steps.

[0031] In various embodiments of the present invention, the road reminder device 100 can be implemented independently and connected to the existing map navigation system MNS and ECU respectively, or it can be integrated into the ECU or the map navigation system MNS. Figure 4 A map navigation system MNS 400 according to the present invention is shown, which includes a navigation module 401 and a road alert module 402. The navigation module 401 can be implemented by a prior art map navigation system and can perform conventional functions such as route planning, travel time determination, and traffic flow reporting. The road alert module 402 can perform the functions of the road alert device 100 as described above. Therefore, the road alert module 402 includes a time calculation module, a judgment module, an alarm generation module, and optional proximity detection module and threshold determination module. The function and implementation of each module are the same as those of the aforementioned time calculation module 101, judgment module 102, alarm generation module 103, and optional proximity detection module 104 and threshold determination module 105, and will not be described again here.

[0032] Figure 5 A schematic diagram of a vehicle driving control device according to the present invention is shown. As shown, the control device 500 includes a map navigation system 501 and an electronic control unit (ECU) 502. The map navigation system 501 can be implemented by a navigation system in the prior art, and can realize conventional functions such as route planning, travel time determination, and traffic flow reporting. The electronic control unit (ECU) 502 integrates the functions of the road reminder device 100 as described above, and realizes effective intersection reminders through interaction with the vehicle map navigation system 501. As an example, the ECU 502 can execute a computer program stored in a storage medium to realize the road reminder function. The computer program here may include a time calculation module, a judgment module, an alarm generation module, and optional proximity detection module and threshold determination module. The function and implementation of each module are the same as those of the aforementioned time calculation module 101, judgment module 102, alarm generation module 103, and optional proximity detection module 104 and threshold determination module 105, and will not be described again here.

[0033] The present invention has been shown and described in detail above with reference to the accompanying drawings and preferred embodiments. However, the present invention is not limited to these disclosed embodiments. Those skilled in the art can make any modifications based on the above detailed disclosure, including merging, replacing, adding, and deleting features. All such modifications should be considered to fall within the protection scope defined by the appended claims.

Claims

1. A road warning method, comprising: Obtain the estimated arrival time of the vehicle from the target exit of the currently planned driving route to the destination; Obtain the detour arrival time to the destination by replanning the route when the vehicle misses the target exit and exits from another exit; Determine whether the difference between the detour arrival time and the expected arrival time is greater than the detour time difference threshold; If the difference between the detour arrival time and the expected arrival time is greater than or equal to the detour time difference threshold, a warning signal is generated to indicate the importance of the target exit. The detour time difference threshold is determined for the specific trip, and the road alert method includes: Based on the user's departure location and destination, at least a first driving route with a first estimated travel time, a second driving route with a second estimated travel time, and a third driving route with a third estimated travel time are planned, wherein the second estimated travel time is greater than the first estimated travel time and less than the third estimated travel time. If the first driving route is selected as the currently planned driving route, the detour time difference threshold is set to the difference between the second estimated travel time and the first estimated travel time; otherwise, if the second driving route or the third driving route is selected as the currently planned driving route, the detour time difference threshold is set to the larger of the following time differences: The difference between the second estimated travel time and the first estimated travel time; The difference between the third estimated travel time and the first estimated travel time; and The difference between the third estimated travel time and the second estimated travel time.

2. The road reminder method as claimed in claim 1, wherein the replanned route is at least one route with the shortest arrival time from the target exit location to the destination, assuming that the vehicle misses the target exit on the currently planned driving route.

3. The road warning method as described in claim 1, further comprising: Determine the proximity of the vehicle's current position to the target exit, and when the proximity reaches a predetermined proximity threshold, execute the steps of obtaining the estimated arrival time and the detour arrival time.

4. The road warning method as described in any one of claims 1-3, wherein generating a warning signal to indicate the importance of the target exit includes at least one of the following: Change the background color or display frequency of the vehicle's dashboard; Turn on the turn signal flashing indicator on the target exit side as a warning; Generate video or image prompts on the vehicle's display screen; and Generate a voice prompt indicating the target exit.

5. A road warning device, comprising: The time calculation module is used to obtain the estimated arrival time of a vehicle from the target exit of the currently planned driving route to the destination, and to obtain the detour arrival time of the vehicle to the destination by replanning the route if the vehicle misses the target exit and exits from another exit. The judgment module is used to determine whether the difference between the detour arrival time and the expected arrival time is greater than or equal to the detour time difference threshold. An alarm generation module is used to generate a warning signal to indicate the importance of the target exit if the difference between the detour arrival time and the expected arrival time is greater than or equal to the detour time difference threshold. The threshold determination module is used to determine the detour time difference threshold for the trip, including: Based on the user's departure location and destination, at least a first driving route with a first estimated travel time, a second driving route with a second estimated travel time, and a third driving route with a third estimated travel time are planned, wherein the second estimated travel time is greater than the first estimated travel time and less than the third estimated travel time. If the first driving route is selected as the currently planned driving route, the detour time difference threshold is set to the difference between the second estimated travel time and the first estimated travel time; otherwise, if the second driving route or the third driving route is selected as the currently planned driving route, the detour time difference threshold is set to the larger of the following time differences: The difference between the second estimated travel time and the first estimated travel time; The difference between the third estimated travel time and the first estimated travel time; and The difference between the third estimated travel time and the second estimated travel time.

6. The road warning device as claimed in claim 5, further comprising: The proximity determination module is configured to determine the proximity of the current position of the vehicle in motion to the target exit, and output a proximity indication signal when the proximity reaches a predetermined proximity threshold. The time calculation module performs the operation of obtaining the estimated arrival time and the detour arrival time based on the proximity indication signal.

7. The road warning device of claim 6, wherein the proximity can be expressed as the distance between the current location and the target exit, or the estimated time for the vehicle to travel from the current location to the target exit.

8. The road reminder device as claimed in claim 5, wherein the first driving route, the second driving route, and the third driving route are provided by the vehicle map navigation system based on the user's departure location and the destination.

9. The road warning device as described in any one of claims 5-8, wherein the warning signal is used to trigger one or more of the following events: The in-vehicle map navigation system alerts you to the approaching target exit in a way that differs from conventional alert modes; Change the background color or display frequency of the vehicle's dashboard; Turn on the turn signal flashing indicator on the target exit side as a warning; Generate video or image prompts on the vehicle's display screen; as well as Generate a voice prompt indicating the target exit.

10. An in-vehicle map navigation system, comprising: The navigation module provides navigation data for the vehicle, including planning driving routes and calculating travel time; The road alert module includes: The time calculation module is used to calculate the estimated arrival time of a vehicle from the target exit of the currently planned driving route to the destination, and to estimate the detour arrival time of the vehicle to the destination by replanning the route if the vehicle misses the target exit and exits from another exit. The judgment module is used to determine whether the difference between the detour arrival time and the expected arrival time is greater than the detour time difference threshold, wherein the detour time difference threshold is determined for the trip. An alarm generation module is used to generate a warning signal to indicate the importance of the target exit if the difference between the detour arrival time and the expected arrival time is greater than the detour time difference threshold. The threshold determination module is used to determine the detour time difference threshold for the trip, including: Based on the user's departure location and destination, at least a first driving route with a first estimated travel time, a second driving route with a second estimated travel time, and a third driving route with a third estimated travel time are planned, wherein the second estimated travel time is greater than the first estimated travel time and less than the third estimated travel time. If the first driving route is selected as the currently planned driving route, the detour time difference threshold is set to the difference between the second estimated travel time and the first estimated travel time; otherwise, if the second driving route or the third driving route is selected as the currently planned driving route, the detour time difference threshold is set to the larger of the following time differences: The difference between the second estimated travel time and the first estimated travel time; The difference between the third estimated travel time and the first estimated travel time; and The difference between the third estimated travel time and the second estimated travel time.

11. The vehicle-mounted map navigation system as described in claim 10, wherein the road reminder module further comprises: The proximity determination module is configured to determine the proximity of the current position of the vehicle in motion to the target exit, and output a proximity indication signal when the proximity reaches a predetermined proximity threshold. The time calculation module performs the operation of obtaining the estimated arrival time and the detour arrival time based on the proximity indication signal.

12. The in-vehicle map navigation system of claim 10 or 11, wherein the warning signal is used to trigger an event: The in-vehicle map navigation system alerts you to the approaching target exit in a way that differs from conventional alert modes; Change the background color or display frequency of the vehicle's dashboard; Turn on the turn signal flashing indicator on the target exit side as a warning; Generate video or image prompts on the vehicle's display screen; as well as Generate a voice prompt indicating the target exit.

13. A vehicle driving control device, comprising: In-vehicle map navigation system is used to provide navigation data for vehicles, including planning driving routes and travel time; The electronic control unit is configured to perform the following operations: The vehicle-mounted map navigation system is controlled to provide the estimated arrival time of the vehicle from the target exit of the currently planned driving route to the destination; The vehicle-mounted map navigation system is controlled to provide the detour arrival time to the destination by replanning a route when the vehicle misses the target exit and exits from another exit. Determine whether the difference between the detour arrival time and the expected arrival time is greater than or equal to the detour time difference threshold; If the difference between the detour arrival time and the expected arrival time is greater than or equal to the detour time difference threshold, a warning signal is generated to indicate the importance of the target exit. The detour time difference threshold mentioned above is determined for the trip and specifically includes: Based on the user's departure location and destination, at least a first driving route with a first estimated travel time, a second driving route with a second estimated travel time, and a third driving route with a third estimated travel time are planned, wherein the second estimated travel time is greater than the first estimated travel time and less than the third estimated travel time. If the first driving route is selected as the currently planned driving route, the detour time difference threshold is set to the difference between the second estimated travel time and the first estimated travel time; otherwise, if the second driving route or the third driving route is selected as the currently planned driving route, the detour time difference threshold is set to the larger of the following time differences: The difference between the second estimated travel time and the first estimated travel time; The difference between the third estimated travel time and the first estimated travel time; and The difference between the third estimated travel time and the second estimated travel time.

14. The vehicle driving control device as described in claim 13, wherein the electronic control unit is further configured to: The system obtains the current location of the vehicle and its proximity to the target exit from the in-vehicle map navigation system. When the proximity reaches a proximity threshold, the system controls the in-vehicle map navigation system to provide the estimated arrival time and the detour arrival time.

15. The vehicle driving control device of claim 13 or 14, wherein the warning signal is used to trigger an event: The in-vehicle map navigation system alerts you to the approaching target exit in a way that differs from conventional alert modes; Change the background color or display frequency of the vehicle's dashboard; Turn on the turn signal flashing indicator on the target exit side as a warning; Generate video or image prompts on the vehicle's display screen; as well as Generate a voice prompt indicating the target exit.

16. A machine-readable storage medium having instructions stored thereon, which, when executed by a machine, cause the machine to perform the method of any one of claims 1-4.

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