JP2009161139A - Driving auxiliary device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem wherein a driver of a vehicle may not recognize an area which is difficult for a driver who drives a vehicle in an adjacent lane, to cope with. <P>SOLUTION: A driving auxiliary device includes: a means of recognizing the presence or absence of the other vehicle running in the adjacent lane; a specifying means of specifying the area which is difficult for a driver who drives the other vehicle to cope with; and an on-vehicle drawing means of actually drawing the area on a road surface by illuminating the area from the vehicle which is specified by the specifying means. The driver directly recognizes the area since a projecting display device mounted on the vehicle running side by side, actually draws the area on the road surface which is difficult for the driver who drives the other vehicle in the adjacent lane to cope with. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

One of the tasks that require the highest level of attention and judgment when driving a vehicle is to appropriately take a positional relationship with the vehicle traveling in the adjacent lane.
If the vehicle travels within the blind spot range of another vehicle traveling in the adjacent lane, the safe traveling may be threatened by an unexpected course change of the other vehicle that is not aware of the presence of the host vehicle. As a result of inadvertently changing the course, if the front of another vehicle trying to overtake the host vehicle is blocked, it is difficult to travel safely.
However, it is not easy to know the blind spot range of other vehicles traveling in the adjacent lane. There are various types of vehicles traveling in the adjacent lane, and there are many drivers who do not know the blind spot range of large vehicles and special vehicles.
The range that cannot be avoided for the driver of the other vehicle varies depending on the vehicle speed of the other vehicle. However, it is not easy to accurately recognize the vehicle speed of the other vehicle to be overtaken, and if the vehicle speed of the other vehicle is mistakenly recognized, a situation in which the front of the other vehicle is blocked unintentionally occurs.

Patent Document 1 discloses a technique for calculating a blind spot range when a driver is seated on a vehicle. Patent Document 2 discloses a technique for displaying a blind spot range of a driver by displaying or printing the blind spot range on a display.
By utilizing such a technique, it is possible to calculate the blind spot range of another vehicle traveling in the adjacent lane.
Non-Patent Documents 1 to 3 disclose techniques for extracting other vehicles existing around the own vehicle and specifying their positions. By utilizing these technologies, it is possible to determine the presence or absence of other vehicles traveling in adjacent lanes and to calculate the vehicle speed of other vehicles. If the vehicle speed of the other vehicle can be calculated, a range that cannot be avoided for the other vehicle can be calculated.

JP-A-9-197950 Japanese Patent Laid-Open No. 10-49041 Proceedings of the 12th Image Sensing Symposium, pp277-283 (June, 2006) "Evaluation of input features used for moving object identification in outdoor environment using AdaBoost" Denso Technical Review Vol.12, No.1, p35-39 (2007) "Pedestrian Recognition Technology Using Laser Radar" 12th Annual Conference of the Robotics Society of Japan pp 323-324 (1994) "Detection of Obstacles with Stereon Vision"

If the technique of patent document 1 and patent document 2 is used, the blind spot range of other vehicles can be known. However, it is the driver of the vehicle traveling in the adjacent lane that wants to know where the blind spot range of the other vehicle is. With the techniques of Patent Document 1 and Patent Document 2, even if the blind spot range of other vehicles can be calculated, the driver of the vehicle traveling in the adjacent lane that needs to know it can know the blind spot range. Can not.
Although the current technology can calculate the blind spot range of other vehicles, there is no way to inform the driver who wants to know the current technology.

  Since the same kind of thing is within the range of the braking distance, it can be said that it cannot be avoided if another vehicle enters. By the techniques of Non-Patent Documents 1 to 3, the vehicle speed of another vehicle traveling in the adjacent lane can be calculated. If the vehicle speed can be calculated, the inevitable range of other vehicles can be calculated. However, the current technology cannot inform the driver of the other vehicle of the calculated result. There is a need for a technique for notifying the driver of the second vehicle of the inevitable range of the first vehicle when one of the two vehicles running in parallel is the first vehicle and the other is the second vehicle. Yes.

In the present invention, when one of the two vehicles running in parallel is the first vehicle and the other is the second vehicle, a range that is difficult for the driver of the first vehicle to deal with is actually on the road surface. Thus, a technique for notifying the driver of the second vehicle of the difficult handling range of the first vehicle is provided.
In this specification, either the blind spot range of the driver of the first vehicle (sometimes simply referred to as the blind spot range) or the range that cannot be avoided by the driver of the first vehicle (sometimes simply referred to as the inevitable range). Or both ranges are referred to as difficult-to-handle ranges for the first vehicle. A useful result may be obtained by drawing one of the blind spot range and the unavoidable range, or a useful result may be obtained by drawing a range that belongs to either the blind spot range or the unavoidable range. Sometimes.

The present invention relates to a device for assisting a driving operation, a means for determining the presence or absence of another vehicle traveling in an adjacent lane, and a specifying means for specifying a range on a road surface that is difficult for the driver of the vehicle to handle. In addition, vehicle-mounted drawing means for irradiating the road surface in the range specified by the specifying means from the vehicle and actually drawing the range on the road surface is provided.
With the techniques of Non-Patent Documents 1 to 3, it is possible to determine whether or not another vehicle is present in the field of view of the host vehicle, and if it is present, the position can be specified. With these techniques, it is possible to construct means for determining the presence or absence of other vehicles traveling in the adjacent lane.

  According to the driving assistance device of the present invention, it is possible to actually draw and display a range that is difficult for the driver of another vehicle to deal with, and to directly display a range that can be safely driven when driving the vehicle. Can be recognized. That is, when one of the two vehicles running in parallel is the first vehicle and the other is the second vehicle, the driving assistance device for the second vehicle can deal with the driver of the first vehicle. Since the difficult range is actually drawn on the road surface, the driver of the second vehicle can directly recognize the range and drive safely so as not to enter the range.

  The range that is actually drawn on the road surface may be a range that the driver of another vehicle cannot avoid. Or the range which is at least one of the range which the driver | operator of other vehicles cannot avoid, and the blind spot range of the driver | operator of other vehicles may be sufficient.

The process of drawing the difficult-to-handle range on the road surface may be executed only when necessary.
In that case, a means for determining whether or not the own vehicle is in a difficult-to-handle range of another vehicle is added, and when it is determined that the determination means is present, the vehicle-mounted drawing means draws the range on the road surface. Like that. Alternatively, a means for determining whether or not the own vehicle enters the difficult-to-handle range of another vehicle is added, and when it is determined that the determination means enters, the in-vehicle drawing means draws the range on the road surface. May be.

  The device of the present invention may not only draw the difficult-to-handle area on the road surface, but may also have a warning device for the driver of the host vehicle.

  According to the present invention, a range that is difficult for a driver of a vehicle traveling in an adjacent lane to deal with can be actually drawn on the road surface, and the range can be actually displayed in real time. Therefore, the driver of another vehicle traveling in the adjacent lane can travel safely by operating the vehicle so as not to enter the range drawn on the road surface. Alternatively, when the vehicle is traveling within the difficult-to-handle range of another vehicle, or when trying to enter the difficult-to-handle range of another vehicle, the driver's attention can be directly drawn.

First, preferred embodiments of the present invention will be listed.
(Characteristic 1) The specific stage specifies the driver's blind spot range.
(Characteristic 2) When the host vehicle is traveling within the range specified by the specifying means, the driver of the host vehicle is warned. A difficult-to-handle area may be drawn or may not be drawn. If the driver is warned, safety can be improved without drawing the difficult-to-handle area on the road surface.
(Characteristic 3) When the own vehicle enters the range specified by the specifying means, the driver of the own vehicle is warned. A difficult-to-handle area may be drawn or may not be drawn. If the driver is warned, safety can be improved without drawing the difficult-to-handle area on the road surface.

Example 1
In the first embodiment, as shown in FIG. 2, the other vehicle traveling in the adjacent lane is in a range that is difficult for the driver of one vehicle (hereinafter referred to as the first vehicle) 200 traveling in the adjacent lane. Drawing is actually performed on the road surface 222 by an in-vehicle driving assistance device 220 (hereinafter referred to as a second vehicle). In FIG. 2, 202 is a blind spot range by the right side mirror of the first vehicle 200, 204 is a blind spot range by the right pillar of the first vehicle 200, 206 is a range unavoidable by the driver of the first vehicle 200, and 210 is the first range. A blind spot range by the left pillar of the vehicle 200, 212 a blind spot range by the left side mirror of the first vehicle 200, and 214 a blind spot range by the passenger of the first vehicle 200. Reference numeral 208 denotes a range in which the blind spot ranges 202, 204, 210, 212, and 214 overlap the inevitable range 206, that is, a range that is at least one of the blind spot range and the inevitable range. A range 208 indicates a range that is difficult for the driver of the first vehicle 200 to deal with. The on-vehicle driving assist device of the second vehicle 220 actually draws the difficult-to-handle range 208 of the first vehicle 200 on the road surface 222.

As shown in FIG. 1, the driving assistance device 100 controls the projection display device 110 by the arithmetic device 114, and draws the difficult-to-handle area 208 on the actual road surface 222 as shown in FIG. 2.
In order to calculate the handling difficulty range 208 of the first vehicle 200 on the road surface 222, as shown in FIG. 1, the apparatus 100 may be an outside camera 102 (laser radar or the like, or a far infrared camera). A vehicle speed sensor 104, a steering angle sensor 106, a projection display device 110, and a warning device 112.

  In addition, the apparatus 100 includes an arithmetic unit 114, a vehicle shape / vehicle type database 116 that stores vehicle shapes for each vehicle type such as sedans, vans, buses, small trucks, and large trucks, and blind spot ranges 202, 204, 210 for each vehicle type. , 212, 214 are stored in a blind spot range / vehicle type / driver's seat database 118. Even in the same vehicle type, the blind spot range is different between the right-hand drive vehicle and the left-hand drive vehicle. The blind spot range / vehicle type / driver's seat database 118 stores different blind spot ranges for right-hand drive vehicles and left-hand drive vehicles. Whether the vehicle is a right-hand drive vehicle or a left-hand drive vehicle can be determined by analyzing the video information of the outside-camera shooting camera 102 and determining whether the driver is on the right side or the left side of the vehicle. The blind spot range varies depending on the presence or absence of a passenger. The blind spot range / vehicle type / driver's seat database 118 stores different blind spot ranges depending on the presence or absence of a passenger. When there is a passenger, it is difficult to discriminate between the driver and the passenger even if the video information of the outside camera 102 is analyzed. Therefore, in this case, a blind spot range is defined by overlapping a blind spot range when a passenger is present in a right-hand drive vehicle and a blind spot range when a passenger is present in a left-hand drive vehicle. Further, a range in which the blind spot range of the right-hand drive vehicle and the blind spot range of the left-hand drive vehicle are overlapped is defined as a blind spot range.

The apparatus 100 further includes a program 120 that executes a process of extracting the vehicle 200 from the video information of the outside camera 102. The vehicle extraction processing program 120 determines the vehicle type from the extracted vehicle shape of the vehicle, determines the presence or absence of a passenger, and if there is no passenger, determines whether the vehicle is a right steering wheel or a left steering wheel.
The apparatus 100 searches and extracts the blind spot range / vehicle type / driver's seat database 118 based on the vehicle type determined by the vehicle extraction processing program 120, the presence / absence of a passenger, and the determination result of whether the vehicle is a right steering wheel or a left steering wheel. A program 122 for calculating the blind spot range of the vehicle 200 is also provided.

The vehicle extraction processing program 120 also calculates the positional relationship of the extracted vehicle 200 with respect to the host vehicle 220. By calculating the positional relationship by changing the time, the vehicle speed and traveling direction of the extracted vehicle 200 can be calculated. The apparatus 100 includes a program 124 that executes a process for calculating the vehicle speed of the vehicle 200 and a program 126 that executes a process for calculating the travel direction of the extracted vehicle 200.
The apparatus 100 includes a vehicle speed sensor 104 and a steering angle sensor 106, and can calculate a traveling course of the vehicle 220. The apparatus 100 includes a program 134 that executes a process of calculating a traveling course of the vehicle 220.
If the traveling course of the vehicle 220 is determined and the vehicle speed and traveling direction of the vehicle 200 with respect to the vehicle 220 are determined, the traveling course of the vehicle 200 can be calculated. The apparatus 100 includes a program 128 that executes a process of calculating a travel course of the vehicle 200.
If the traveling course of the vehicle 200 is determined, an inevitable range 206 of the vehicle 200 can be calculated. The apparatus 100 includes a program 130 that executes processing for calculating an unavoidable range 206 of the vehicle 200.
If the inevitable range 206 of the vehicle 200 and the blind spot ranges 202, 204, 210, 212, and 214 of the vehicle 200 are found, the difficult-to-handle range 208 of the vehicle 200 can be calculated. Since the travel course of the vehicle 200 has already been calculated, it can be calculated that the coping difficulty range 208 of the vehicle 200 changes over time. The apparatus 100 includes a program 132 that executes a process of calculating a difficult-to-handle range 208 of the vehicle 200 that changes with time.
If it is calculated that the difficult-to-handle area 208 of the vehicle 200 changes with time and the traveling course of the vehicle 220 is calculated, it can be determined whether or not the vehicle 220 enters the difficult-to-handle area 208 of the vehicle 200. . The apparatus 100 includes a program 136 that executes processing for determining whether or not the vehicle 220 enters the difficult-to-handle area 208 of the vehicle 200. The program 136 can determine whether it has already entered or will enter. In case of intrusion from now on, the time to intrusion is also calculated.

  FIG. 2 shows an example of the difficult-to-handle area 208 drawn on the road surface 222, and a striped pattern similar to the zebra zone is drawn in the difficult-to-handle area 208. Instead of this, the inside of the difficult-to-handle area 208 may be illuminated brighter than the outside of the difficult-to-handle area, or characters indicating the difficult-to-handle area may be displayed together with the outline indicating the difficult-to-handle area 208. Good.

FIGS. 3A to 3I illustrate the mounting positions of the projection display device 110. By arranging a plurality of projection display devices 110 around the vehicle body, the front and side of the vehicle are shown. The coping difficulty range 208 can be displayed. (J) of FIG. 3 illustrates the mounting height of the projection display device 110, and is disposed at the height below the floor, the lower side of the door glass, or the ceiling height.
The projection display device 110 may be an imaging system such as a projector, may be a raster scan of the laser beam, or may be a vector scan of the laser beam. The light source is not limited, and may be a laser, an ultrahigh pressure mercury lamp, a halogen lamp, or the like. An in-vehicle drawing means can be constructed by the projection display device 110. The above is merely an example, and any drawing means can be employed.

4 and 5 show processing procedures executed by the apparatus 100. FIG. In step S <b> 2, video information of the outside-camera shooting camera 102 is processed by the program 120 to extract a vehicle that exists within the shooting range of the camera 102. In step S4, it is determined whether the specified vehicle is in the adjacent lane.
If it is determined in step S4 that there is a vehicle in the adjacent lane (hereinafter, this vehicle is referred to as vehicle 200, and the vehicle equipped with device 100 is referred to as vehicle 220), the vehicle shape of vehicle 200 is determined from the vehicle shape of vehicle 200 in step S6. To decide. In step S8, the presence or absence of a passenger is determined. If there is no passenger, it is determined in step S10 whether the driver is on the left side or the right side of the vehicle. Thereafter, the position of the vehicle 200 is calculated in step S12. In this calculation, the position of the vehicle 200 with respect to the vehicle 220 is calculated. The position of the vehicle 200 calculated in step S12 is stored in the storage device in step S16.

4 and 5 are repeatedly executed at time intervals. In step S16 executed in the previous process, the position of the vehicle 200 at the time of the previous process is stored.
In step S14, the traveling speed and traveling direction of the vehicle 200 are calculated from the position of the vehicle 200 stored at the previous processing, the position of the vehicle 200 calculated at the current processing, and the time difference therebetween.
In step S16, the position of the vehicle 200 calculated in step S12 is stored in preparation for the next processing.
In step S18, the traveling course of the vehicle 200 is calculated from the traveling speed and traveling direction of the vehicle 200 calculated in step S14. Here, the position of the vehicle 200 at that time is calculated and found in association with a future time.
As described above, the data for calculating the blind spot ranges 202, 204, 210, 212, and 214 of the vehicle 200 and the data for calculating the inevitable range 206 of the vehicle 200 are aligned. Therefore, in step S20, the blind spot ranges 202, 204, 210, 212, and 214 of the vehicle 200 are calculated, the inevitable range 206 of the vehicle 200 is calculated, and both are combined to calculate the difficult to handle range 208. Further, the travel course of the vehicle 200 is taken into account, and the relationship in which the difficult-to-handle range 208 changes with time is calculated. As a result, the handling difficulty range 208 of the vehicle 200 at that time is calculated and obtained in association with the future time.
In step S22, the detected values of the vehicle speed sensor 104 and the steering angle sensor 106 are input to the arithmetic unit 114, and in step S24, the traveling course of the vehicle 220 is calculated.

FIG. 5 shows four types of processing procedures executed following the processing of FIG. First, the processing procedure (1) will be described.
In the processing procedure (1), it is determined in step S26 whether or not there is a vehicle in the adjacent lane, and if not, the current processing is terminated. After a predetermined time, the process of FIG. 4 is executed again.
When the vehicle 200 is in the adjacent lane, the difficult handling range 208 of the vehicle 200 is actually drawn on the road surface 222 by the device 100 mounted on the vehicle 220. Thus, the driver of the vehicle 220 can directly know the distinction between the range in which the vehicle 220 can travel safely in relation to the vehicle 200 and the range in which the vehicle 220 cannot travel safely. The driver is assisted by the device 100 to be able to drive safely.
In step S <b> 30, it is further determined whether or not the vehicle 220 has entered the difficult handling range 208 of the vehicle 200. If the vehicle 200 is within the difficult handling range 208, the driver of the vehicle 220 is warned in step S32. The warning executed in step S32 may be a voice warning such as “caution”, or may be warned with a buzzer or the like.

  In FIG. 5B, step S30a is executed instead of step S30. Here, it is determined whether vehicle 220 exists in difficult-to-handle area 208 of vehicle 200 or whether vehicle 220 enters difficult-to-handle area 208 of vehicle 200 within a predetermined time. In FIG. 5 (2), when the vehicle 220 exists in the difficult-to-handle area 208 of the vehicle 200 or when the vehicle 220 enters the difficult-to-handle area 208 of the vehicle 200 within a predetermined time, the driver of the vehicle 220 is shown. To warn. In the warning in step S120, the warning intensity may be changed depending on the time until intrusion.

In FIG. 5 (3), in step S 30, it is determined whether or not the vehicle 220 exists in the difficult handling range 208 of the vehicle 200. The same process as step S30 in FIG. If it is determined in step S30 that the vehicle 220 exists in the difficult handling range 208 of the vehicle 200, the difficult handling range 208 of the vehicle 200 is actually drawn on the actual road surface 222, as shown in FIG. Warning. The other points are the same as in FIG.
In (4) of FIG. 5, step S30a is executed instead of step S30. Other points are the same as FIG. 5 (3) or FIG. 5 (2).
In the above description, an accurate blind spot range is calculated and obtained. Alternatively, the blind spot range may be measured or calculated in advance. The measured or calculated blind spot range may be stored, and the difficult-to-handle range 208 calculated based on the stored blind spot range may be drawn on the road surface 222.

(Example 2)
In the second embodiment, the difficult handling range 208 of the vehicle 200 is calculated on the vehicle 200 side, and the difficult handling range 208 of the vehicle 200 is transmitted to the vehicle 220 using the vehicle-to-vehicle communication device. The other points are the same as those in the first embodiment. 6 and 7, members or processes indicated by the same reference numerals as those in the first embodiment are the same as those in the first embodiment, and redundant description is omitted.

The vehicle 200 calculates the blind spot ranges 202, 204, 210, 212, and 214 of the host vehicle and the inevitable range 206 of the host vehicle, and uses the vehicle-to-vehicle communication device to transmit data indicating these ranges. To 220. In addition, the travel course of the vehicle 200 is calculated, and data indicating the calculated travel course is output to the vehicle 220 using the vehicle-to-vehicle communication device.
FIG. 6 shows a hardware configuration of the device 150 according to the second embodiment, which is mounted on the vehicle 220. The device 150 includes an inter-vehicle communication device 138 instead of the outside-camera shooting camera 102.
The apparatus 150 includes a program 140 that executes processing for inputting data indicating the blind spot ranges 202, 204, 210, 212, and 214 of the vehicle 200 from the vehicle 200 using the inter-vehicle / vehicle communication apparatus 138. The device 150 includes a program 142 that executes a process of inputting data indicating an unavoidable range 206 of the vehicle 200 from the vehicle 200 using the vehicle-to-vehicle communication device 138. The device 150 includes a program 144 that executes a process of inputting data indicating a traveling course of the vehicle 200 from the vehicle 200 using the vehicle-to-vehicle communication device 138.
When data indicating the blind spot range, the unavoidable range, and the traveling course are input from the vehicle 200 by the vehicle-to-vehicle communication device 138, the device 150 can calculate the difficult-to-handle range 208 of the vehicle 200 that changes with time. The program 132 that executes the process is the same as the program of the first embodiment.

FIG. 7 shows a processing procedure executed by the device 150.
In step S52 of FIG. 7, vehicle-to-vehicle communication is performed. In step S <b> 54, data indicating the blind spot ranges 202, 204, 210, 212, and 214 of the vehicle 200 is input to the device 150 of the vehicle 220. In step S <b> 56, data indicating the traveling course of the vehicle 200 is input to the device 150 of the vehicle 220. In step S58, data indicating the inevitable range of the vehicle 200 is input to the device 150 of the vehicle 220. The processing after step S20 is the same as that in FIG. After the process of FIG. 7 is completed, the process of FIG. 5 is executed. The overlapping description of FIG. 5 is omitted.
In Example 2, the same result as in Example 1 can be obtained. When the blind spot range of the vehicle 200 is calculated by the vehicle 200, the blind spot range can be calculated more accurately than in the case of the first embodiment. For calculating the blind spot range, the technique disclosed in Japanese Patent Laid-Open No. 9-197950 can be used. The technique described in the patent application (reference number K07-382) filed on the same day by the present applicant can also be used.

(Third embodiment)
In this embodiment, the device mounted on the vehicle 220 warns the driver of the vehicle 220 when the vehicle 220 enters the difficult-to-handle area 208 of the vehicle 200. In this embodiment, the difficult handling range 208 is not drawn. Even if the handling difficulty range 208 is not drawn, the driving safety of the vehicle 220 can be improved by warning the driver of the vehicle 220.
The process of FIG. 8 shows a process procedure performed following the process of FIG. 4 or FIG. In (1), when the vehicle 220 has entered the difficult-to-handle area 208 of the vehicle 200, the driver of the vehicle 220 is warned. In (2), the driver of the vehicle 220 is warned when the vehicle 220 has entered or entered the difficult handling range 208 of the vehicle 200. In (2), the warning intensity may be changed according to the time until intrusion.

Specific examples of the present invention have been described in detail above, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.
The technical elements described in this specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology illustrated in the present specification or the drawings achieves a plurality of objects at the same time, and has technical utility by achieving one of the objects.

The figure which shows the hardware constitutions of the driving assistance device of 1st Example. The figure which shows an example of the drawing pattern of the driving assistance apparatus of 1st Example. The figure which illustrates the mounting position of vehicle-mounted drawing means (projection type display device). The figure which shows the process sequence which the driving assistance device of 1st Example performs. The figure which shows the process sequence performed following the process sequence of FIG. The figure which shows the hardware constitutions of the driving assistance apparatus of 2nd Example. The figure which shows a part of process sequence which the driving assistance device of 2nd Example performs. The figure which shows a part of process sequence which the driving assistance device of 3rd Example performs.

DESCRIPTION OF SYMBOLS 100,150 ... Driving assistance device 102 of Example ... Outside vehicle camera 104 ... Vehicle speed sensor 106 ... Steering angle sensor 110 ... Projection type display device 112 ... Warning device 114 ... Arithmetic unit 116 ... vehicle shape / vehicle type database 118 ... blind spot range / vehicle type / driver's seat database 120 ... vehicle extraction process 122 ... blind spot range calculation process 124 ... vehicle speed calculation process 126 ... travel Direction calculation process 128... Travel course calculation process 130... Calculation process 132 of unavoidable range... Calculation process 134 of transition of difficult to cope range... Self-vehicle travel course calculation process 136. Processing 138: Vehicle-to-vehicle communication device

Claims (5)

Means for determining the presence or absence of other vehicles traveling in the adjacent lane;
Other specific means for identifying a range on the road surface that is difficult for the driver of the vehicle to handle,
Vehicle-mounted drawing means for irradiating the road surface of the range specified by the specifying means from the vehicle and actually drawing the range on the road surface;
A driving assistance device comprising:   The driving assistance device according to claim 1, wherein the specific stage specifies a range that a driver of another vehicle cannot avoid.   The driving assistance device according to claim 1, wherein the specific step specifies a range that belongs to at least one of a range that a driver of another vehicle cannot avoid and a blind spot range of a driver of the other vehicle. A discriminating means for discriminating whether or not the own vehicle is in a range on the road surface that is difficult for the driver of the other vehicle to deal with is added.
The driving assistance device according to any one of claims 1 to 3, wherein when it is determined that the determination unit is present, the in-vehicle drawing unit draws the range. A determination means for determining whether or not the own vehicle enters a range on the road surface that is difficult for the driver of the other vehicle to deal with is added,
The driving assistance device according to any one of claims 1 to 3, wherein the in-vehicle drawing unit draws the range when it is determined that the determining unit enters.

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