JPH09126792A - Car navigation equipment - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a car navigation device that prevents traffic violations such as one-way traffic, no entry, and no left or right turns. SOLUTION: Based on the designated direction from the direction indicator of the own vehicle by the designated direction reading circuit 15, the intersection code and the road number updated in the RAM 17, the intersection code of the planned right / left turn intersection and the planned left / right turn intersection. It is possible to specify the road number of the planned road to be approached before entering the planned road, based on the intersection code of the planned left / right turn intersection and the road number of the planned road based on the planned left / right turn intersection, By reading the traffic rules of the planned approach road from the intersection data 50, it is determined whether the vehicle is a traffic violation if the vehicle enters the planned road. If the vehicle enters the planned road, it is a traffic violation. At this time, a warning sound is generated by the warning sound generation device 21 to notify the driver of that fact before the vehicle enters the planned road.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a car navigation system for preventing traffic violations such as one-way traffic, entry prohibition, and right / left turn prohibition.

[0002]

2. Description of the Related Art Conventionally, when driving a car, it is necessary to comply with traffic regulations such as one-way traffic, no entry, and no left or right turns.
It has been done by the driver himself checking the traffic regulation with signs etc.

However, since the places where the signs are installed vary depending on the road conditions, the driver often overlooks the signs when entering a road on which he or she is traveling for the first time. , Was one of the causes of frequent traffic accidents. Therefore, if a device is developed that informs the driver that a traffic violation will occur if he / she enters the road before entering the road (hereinafter referred to as “traffic violation prevention notification”), problems will occur. It becomes possible to solve it.

From this point of view, a vehicle position detection function for measuring the current position of a vehicle driven by a driver (hereinafter referred to as "vehicle") and traffic regulation such as one-way traffic, no entry, no turn left and right, etc. It is effective if the car navigation device having a route calculation function for automatically searching for a traveling route to a destination can be improved in consideration of the data regarding
Since the driving route can be changed at any time according to the judgment of the driver, it is difficult to identify the road to be approached (hereinafter referred to as the "road to be approached") before entering the car navigation system. It was not possible to issue a "traffic violation prevention notice".

Therefore, the present invention has been made in order to solve the above-mentioned problems, and by reading the pointing direction from the turn indicator of the own vehicle, it is specified before entering the planned road, and " It is an object of the present invention to provide a car navigation device that can prevent traffic violations such as one-way traffic, entry prohibition, right turn and left turn prohibition, etc. by enabling "traffic violation prevention notification".

[0005]

In order to achieve this object, a car navigation system of the present invention obtains the current position and traveling direction of the own vehicle, and on the map displayed on the display device based on the map information, A car navigation device for displaying the current position, wherein the traffic regulation storage means stores the traffic regulation of the roads divided by the intersections described in the map for each of the intersections corresponding to the roads forming the intersections. And a designated direction reading means for reading the designated direction of the direction indicator of the own vehicle, and a warning means for warning the driver of the own vehicle. When the designated direction reading means reads the designated direction, the present Based on the position, the driving direction, the map information, and the designated direction, the planned right / left turn intersection at which the vehicle is to make a right turn or a left turn is specified, and the designated direction and the right / left turn forecast are specified. On the basis of the intersection, the traffic regulation corresponding to the planned access road where the own vehicle is scheduled to enter is read, and if the own vehicle enters the planned entry road, it is determined whether there is a traffic violation, If it is determined that the driver is in violation, the warning means warns the driver.

[0006] Further, an intersection code that identifies the intersection, a road number that identifies one of the roads that form the intersection, and each time the vehicle passes through the intersection, it corresponds to the intersection that has passed. The map information and the designated direction, comprising: the intersection code; and storage means for updating and storing the road number corresponding to the road on which the own vehicle is traveling and which constitutes the intersection that has passed. On the basis of the intersection code and the road number stored in the front storage means, the intersection code corresponding to the planned right / left turn intersection and the road number corresponding to the planned approach road are specified, and the intersection code and It is characterized in that the traffic regulation corresponding to the planned road is read based on the road number. Further, the traffic regulation is characterized in that entry is prohibited, one-way traffic is prohibited, and right and left are prohibited.

In the car navigation system of the present invention having such a configuration, the road on which the vehicle is traveling (hereinafter referred to as "traveling road") is grasped at any time from the current position and map information, and the driver When the driver operates the turn indicator of the vehicle, the designated direction reading means reads the designated direction designated by the direction indicator. Then, when traveling on the traveling road from the current position toward the traveling direction, the closest intersection to make a right turn or a left turn in the designated direction is determined as the planned right / left turn intersection from the current position, the traveling direction, the map information and the designated direction. Identify.
The planned right / left turn intersection is an intersection where the vehicle turns right or left when entering the planned road.

[0008] Here, the right-and-left turn-scheduled intersection is specified when the traffic regulation for the planned approach road is prohibition of entry, one-way traffic, right-left turn prohibition, etc. This is because if the intersection is different, the determination as to whether or not it is a traffic violation may be different, and in order to make such a determination accurately, it is necessary to specify the planned right / left turn intersection. Further, in order to prepare for such a case, the traffic regulation storing means in which the traffic regulation is stored has the traffic regulation for the roads constituting the intersection (hereinafter referred to as “composition road”) corresponding to each of the constitution roads. It is contained.

After the planned left / right turn intersection is specified, the planned roads to be approached are specified from the designated roads from the constituent roads of the planned right / left turn intersections so that the constituent roads of the planned right / left turn intersections are stored in the traffic regulation storage means. From the corresponding traffic regulations, read the traffic regulations that correspond to the planned road, determine if the vehicle enters the planned road, and determine if it is a traffic violation. Warns the driver by warning means and informs the driver that the vehicle is a traffic offense if it enters the planned road, before the vehicle enters the planned road, one-way, no entry Prevent traffic violations such as prohibiting right and left turns.

Further, in the case where a storage means for storing an intersection code for specifying an intersection and a road number for specifying one of the constituent roads of the intersection is provided, the vehicle passes each time the vehicle passes through the intersection. Intersection code corresponding to the intersection,
By updating and storing the road number corresponding to the road on which the vehicle is traveling (related to the intersection that has passed), the traveling road is updated from the intersection code and the road number stored in the storage means. To understand. When the driver actuates the direction indicator of the vehicle in the same manner as described above, the designated direction reading means reads the designated direction designated by the direction indicator. Then, when the vehicle travels on the road from the current position in the traveling direction, the intersection closest to turning right or left in the designated direction is updated in the map information, the designated direction, and the storage means, and the stored intersection code and road are stored. From the number, specify the intersection as a planned right / left turn.

After the intersection code corresponding to the planned right / left turn intersection is specified, the road number corresponding to the planned road to be approached from the constituent roads of the planned right / left turn intersection is specified from the designated direction to be stored in the traffic regulation storage means. From the traffic regulations corresponding to the roads that make up the planned right / left turn intersection, read the traffic regulations for the planned approach road based on the intersection code corresponding to the planned right / left turn intersection and the road number corresponding to the planned approach road. If the vehicle enters the planned access road, it is judged whether it is a traffic violation. If it is judged that the traffic is a traffic violation, the warning means is used to warn the driver and the vehicle enters the planned road. If the vehicle enters, the driver is informed that the vehicle is a traffic violation before entering the planned access road, and traffic violations such as one-way traffic, no entry, and no left or right turn are prevented.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION A car navigation system according to an embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a block diagram of the car navigation device 1. The car navigation device 1 includes a CPU 10 that is a control unit, a position recognition unit 12 that acquires a current position, a gyro sensor 13 that is a direction detection unit that acquires a traveling direction, and a designated direction reading circuit 15 that is a designated direction reading unit. It has a RAM 17 as a storage means, a hard disk device 18 as a traffic regulation storage means, a display device 20 for displaying a map, and a warning sound generation device 21 as a warning means.

The CPU 10 is a car navigation device 1.
The control program stored in the IC card 30 is read via the IC card device 16, and traffic violation prevention notification processing and update processing, which will be described later, are executed. The position recognition unit 12 recognizes the current position of the own vehicle as latitude and longitude based on the radio waves from the GPS satellites received by the antenna 11. Also, CP
The U10 includes a gyro sensor 13 that acquires the traveling direction of the vehicle and a vehicle speed sensor 14 that measures the traveling distance of the vehicle.
Are connected to each other, and it is possible to determine the current position of the vehicle in a tunnel where the radio waves from the GPS satellites cannot be received, an underpass, a high-rise building street, or the like.

The designated direction reading circuit 15 reads out the designated direction designated by the direction indicator of the vehicle. The right and left direction indicator lamps may blink simultaneously (emergency warning display), so in order to accurately read the designated direction designated by the direction indicator, the direction indicator lamp The designated direction is read not by blinking but by the action of the direction indicator lever.

The RAM 17 is used as a work area or the like when the CPU 10 executes the control program, and includes an intersection code storage area 22 for storing an intersection code and a road number storage area 23 for storing a road number. have. Here, the intersection code is
This is to specify all the intersections described on the map displayed on the display device 20.

The road number identifies one of the roads constituting the intersection, and is assigned to the road constituting the intersection according to a certain rule. In the embodiment of the present invention, a certain rule is that "road numbers are sequentially added from 1 in the counterclockwise direction from the north direction". Specifically, FIG.
Regarding the intersection 100 shown in the road map 70 (the north side is the upper side of the drawing), the road number of the road 80 is “1”, the road number of the road 81 is “2”, and the road number of the road 82 is It is “3” and the road number of the road 83 is “4”. Similarly, regarding the intersection 101, the road 84
, The road number of the road 85 is “2”, and the road number of the road 80 is “3”. In this way, since the road number is attached to each intersection,
Even if the road number is for the same road 80, the intersection 10
The road number based on 0 is “1”, the road number based on the intersection 101 is “3”, and the road number is different if the reference intersection is different.

In the RAM 17 according to the present embodiment, the intersection code stored in the intersection code storage area 22 and the road number stored in the road number storage area 23 are updated according to the update processing flowchart shown in FIG. ing. In step (hereinafter, referred to as “S”) 11, it is determined whether or not the vehicle has passed through the intersection based on the map information 40 and the current position acquired by the position recognition unit 12 and the like. When passing an intersection (S11: Ye
In s), the process proceeds to S12, but if the vehicle has not passed the intersection (S11: No), the process returns to S11 and waits until the own vehicle passes the intersection.

A detailed description will be given below with reference to the road map 70 shown in FIG. If the own vehicle passes through the intersection 100, the intersection code stored in the intersection code storage area 22 in S12 is the intersection code 10 regardless of whether the own vehicle goes straight ahead, makes a right turn, or makes a left turn.
The intersection code corresponding to 0 is updated. Next S1
At 3, the road number after the vehicle has passed the intersection 100 is updated to the road number based on the intersection 100. At this time, since the traveling road differs depending on the state of the vehicle passing straight through the intersection 100, turning right, and turning left,
The road number to be updated is also different.

The road number is "1" when the vehicle is straight ahead at the intersection 100, the road number is "4" when the vehicle turns right at the intersection 100, and the vehicle number turns left at the intersection 100. The road number is "2". Then, after updating the road number, the process returns to S11, and waits until the own vehicle passes the next intersection. As described above, by referring to the intersection code stored in the intersection code storage area 22 and the road number stored in the road number storage area 23, the traveling road can be grasped at any time.

The hard disk device 18 includes a display device 20.
Information 40 about the map displayed on the screen and intersection data 50 including the traffic rules of the roads described in the map.
Etc. are stored in the hard disk 31. here,
The intersection data 50 will be described with reference to FIG. FIG. 2 is a diagram showing the intersection data 50. The intersection data 50 exists for all the intersections shown on the map displayed on the display device 20. The intersection data 50 includes an intersection code 51 that identifies the intersection, an intersection latitude 52, an intersection longitude 53, and first road data 54 and second road data 55 regarding the constituent roads.

There are as many road data as the first road data 54 and the second road data 55 as the number of constituent roads.
The intersection data 50 of the intersection consisting of two constituent roads,
In addition to the first road data 54 and the second road data 55, the third road data and the fourth road data (not shown) are included. In the intersection data 50, the road data such as the first road data 54 and the second road data 55 is stored in the order of the road numbers given to the constituent roads based on the intersection specified by the intersection code 51. Correspondingly, for example, the first road data 54 contains data on the constituent road of the road number “1”, and the second road data 55 contains data on the constituent road of the road number “2”. ing.

The first road data 54 and the second road data 55
Each road data such as is composed of a sign code 60, a right turn intersection code 61A, a right turn road number 61B, a left turn intersection code 62A, and a right turn road number 62B. Here, a specific description will be given using the road map 70 of FIG. 5. The first road data 5 of the intersection data 50 corresponding to the intersection 100.
4 stores data on the road 80 having the road number “1”.

In the sign code 60, when the road 80 is passed through the intersection 100, the traffic rules determined for the road 80 are coded and stored. Similarly, the sign code (not shown) of the second road data 54 indicates that the road 81 having the road number “2” has the intersection 10
When entering after passing through 0, the traffic rules decided on the road 81 are coded and stored. Also,
In the sign code (not shown) of the third road data, when the road 82 having the road number “3” enters through the intersection 100, the traffic rule determined for the road 82 is coded and stored. ing. Further, in the sign code (not shown) of the fourth road data, when entering the road 83 having the road number “4” through the intersection 100, the traffic rule determined for the road 83 is coded. Remembered In this way, traffic regulations are accommodated at each intersection while corresponding to each constituent road.

Regarding the first road data 54 of the intersection data 50 corresponding to the intersection 100, the right turn intersection code 61A is the closest to the right turn when the road 80 passes through the intersection 100. The intersection code for the intersection 102 is stored. Also,
The right turn road number 61B relates to the road 87 which turns right at the intersection 102 which is closest to the right turn when the vehicle travels on the road 80 after passing the intersection 100,
The road number “3” based on the intersection 102 is stored.

Similarly, the left turn intersection code 62A stores the intersection code for the closest intersection 101 to the left when the vehicle travels on the road 80 after passing through the intersection 100. Left turn road number 62
At B, when traveling on the road 80 through the intersection 100, the intersection 101 closest to the left turn
The road number “2” based on the intersection 101 is stored for the road 85 which turns left and enters.

Returning to FIG. 1, the video control circuit 19 is for periodically reading the contents (mainly a road map) stored in the video RAM (not shown) and converting the contents into a video signal. The generated video signal is displayed on the display device 20.
Although FIG. 5 shows an example of the road map 70 displayed on the display device 20, the current position mark 72 shown on the road map 70 is shown.
Indicates the current position of the vehicle recognized or indexed by the position recognition unit 12, the gyro sensor 13, and the vehicle speed sensor 14, and the arrow of the current position mark 72 indicates the traveling direction of the vehicle. Note that the sign 71 displayed on the road 87 and the sign 73 described on the road 85 are described for convenience of explanation of the traffic violation prevention notification process described later, and are not actually displayed.

Next, the "traffic violation prevention notification" in the car navigation system 1 according to this embodiment will be described with reference to FIG. FIG. 3 is a flowchart of traffic violation prevention notification processing. First, in S1, it is determined whether or not the designated direction reading circuit 15 has read the designated direction designated by the direction indicator. When the designated direction reading circuit 15 has read the designated direction (S1: Yes), the process proceeds to S2, but when the designated direction reading circuit 15 has not read the designated direction (S1: No), the process returns to S1 and the designated direction. It waits until the reading circuit 15 reads the designated direction.

In step S2, the RAM 17 is updated with the intersection code of the planned right / left turn intersection, which is the intersection where the vehicle turns right / left when entering the planned road, and the road number of the planned road based on the planned left / right turn intersection. It is specified from the intersection data 50 stored in the hard disk 31 based on the processed intersection code and road number. When identifying the planned approach road, for example, to identify the planned left / right turn intersection,
When the road to be approached is the road 87 and the traffic regulation of the road 87 is one-way traffic of the sign 71, when entering the road 87 from the intersection 102, it is a traffic violation because it approaches in the direction opposite to the one-way traffic of the sign 71. However, when entering the road 87 in the same direction as the one-way passage of the sign 71 from an intersection (not shown), it is not a traffic violation, that is, even when entering the road 87 which is the same planned road, if the right and left planned intersections are different, This is because the determination as to whether or not the traffic is a violation may be different. The same applies when the traffic rules prohibit entry or turn left or right.

Next, the identification of the intersection code of the planned right / left turn intersection and the road number of the planned road to enter based on the planned right / left turn intersection will be specifically described with reference to FIG. Here, the current position mark 7 of the road map 70 of FIG.
It is assumed that the vehicle is traveling in the direction of the arrow of the current position mark 72 at the point indicated by 2. In this case, the intersection code storage area 22 of the RAM 17 stores the intersection code corresponding to the intersection 100, and the road number storage area 23 of the RAM 17 stores the road number “1” of the road 80 based on the intersection 100. There is.

At this time, if the driver actuates the direction indicator of the vehicle to the right (hereinafter referred to as "when the designated direction is on the right"), the intersection code stored in the intersection code storage area 22 of the RAM 17 will be described. From the intersection data 50 having the same intersection code 51 (corresponding to the intersection 100), the road number “1” (the road 80 based on the intersection 100) stored in the road number storage area 23 of the RAM 17 is stored.
(Corresponding to (1)), the right turn intersection code 61A of the first road data 54 is read to identify the intersection code of the intersection 102 which is the planned right / left turn intersection, and
Similarly, the right turn road number 61B of the first road data 54 is read, and the road number "3" of the planned approach road 87 based on the intersection 102 which is the planned right / left turn intersection is read.

If the driver operates the turn signal indicator of the vehicle to the left side (hereinafter referred to as "when the designated direction is on the left side"), the intersection code storage area 2 of the RAM 17 will be described.
Intersection data 50 having the same intersection code 51 as the intersection code stored in 2 (corresponding to the intersection 100)
The left turn intersection code 62A of the first road data 54 corresponding to the road number “1” (corresponding to the road 80 based on the intersection 100) stored in the road number storage area 23 of the RAM 17 is read from the The intersection code of the intersection 101 which is an intersection is specified, the left turn road number 62B of the first road data 54 is also read, and the road number "2" of the planned approach road 85 based on the intersection 101 which is the planned right / left turn intersection is read. .

At S3, if the vehicle enters the planned road, it is determined whether or not there is a traffic violation. When making such a determination, the traffic rules determined for the planned approach road are read from the intersection data 50 stored in the hard disk device 18.

When the designated direction is the right side, from the intersection data 50 having the same intersection code 51 as the intersection code of the intersection 102 which is the planned right / left turn intersection, the planned approach road 87 based on the intersection 102 which is the planned right / left turn intersection is obtained. By reading the sign code (not shown) of the third road data corresponding to the road number “3” of
The traffic rules (one-way traffic of the sign 71) determined in (1) are read, and if the own vehicle enters the planned approach road 87, it is determined whether it is a traffic violation. In this case, since it is a traffic violation (S3: Yes), a warning sound is generated by the warning sound generating device 21 in S4, so that it is a traffic violation if the vehicle enters the road 87 which is the planned road to enter. Before the vehicle enters the road 87 which is the planned road, the driver is informed to prevent a traffic violation. After the warning sound is generated, the process returns to S1 and waits until the designated direction reading circuit 15 reads the designated direction.

When the designated direction is the left side, from the intersection data 50 having the same intersection code 51 as the intersection code of the intersection 101 which is the planned right / left turn intersection, the planned approach road 85 based on the intersection 101 which is the planned right / left turn intersection is obtained. By reading the sign code 60 of the second road data 55 corresponding to the road number "2" of No. 2, the traffic rule (one way of the sign 73 shown in FIG. 5) determined for the planned approach road 85 is read, When the own vehicle enters the planned approach road 85, it is determined whether or not there is a traffic violation. In this case, since it is not a traffic violation (S3: No), the process returns to S1 and waits until the designated direction reading circuit 15 reads the designated direction.

As described in detail above, according to the car navigation system 1 of the present embodiment, in the traffic violation prevention notification processing (S1 to S4), the designated direction reading circuit 15 gives an instruction from the turn indicator of the own vehicle. It is possible to read the direction (S1), and based on the intersection code and the road number updated in the RAM 17, the intersection code of the right-left turn planned intersection, which is the intersection where the vehicle turns right or left when entering the planned road. And the road number of the planned approach road based on the planned right / left turn intersection can be specified before entering the planned road (S2), the intersection code of the planned right / left turn intersection, and the approach based on the planned left / right turn intersection Based on the road number of the planned road, the traffic rules of the planned road to be approached are read from the intersection data 50 so that if the vehicle enters the planned road, the traffic will change. It is determined whether the violation (S
3) If the vehicle enters the planned access road and it is a traffic violation, a warning sound is generated by the warning sound generation device 21 and the driver is informed to that effect before the vehicle enters the planned road. You can inform (S4), "Notice of traffic violation prevention"
Therefore, it is possible to provide the car navigation device 1 that prevents traffic violations such as one-way traffic, entry prohibition, and right / left turn prohibition.

It should be noted that the present invention is not limited to the above embodiment, and various changes can be made without departing from the gist of the present invention. For example, in the above-described embodiment, it is impossible to specify the planned approach road when there are five or more constituent roads of the planned right / left turn intersection, but it is confirmed that the intersection data 50 has five or more constituent roads. If it is stored, it is possible to determine whether or not there are five or more roads constituting the planned left / right turn intersection when the planned left / right turn intersection is specified in S2 of the traffic violation prevention notification process of FIG. , If there are five or more roads constituting the planned left / right turn intersection, the process proceeds to S4, where the warning sound generator 21 generates a warning sound,
Since the driver can be informed that there are five or more roads that make up the planned left / right intersection before the vehicle enters the planned road, he / she must pay close attention to the signs and make a right / left turn. Passing the planned intersection will prevent traffic violations.

Further, in the above embodiment, the traffic violation prevention notification processing of FIG. 3 is carried out for the planned approach road (hereinafter referred to as "straight road") which is to be entered by going straight through the intersection. However, if the designated direction reading circuit 15 does not read the designated direction within a predetermined distance from the nearest intersection in the traveling direction, the planned approach road is identified as a straight road in S2 of the traffic violation prevention notification process. If possible, the traffic violation prevention notification process can be performed even on a straight road.

In the above embodiment, the traffic violation prevention notification processing of FIG. 3 can be effectively performed when the traffic restrictions are one-way traffic, entry prohibition, and right / left prohibition. , Height limitation, maximum width, vehicle type limitation, etc., if restricted by the type and size of the vehicle (hereinafter referred to as "vehicle characteristics"), weight limitation, height limitation, maximum width, vehicle type limitation The traffic regulations such as the above are encoded and stored in the sign code 60 of the intersection data 50, the characteristics of the own vehicle are stored in the hard disk device 18, and the sign code of the intersection data 50 is stored in S3 of the traffic violation prevention notification process. If the traffic restrictions read from 60 are weight restrictions, height restrictions, maximum width, vehicle type restrictions, etc., the hard disk drive 18
If it is possible to determine whether or not a vehicle enters the planned road to enter based on the characteristics of the vehicle stored in the table, it is a traffic violation to enter the planned road. It is possible to inform the driver of this fact before the vehicle enters the planned road, and it is possible to prevent traffic violation.

When the traffic regulation is restricted by the day, time, etc., the traffic regulation concerning the day, time, etc. is coded and stored in the sign code 60 of the intersection data 50, and the clock mechanism is provided. In S3 of the traffic violation prevention notification processing, the sign code 60 of the intersection data 50
If the traffic regulation read from is related to the day, time, etc., determine whether the vehicle is a traffic violation if the vehicle enters the planned access road based on the current date and time indicated by the clock mechanism. If it is possible, it is possible to inform the driver that the vehicle is a traffic violation if the vehicle enters the planned road, before the vehicle enters the planned road, and it is possible to prevent the traffic violation in advance.

Further, S in the traffic violation prevention notification processing of FIG.
In FIG. 4, the warning sound generated by the warning sound generation device 21 informs the driver of the own vehicle that it is a traffic violation if the own vehicle enters the planned road, but the display device 20 and the windshield of the own vehicle. You may display that fact. Also,
The warning sound generating device 21 may generate the warning sound not only before the vehicle enters the planned road, but also when the vehicle is traveling on the planned road.

When the gyro sensor 13 detects that the vehicle has made a U-turn on the road, in the updating process of FIG. 4, the intersection code stored in the intersection code storage area 22 is used to make a U-turn on the road. The road number stored in the road number storage area 23 is updated to the intersection code corresponding to the intersection closest to the previous traveling direction (hereinafter, referred to as "intersection regarding U-turn"), and the traveling road is based on the intersection regarding U-turn. If the road number can be updated, the planned approach road can be accurately specified in S2 of the traffic violation prevention notification processing of FIG.

[0042]

As is apparent from the above description, according to the car navigation apparatus of the present invention, the designated direction reading circuit can read the designated direction from the direction indicator of the own vehicle in the traffic violation prevention notification processing. Based on the intersection code and road number that can be updated in RAM,
Identifies the intersection code of the planned right / left turn intersection, which is an intersection where the vehicle turns right / left when entering the planned road, and the road number of the planned road based on the planned left / right turn intersection, before entering the planned road It is possible to read the traffic rules of the planned approach road from the intersection data based on the intersection code of the planned left and right turn intersections and the road number of the planned approach road based on the planned left and right turn intersections. If you enter, determine whether it is a traffic violation,
If your vehicle enters the planned access road and it is a traffic violation, a warning sound can be generated by the warning sound generator to inform the driver of that fact before the vehicle enters the planned road. Therefore, it is possible to issue a "traffic violation prevention notification", and thus it is possible to provide a car navigation device that prevents traffic violations such as one-way traffic, entry prohibition, and right / left turn prohibition.

[Brief description of the drawings]

FIG. 1 is a block diagram of a car navigation device.

FIG. 2 is a diagram showing intersection data.

FIG. 3 is a flowchart of traffic violation prevention processing.

FIG. 4 is a flowchart of update processing.

FIG. 5 is a diagram showing a map displayed on a display device.

[Explanation of symbols]

 1 Car navigation device 10 CPU 15 Designated direction reading circuit 17 RAM 20 Display device 21 Intersection code storage area 22 Road number storage area 23 Warning sound generator 30 Map information 51 Intersection code 60 Sign code 72 Current position mark

Claims (3)

[Claims] 1. Obtaining the present position and traveling direction of the own vehicle,
On the map displayed on the display device based on the map information,
In the car navigation device that displays the current position, the traffic regulation of the roads divided by the intersections described in the map, the traffic regulation storage means for each of the intersections corresponding to the roads constituting the intersection, A designated direction reading means for reading a designated direction of a direction indicator of the own vehicle; and a warning means for warning the driver of the own vehicle, wherein the designated position reading means reads the designated direction, and the current position Based on the traveling direction, the map information, and the designated direction, the right-and-left turn planned intersection where the own vehicle is scheduled to make a right turn or left turn is specified, and based on the designated direction and the right-and-left turn planned intersection, the own vehicle Reads the traffic regulation corresponding to the planned approach road and judges whether it is a traffic violation if the own vehicle enters the planned approach road. The car navigation device is characterized in that the warning means warns the driver when it is determined that 2. The car navigation system according to claim 1, wherein an intersection code that identifies the intersection, a road number that identifies one of the roads that form the intersection, and the own vehicle passes through the intersection. Storage means for updating and storing the intersection code corresponding to the passed intersection and the road number corresponding to the road on which the own vehicle is traveling and which constitutes the passed intersection. Based on the intersection information and the road number stored in the storage means and the map information and the specified direction,
The intersection code corresponding to the planned right / left turn intersection and the road number corresponding to the planned entrance road are specified, and the traffic regulation corresponding to the planned entrance road is determined based on the intersection code and the road number. A car navigation device characterized by reading. 3. The car navigation device according to claim 1, wherein the traffic regulation is entry prohibition, one-way traffic, and right / left turn prohibition.