Classifications

• • G—PHYSICS
  • G08—SIGNALLING
  • G08G—TRAFFIC CONTROL SYSTEMS
  • G08G1/00—Traffic control systems for road vehicles
  • G08G1/09—Arrangements for giving variable traffic instructions
  • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
  • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
  • G08G1/096766—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission
  • G08G1/096775—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission where the origin of the information is a central station
• • G—PHYSICS
  • G08—SIGNALLING
  • G08G—TRAFFIC CONTROL SYSTEMS
  • G08G1/00—Traffic control systems for road vehicles
  • G08G1/123—Traffic control systems for road vehicles indicating the position of vehicles, e.g. scheduled vehicles; Managing passenger vehicles circulating according to a fixed timetable, e.g. buses, trains, trams
  • G08G1/127—Traffic control systems for road vehicles indicating the position of vehicles, e.g. scheduled vehicles; Managing passenger vehicles circulating according to a fixed timetable, e.g. buses, trains, trams to a central station ; Indicators in a central station
• • G—PHYSICS
  • G08—SIGNALLING
  • G08G—TRAFFIC CONTROL SYSTEMS
  • G08G1/00—Traffic control systems for road vehicles
  • G08G1/01—Detecting movement of traffic to be counted or controlled
  • G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
  • G08G1/0125—Traffic data processing
  • G08G1/0129—Traffic data processing for creating historical data or processing based on historical data
• • G—PHYSICS
  • G08—SIGNALLING
  • G08G—TRAFFIC CONTROL SYSTEMS
  • G08G1/00—Traffic control systems for road vehicles
  • G08G1/01—Detecting movement of traffic to be counted or controlled
  • G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
  • G08G1/0125—Traffic data processing
  • G08G1/0133—Traffic data processing for classifying traffic situation
• • G—PHYSICS
  • G08—SIGNALLING
  • G08G—TRAFFIC CONTROL SYSTEMS
  • G08G1/00—Traffic control systems for road vehicles
  • G08G1/09—Arrangements for giving variable traffic instructions
  • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
  • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
  • G08G1/096708—Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control
  • G08G1/096716—Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control where the received information does not generate an automatic action on the vehicle control
• • G—PHYSICS
  • G08—SIGNALLING
  • G08G—TRAFFIC CONTROL SYSTEMS
  • G08G1/00—Traffic control systems for road vehicles
  • G08G1/09—Arrangements for giving variable traffic instructions
  • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
  • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
  • G08G1/096708—Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control
  • G08G1/096725—Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control where the received information generates an automatic action on the vehicle control
• • G—PHYSICS
  • G08—SIGNALLING
  • G08G—TRAFFIC CONTROL SYSTEMS
  • G08G1/00—Traffic control systems for road vehicles
  • G08G1/09—Arrangements for giving variable traffic instructions
  • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
  • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
  • G08G1/096733—Systems involving transmission of highway information, e.g. weather, speed limits where a selection of the information might take place
  • G08G1/096741—Systems involving transmission of highway information, e.g. weather, speed limits where a selection of the information might take place where the source of the transmitted information selects which information to transmit to each vehicle

Definitions

• the present invention relates to methods, apparatus, and a computer-readable storage medium having instructions for determining applicable traffic rules for a motor vehicle.
• the invention further relates to a motor vehicle in which a
• Inventive method or apparatus according to the invention can be used.
• Information can also be used by a variety of control devices in the vehicle, for example, to automatically control the vehicle speed or warning of unauthorized overtaking maneuvers.
• control devices for example, to automatically control the vehicle speed or warning of unauthorized overtaking maneuvers.
• the reliable availability of such information is essential.
• a first approach is based on the use of navigation maps in which traffic signs are noted.
• a second approach is to detect traffic signs using camera systems.
• DE 10 2013 013 799 A1 describes an assistance system that assists a vehicle driver in an overtaking procedure by using the vehicle
• the determination of the remaining overtaking distance can by means of
• Traffic sign recognition or GPS-based map material done.
• country-specific traffic signs database with at least partially country-specific classification characteristics or at least partially
• the country-specific traffic sign database is then preset for further traffic sign detections, for which in the
• Traffic sign recognition at least a sufficient quality has been determined.
• Traffic sign information known.
• traffic sign data is stored in the vehicle.
• stored traffic sign data is assigned to a current position of a vehicle.
• a traffic sign data associated with the current position of the vehicle is assigned to a traffic sign data associated with the current position of the vehicle.
• the traffic sign data can be any traffic sign information provided.
• the traffic sign data can be any traffic sign information provided.
• the traffic sign data can be any traffic sign information provided.
• the traffic sign data can be any traffic sign information provided.
• a disadvantage with camera-based solutions is their limited range, i. a predictive detection of traffic signs is only possible to a limited extent.
• the reliability of detection decreases with increasing vehicle speed.
• a disadvantage of solutions based on navigation maps is that these maps must always be up-to-date, so the maps must be continuously updated, for example by online updates.
• the required cards cause license costs and are usually only sold together with a navigation function. The user incurs additional costs.
• a method for determining applicable traffic rules for a motor vehicle comprises the steps of:
• Motor vehicle to the back end cyclically or in response to information on a validity of the traffic rules contained in the information on the prevailing at the position of the motor vehicle traffic rules takes place.
• a computer-readable storage medium includes instructions that, when executed by a computer, cause the computer to perform the following steps to determine applicable traffic rules for a motor vehicle:
• Motor vehicle to the back end cyclically or in response to information on a validity of the traffic rules contained in the information on the prevailing at the position of the motor vehicle traffic rules takes place.
• a device for determining valid traffic rules for a motor vehicle comprises:
• a transmission device for transmitting at least one position and a direction of movement of the motor vehicle to a backend and for receiving information about traffic regulations which are applicable at the position of the motor vehicle;
• the transmission device is set up, the transmission of at least one position and a movement direction of the motor vehicle to the backend cyclically or in
• Traffic rules can optionally be cyclic, i. in regular time or space intervals, or depending on information on a validity of the traffic rules. In this way, only manageable amounts of data have to be transmitted, so that the data transmission between motor vehicle and backend is very efficient.
• a history of positions of the motor vehicle is transmitted to the backend.
• the history of positions i. a trace from past waypoints is extremely helpful for correctly assigning the vehicle position to a road, especially to the correct lane in the case of multi-lane roads.
• a method for determining applicable traffic rules for a motor vehicle comprises the steps of:
• the information relating to the traffic rules applicable at the position of the motor vehicle includes information on the validity of the traffic rules.
• a computer-readable storage medium includes instructions that, when executed by a computer, cause the computer to perform the following steps to determine applicable traffic rules for a motor vehicle: - Receiving at least one position and a direction of movement of the motor vehicle;
• the information relating to the traffic rules applicable at the position of the motor vehicle includes information on the validity of the traffic rules.
• a device for determining valid traffic rules for a motor vehicle comprises:
• a transmission device for receiving at least one position and a direction of movement of the motor vehicle and for transmitting information on applicable at the position of the motor vehicle traffic rules to the motor vehicle;
• Data volume to be kept low, information on the validity of the traffic rules are also determined by the backend and transmitted to the motor vehicle.
• a query of the traffic rules by the motor vehicle can then take place based on the validity, so that no more queries than necessary received at the backend.
• the determination of the information on the traffic rules applicable at the position of the motor vehicle comprises the steps:
• the desired information on the traffic rules can be taken directly from the map data.
• the route can be used to check possible routes for changes in the traffic rules. This makes it easy to determine up to which future vehicle positions no further query the
• the validity information includes the
• Traffic rules include an indicator indicating that the position of the motor vehicle is in or adjacent to an intersection area. For transmitting position and direction of movement of the motor vehicle to the backend is at
• Presence of the indicator preferably used an increased cycle frequency. This approach increases the reliability of the described solutions in intersection areas.
• the information on the validity of the traffic rules describes a spatial validity, in particular a spatial validity dependent on a travel route.
• the transmission of at least one position and a movement direction of the motor vehicle to the backend is performed again in this case at the expiration of the spatial validity.
• the spatial validity can be defined for example by the minimum distance up to a change of the traffic rules, but also several distances can be transmitted for different possible routes.
• the information about the traffic rules that apply at the position of the motor vehicle include detailed information about at least one intersection.
• detail information e.g. an intersection model or an intersection network
• a certain look-ahead can be achieved in the case of latencies in the request to the backend, so that the reliability of the method is further increased.
• the traffic rules applicable at the position of the motor vehicle describe a speed limit, a right of way or a prohibition on passing. This covers typical cases of traffic rules that go beyond longer road sections are valid and are therefore particularly suitable for the application of the solutions described.
• a method according to the invention or a device according to the invention are used in a vehicle, in particular a motor vehicle.
• Fig. 1 shows schematically a method for determining applicable traffic rules for a motor vehicle from the perspective of the motor vehicle
• Fig. 2 shows a first embodiment of a device for determining applicable
• Fig. 3 shows a second embodiment of a device for determining
• Fig. 4 schematically illustrates a motor vehicle in which a solution according to the invention is realized
• FIG. 5 schematically shows a method for determining valid traffic rules of a motor vehicle from the perspective of a backend
• FIG. 6 shows further details for determining the indications of the position at the
• Fig. 7 shows a first embodiment of a device for determining applicable
• Traffic rules for a motor vehicle that may be installed in a backend
• Fig. 8 shows a second embodiment of a device for determining
• Fig. 10 illustrates two advantageous algorithms that may be implemented in the system of Fig. 9;
• Fig. 1 1 shows a crossing model, which in the context of information to applicable
• Traffic rules can be transmitted to a motor vehicle
• Fig. 12 illustrates a first iteration step of a determination of a
• Fig. 13 illustrates a second iteration step of determining a
• FIG. 14 illustrates an end result of determining a validity distance of a
• Fig. 1 shows schematically a method for determining applicable traffic rules for a motor vehicle from the perspective of the motor vehicle. First, position and
• Direction of movement of the motor vehicle 10 determined position and direction of movement of the motor vehicle are then transmitted by a transmission device of the motor vehicle to a backend 1 1. It can be provided to transmit a history of positions of the motor vehicle to the backend. Finally, in response to the information sent to the backend, information is given about the position of
• Motor vehicle traffic rules received by the transmission device 12 for example, information on a speed limit, a right of way or a no-overtaking.
• the transmission 1 1 of the position and direction of movement of the motor vehicle to the backend takes place cyclically or in dependence on information on a validity of the traffic rules in the information on the at the position of Motor vehicle traffic rules are included.
• the validity information may include, for example, an indicator indicating that the position of the motor vehicle is in or adjacent an intersection area.
• the query of the valid traffic rules at the backend can then take place in the presence of the indicator with an increased cycle frequency.
• the validity information may describe a spatial validity, in particular a spatial validity dependent on a travel route.
• the query of the applicable traffic rules at the backend is preferably carried out again in this case only at the expiration of spatial validity.
• Traffic rules include detailed information about intersections.
• FIG. 2 shows a simplified schematic representation of a first embodiment of a device 20 for determining applicable traffic rules for a motor vehicle, which may be installed in a motor vehicle.
• the device 20 has an input 21 for receiving information about the position and direction of movement of the motor vehicle, for example from a navigation system, or data that allow a determination of position and direction of movement of the motor vehicle.
• a tracking unit 22 extracts or detects the position and direction of movement of the motor vehicle from the received data and selects those data which are to be transmitted to a backend.
• a transmission device 23 transmits the selected data, ie position and direction of movement of the motor vehicle, to the backend. It can be provided that the transmission device 23 transmits a history of positions of the motor vehicle to the backend.
• the transmission device 23 receives from the backend information on applicable at the position of the motor vehicle traffic rules, such as information on a speed limit, a right of way or a no-overtaking.
• the transmission device 23 is set up to carry out the transmission of the position and direction of movement of the motor vehicle to the backend cyclically or as a function of information about a validity of the traffic rules contained in the information on the traffic rules applicable at the position of the motor vehicle.
• the validity information may include, for example, an indicator indicating that the position of the motor vehicle is in or adjacent an intersection area. The query of the valid traffic rules at the backend can then take place in the presence of the indicator with an increased cycle frequency.
• the validity information may describe a spatial validity, in particular a spatial validity dependent on a travel route.
• the query of the applicable traffic rules at the backend is preferably carried out again in this case only at the expiration of spatial validity.
• the information on the at the Position of the motor vehicle traffic rules detailed information on intersections.
• a data processing unit 24 evaluates the received information about the traffic rules that apply at the position of the motor vehicle.
• Data processing unit 24 generated data are preferably provided via an output 26 of the device 20 for further use.
• the tracking unit 22, the transmission device 23 and the data processing unit 24 can be controlled by a control unit 25. Via a user interface 28 can
• the data obtained in the device 20 can be stored in a memory 27 of the device 20, for example, for later evaluation or for use by the components of the device 20.
• the tracking unit 22, the transmission device 23, the data processing unit 24 and the control unit 25th can be implemented as dedicated hardware, such as integrated circuits. Of course, they may also be partially or fully combined or implemented as software running on a suitable processor, such as a GPU.
• the input 21 and the output 26 may be implemented as separate interfaces or as a combined bidirectional interface.
• FIG. 3 shows a simplified schematic representation of a second embodiment of a device 30 for determining applicable traffic regulations for a motor vehicle which may be installed in a motor vehicle.
• the device 30 has a processor 32 and a memory 31.
• device 30 is a computer or controller.
• the memory 31 are stored instructions that the
• the device has an input 33 for receiving information, for example data that has been detected by a sensor system of the motor vehicle.
• Data generated by the processor 32 is provided via an output 34.
• they can be stored in the memory 31.
• the input 33 and the output 34 can become a bidirectional interface
• the processor 32 may include one or more processing units, such as microprocessors, digital signal processors, or combinations thereof.
• the memories 27, 31 of the described embodiments can have both volatile and non-volatile memory areas and a wide variety of memory devices and
• Storage media include, for example, hard disks, optical storage media or semiconductor memory.
• Fig. 4 schematically illustrates a motor vehicle 40 in which a solution according to the invention is realized.
• the motor vehicle 40 has inter alia a navigation system 41 and an environment sensor system 42, for example a camera system.
• the data acquired by the navigation system 41 and, if appropriate, the surroundings sensor 42 are transmitted via a network 43 to a device 20 for determining applicable traffic regulations for the motor vehicle.
• they can be stored in a memory 44 of the motor vehicle 40. If necessary, the data from the device 20 by means of a
• Communication unit 45 transmitted to a backend for evaluation.
• the data transmitted by the backend in response to the data transmitted to the traffic rules applicable to the motor vehicle are communicated to the driver by means of a user interface 47, for example an infotainment system with a display device.
• a user interface 47 for example an infotainment system with a display device.
• infotainment system with a display device.
• they can be made available to a driver assistance system 46 of the motor vehicle 40, for example for the automatic regulation of the vehicle speed.
• FIG. 5 schematically shows a method for determining valid traffic rules for a motor vehicle from the perspective of a backend.
• a first step at least one position and one direction of movement of the motor vehicle are received 50.
• information about traffic rules applicable to the position of the motor vehicle is then determined 51, for example information about one
• the information on the traffic rules that apply at the position of the motor vehicle include information on the validity of the traffic rules.
• the validity information may include, for example, an indicator indicating that the position of the motor vehicle is in or adjacent an intersection area.
• the validity information may describe a spatial validity, in particular a spatial validity dependent on a travel route.
• the information on the traffic rules applicable at the position of the motor vehicle may include detailed information about intersections. The information on the traffic rules applicable at the position of the motor vehicle are finally transmitted to the motor vehicle 52.
• FIG. 6 shows further details for determining the indications of the position at the
• Motor vehicle traffic rules In a first step, an assignment 60 of the Position of the motor vehicle to a road in a road network. Subsequently, the traffic rules are determined 61, which apply at the position of the motor vehicle for the road. In addition, at least one validity distance is determined 62, ie a distance in
• FIG. 7 shows a simplified schematic representation of a first embodiment of a device 70 for determining valid traffic rules for a motor vehicle which may be installed in a backend.
• the device 70 has a first interface 71, via which a transmission device 72 can receive information about at least one position and one direction of movement of the motor vehicle. Via the first interface, the transmission device 72 can also transmit information about traffic regulations applicable at the position of the motor vehicle to the motor vehicle, for example information about a speed limit, a right of way or an overtaking prohibition.
• a location unit 73 locates the motor vehicle in a map.
• the card may be provided from an external database via a second interface 76.
• a computing unit 74 determines the desired information about the traffic rules that apply at the position of the motor vehicle. The arithmetic unit 74 is set up, the information on the applicable at the position of the motor vehicle
• the validity information may include, for example, an indicator indicating that the position of the motor vehicle is in or adjacent to a vehicle
• the validity information may describe a spatial validity, in particular a spatial validity dependent on a travel route.
• the information on the traffic rules applicable at the position of the motor vehicle may include detailed information about intersections.
• the transmission device 72, the location unit 73 and the arithmetic unit 74 can be controlled by a control unit 75. If necessary, settings of the transmission device 72, the location unit 73, the arithmetic unit 74 or the control unit 75 can be changed via a user interface 78.
• the data accumulating in the device 70 can thereby be stored in a memory 77 of the device 70, for example for later evaluation or for use by the components of the device 70.
• the transmission device 72, the location unit 73, the arithmetic unit 74 and the control unit 75 can be implemented as dedicated hardware, such as integrated circuits. Of course, they may also be partially or fully combined or implemented as software running on a suitable processor, such as a GPU.
• the first interface 71 and the second interface 76 can be implemented as separate interfaces or as a combined interface.
• FIG. 8 shows a simplified schematic representation of a second embodiment of a device 80 for determining valid traffic rules for a motor vehicle which may be installed in a backend.
• the device 80 includes a processor 82 and a memory 81.
• device 80 is a computer or workstation.
• instructions are stored, which cause the device 80 when executed by the processor 82, the steps according to one of
• the instructions stored in the memory 81 thus embody a program which can be executed by the processor 82 and implements the method according to the invention.
• the device has an entrance 83 to the
• Receiving information for example, from a data packet from a
• Data generated by the processor 82 is provided via an output 84.
• they can be stored in memory 81.
• the input 83 and the output 84 can become a bidirectional interface
• the processor 82 may include one or more processing units, such as microprocessors, digital signal processors, or combinations thereof.
• the memories 77, 81 of the described embodiments can have both volatile and non-volatile memory areas and a wide variety of memory devices and
• Storage media include, for example, hard disks, optical storage media or semiconductor memory.
• a speed limit is determined for the vehicle.
• the same principle can also be used, for example, for right-of-way regulations or overtaking bans.
• no currently valid speed is transmitted, but the status of the road, for example parent or child, and the validity distance.
• FIG. 9 illustrates a system for determining applicable traffic rules for a motor vehicle 40.
• the system includes the motor vehicle 40 and a back end 90.
• the motor vehicle 40 includes a navigation system 41, a driver assistance system 46, and a user interface 47 on.
• the backend includes at least one device 70 for determining applicable ones
• Traffic rules and a database 91 with map data and traffic control information may be in NDS format, for example (NDS: Navigation Data Standard, Navigation Data Standard).
• NDS Navigation Data Standard
• the motor vehicle 40 sends its current position with a trace, i. with at least one waypoint of the past, and its direction to the backend 90.
• This data may be provided by the navigation system 41, for example.
• the backend 90 uses this information to associate the motor vehicle 40 with a road.
• the device 70 for determining applicable traffic rules provided. Based on the assignment, the currently valid speed limit for the motor vehicle 40 is determined and transmitted to the motor vehicle 40. In addition, a validity distance for the speed limit and at least one subsequent speed limit can also be determined and transmitted. This can be done in particular taking into account possible route decisions.
• Device 20 from the received data determined current speed limit can be displayed on a display of the user interface 47.
• Speed limits are provided to the driver assistance system 46. If the subsequent speed limits are route-dependent, information on the route selected in each case can be supplied by the navigation system 41 as needed. In addition, the navigation system 41 can be instructed to
• FIG. 10 illustrates two advantageous algorithms 92, 93 that may be implemented in the system of FIG. 9.
• a first algorithm 92 is implemented in the database 91. However, it may also be performed by the device 70 for determining applicable traffic rules or by a dedicated component of the backend 90. In the algorithm
• 92 is a search algorithm. This determines the applicable at the position of the motor vehicle 40 speed limit. In addition, the
• Another algorithm 93 is in the arranged in the motor vehicle 40 device 20 for determining applicable traffic rules implemented.
• This algorithm 93 can alternatively be executed by a dedicated component of the motor vehicle 40.
• the algorithm performs the selection of those past waypoints to be transmitted to the backend 90.
• the past positions are stored in a ring memory, so that the newest waypoint always the oldest already
• Steering angle changes such as a curve entrance, a vertex or a
• Corner exit It is also possible to transmit the path curvature, which can be calculated from the steering angle, for each waypoint.
• the recognized lane markings (dashed, solid, double line, none) can also be transmitted. With this information, the assignment can be further improved.
• Querying the applicable traffic rules at the backend 90 can be accomplished in several ways, some of which are explained below.
• the vehicle 40 cyclically asks the backend 90 for the current speed limit.
• the cyclic polling can take place at a constant frequency, for example at 1 Hz, or at a constant distance, for example every 0.5 m. This ensures that the vehicle is always informed about the current speed limit, but causes a not insignificant
• the vehicle 40 also cyclically asks the backend 90. However, when the vehicle 40 is in an intersection or near an intersection, the back end 90 sends an indicator indicative of an intersection in addition to the speed limit. In this case, the vehicle 40 will ask the backend 90 for higher frequency until the indicator is reset.
• This variant increases the reliability in crossing areas, but causes a slightly larger volume of data than the first implementation variant. In addition, a nearly permanent data connection is needed here as well.
• the vehicle 40 initially asks the backend 90 for the current speed limit.
• the backend 90 uses the search algorithm 92 to determine both the current speed limit and the minimum distance up to a change in speed limit. Both information is transmitted to the vehicle 40.
• the vehicle 40 tracks the distance traveled, for example, using vehicle sensors, and again asks the back-end 90 when the transmitted minimum distance is reached.
• Speed limit from. This variant manages with a very small number of queries, so that the resulting data volume is very low. In addition, no permanent data connection is necessary. Instead of the minimum distance up to a change of the speed limit also several distances for different possible routes can be transmitted. In other words, the shortest distance to a change in the speed limit is stored under the direction condition of the first encountered intersection. To give an example, when the vehicle 40 turns left at the first intersection in 500 m, the next change is in one
• Vehicle 40 turns right at the first intersection in 500 m, the next change is at a distance of 612 m. In this case, the vehicle 40 monitors not only the distance traveled but also the selected route.
• the backend 90 transmits in addition to the current one
• Speed limit a simple crossing model.
• An example of such a crossing model is shown in FIG. 11.
• the intersection is represented by a circle representing the intersection.
• the outgoing crossing arms are represented by their position on the annulus and by the direction of the arm.
• the position on the annulus is determined by the position in degrees
• Cross point is indicated, while for the direction of the arm the direction in degrees is used.
• the vehicle 40 can decide from its own direction, which crossing arm is driven.
• An alternative intersection model uses GPS points to represent the intersection arms. By comparing the vehicle position with the GPS points, the vehicle 40 may determine belonging to a crossing arm.
• the backend 90 is an intersection network for transmitted a defined radius. The vehicle 40 then locates independently within this network and determines therefrom the current speed limit. With the help of the intersection models or the intersection network can be achieved in the case of latencies in the request to the backend a certain perspective, so that the
• Fig. 12 illustrates a first iteration step of a determination of a
• Validity distance of a speed limit Shown is a section of a road network, where the roads are represented by continuous and dashed lines. The type of dashes represents the associated
• Searches carried out in the road network correspond to a tree search.
• the road network splits in many directions. It will be the shortest path to one
• the vehicle is at a position P represented by a circle.
• the arrow in the circle represents the
• Another circle VP illustrates a previous position of the vehicle.
• the vehicle is on a road section between two intersections "1" and "2", which may be possible future positions ZP of the vehicle.
• Speed limit on this section of road is 30 km / h.
• the distance to the next intersection "1" in the direction of travel is first determined, and the distance to the next intersection "2" is determined counter to the direction of travel, assuming a turning maneuver at the next intersection "1" in the direction of travel.
• the distance to the intersection "1" in the example is 150 m, the distance to the intersection "2" 450 m.
• the speed limit does not change.
• the minimum distance up to a change in the speed limit is therefore greater than 150 m in any case.
• Fig. 13 illustrates a second iteration step of determining a
• Speed limit is found will continue the search for other intersections where the speed limit could change. Starting from the intersections found in the first iteration, five more intersections "1" to "5" can be achieved. Already used road sections are ignored in the search, if the speed limit applies to both directions and the current distance is shorter than the distance already used.
• the distance to the intersections "1", “2” and “5" is 200 m, the distance to the intersection "3" 250 m, the distance to the intersection "4" 270 m
• the minimum distance up to a change of the speed limit is thereby in any case larger than 350 m, ie as the
• FIG. 14 illustrates an end result of determining a validity distance of a

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• 2017
  • 2017-05-24 DE DE102017208854.0A patent/DE102017208854A1/de active Granted
• 2018
  • 2018-04-26 US US16/611,320 patent/US11538341B2/en active Active
  • 2018-04-26 WO PCT/EP2018/060649 patent/WO2018215156A1/de active Application Filing
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