JP2003080970A - Vehicle speed control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle speed control device capable of setting a proper target speed for the liking of an occupant concerning speed. SOLUTION: This device comprises a car speed detecting means 40 to detect actual car speed of a vehicle, and a target car speed setting means 20 to set target car speed of the vehicle, and it controls the vehicle in such a way as to make the actual car speed by the car speed detecting means 40 coincide with the target car speed by the target car speed setting means 20. It also comprises a map data storage means 31 storing road map data, a current position detecting means 80 to detect a current position of the vehicle, a drive information storage means 32 to store drive information when the vehicle drives on a prescribed road on a road map based on the current position detecting means 80, and a driving road condition detecting means 100 to detect conditions of a road on which the vehicle is driving. It is provided with a target car speed correcting means 11 to correct the target car speed based on stored data in the driving information storage means 32 and detection values by the driving road condition detecting means 100.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle speed control device. Specifically, it is an improvement so that an appropriate target speed can be set according to the occupant.

[0002]

2. Description of the Related Art A vehicle speed control device having a so-called cruise control (CC) function for adjusting a driving force of an engine so that a target vehicle speed is set by a driver is known. (Japanese Patent Application Laid-Open No. 9-288797). This cruise control function can be run at a predetermined speed without pressing the accelerator pedal, and can be released by operating the cancel switch or by pressing the brake pedal. Furthermore, in the vehicle speed control device described in the above publication, by utilizing the car navigation function,
The reference speed corresponding to the road on which the vehicle is currently traveling is read from the map data, the target vehicle speed of the vehicle is determined based on the reference speed, and speed control is also executed.

[0003]

However, in the technique disclosed in the above publication, the target speed is uniformly determined based on the reference speed stored in the map data, so that the target speed is appropriate according to the occupant's preference speed. There is a possibility that the target speed cannot be set. That is, even on the same road, elderly people and beginners may want to run at a relatively low speed, while skilled people who are used to driving a vehicle may want to run at a relatively high speed. With this technique, there is a possibility that an appropriate target speed cannot be set according to the occupant.

[0004]

A vehicle speed control device according to claim 1 of the present invention which solves the above problems, is a vehicle speed detecting means for detecting an actual vehicle speed of a vehicle, and a target vehicle speed for setting a target vehicle speed of the vehicle. A vehicle speed control device for controlling the vehicle so as to match the actual vehicle speed by the vehicle speed detection means with the target vehicle speed by the target vehicle speed setting means, map data storage means for storing road map data,
Based on the present position detecting means for detecting the present position of the vehicle, the map data storage means and the present position detecting means, traveling information for storing traveling information when the vehicle travels on a predetermined road on the road map. It is characterized by comprising a storage means and a target vehicle speed correction means for correcting the target vehicle speed based on the storage data of the travel information storage means. A vehicle speed control device according to a second aspect of the present invention for solving the above-mentioned problems is the vehicle speed control device according to the first aspect, wherein the traveling information storage means includes a frequency at which the vehicle has traveled on the predetermined road and the predetermined frequency. It is characterized in that the target vehicle speed correcting means corrects the target vehicle speed on the basis of the frequency and the vehicle speed while storing the vehicle speed when traveling on the road.

A vehicle speed control device according to a third aspect of the present invention which solves the above problems has a vehicle speed detecting means for detecting an actual vehicle speed of the vehicle and a target vehicle speed setting means for setting a target vehicle speed of the vehicle. A vehicle speed control device for controlling the vehicle so that the actual vehicle speed detected by the vehicle speed detecting means matches the target vehicle speed detected by the target vehicle speed setting means, the vehicle speed controlling device having a traveling road condition detecting means for detecting a traveling road condition of the vehicle A target vehicle speed correction means for correcting the target vehicle speed based on a detection result of the traveling road state detection means is provided. A vehicle speed control device according to a fourth aspect of the present invention which solves the above-mentioned problems is the vehicle speed control device according to the third aspect, wherein the traveling road state detecting means determines that the traveling road state corresponds to a highway. The target vehicle speed correcting means determines the target vehicle speed by a first predetermined value when the determining means determines that the traveling road condition corresponds to the highway. A first correction means for correcting the target vehicle speed to a second predetermined value lower than the first predetermined value when the determination means determines that the traveling road state is not equivalent to the highway. 2 correction means are provided.

A vehicle speed control device according to a fifth aspect of the present invention which solves the above problems has a vehicle speed detecting means for detecting the actual vehicle speeds of both vehicles and a target vehicle speed setting means for setting a target vehicle speed of the vehicle. A vehicle speed control device for controlling the vehicle so that the actual vehicle speed detected by the vehicle speed detecting means matches the target vehicle speed detected by the target vehicle speed setting means, and a map data storage means storing road map data and a current position of the vehicle are detected. The present position detecting means, the map data storage means, and the present position detecting means, based on the present position detecting means, the traveling information storage means for storing traveling information when the vehicle travels on a predetermined road on the road map; Having a traveling road condition detecting means for detecting a traveling road condition to travel, based on the stored data stored in the traveling information storage means and the detection value by the traveling road condition detecting means, Characterized in that a target vehicle speed correcting means for correcting the serial target vehicle speed.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings. [First Embodiment] FIG. 1 shows a block diagram of a vehicle speed control device according to a first embodiment of the present invention. As shown in FIG. 1, a vehicle speed control device according to this embodiment includes a vehicle control command unit 10 that is an electronic control unit (ECU) and a target vehicle speed correction unit 11, and also includes adaptive cruise control (ACC). ) Target vehicle speed setting means 20, memory 30,
The CCD camera 100 and the like are provided.

That is, the target vehicle speed setting means 20 is means for setting the target vehicle speed of the vehicle, and comprises a set switch 21, a vehicle speed setting switch 22 and a resume switch 23. The set switch 21 is a switch that sets the vehicle speed currently running as the target vehicle speed in the vehicle control command unit 10. The vehicle speed setting switch 22 is a switch that decelerates or accelerates the target vehicle speed set by the set switch 21 in the vehicle control command unit 10 by, for example, 5 km / hour. The resume switch 23 is a switch that resets the target vehicle speed at the time of release after the target vehicle speed is released, as the target vehicle speed when the resume switch 23 is operated.

Here, the ACC control, like the normal cruise control, if the driver sets the target vehicle speed, the engine driving force, braking force, etc. are set so that the actual vehicle speed becomes the target vehicle speed. In addition to the ability to adjust,
A function of traveling following a preceding vehicle by a millimeter wave radar or a laser radar (not shown) is added.
The target vehicle speed can be released by depressing the brake pedal as in the normal cruise control, or by operating a cancel switch (not shown).

To the vehicle control command unit 10, a target vehicle speed is set by the target vehicle speed setting means 20, and a vehicle speed sensor 40 as a vehicle speed detecting means for detecting the actual vehicle speed of the vehicle is connected, so that the actual vehicle speed of the vehicle is successively calculated. Is entered. The vehicle control command unit 10 controls the engine ECU 50, the A / TECU 60, and the brake 70 so that the actual vehicle speed detected by the vehicle speed sensor 40 matches the target vehicle speed set by the target vehicle speed setting means 20. The engine ECU 50 is an electronic control unit that controls the braking force of the engine, and the A / TE
The CU 60 is an electronic control device that controls the braking force of the automatic transmission. The vehicle control command unit 10 does not necessarily need to be connected to all of the engine ECU 50, the A / TECU 60, and the brake 70, and may be connected to any one of them so as to obtain a desired braking force, It may be connected to any two.

On the other hand, the memory 30 is composed of a map data storage means 31 and a travel information storage section 32. The map data storage means 31 and the GPS sensor 80, which is a current position detection means for detecting the current position of the vehicle, are connected to the travel information storage section 32. Here, the GPS sensor 80
Is a device that receives a signal from a GPS satellite and detects the current position of the vehicle. Then, the traveling information storage unit 32
Stores the travel information when the vehicle travels on a predetermined road on the road map based on the road map data stored in the map data storage means 31 and the current position of the vehicle detected by the GPS sensor 80. As the traveling information, for example,
As shown in a flowchart described later, the frequency with which the vehicle travels on the predetermined road and the vehicle speed when the vehicle travels on the predetermined road can be mentioned. When the travel information is output from the travel information storage unit 32 to the target vehicle speed correction means 11, the target vehicle speed correction means 11
Corrects the target vehicle speed on the basis of the traveling speed and the vehicle speed, which is the traveling information. Specifically, as shown in a flowchart described later, the upper limit value of the target vehicle speed is set based on the traveling information in the traveling information storage unit 32.

The correction of the target vehicle speed by the target vehicle speed correction means 11 is set in advance so that the target vehicle speed is not corrected above the legal speed. Further, instead of the GPS sensor 80, a device that detects the current position of the vehicle by autonomous navigation based on the detection results of the sensor that detects the vehicle speed and the direction sensor that detects the traveling direction of the vehicle may be used. You may use these together.

Further, an ID card detector 90 is connected to the traveling information storage section 32. ID card detector 90
By reading the traveling information different for each driver from the ID card, the traveling information storage unit 32 can store the traveling information corresponding to each of the plurality of drivers. Further, a CCD camera 100 is connected to the target vehicle speed correction means 11. This CCD camera 100
Is a traveling road condition detecting means for detecting a traveling road condition on which the vehicle travels. As a specific example, as shown in a flowchart described later, the road width W _r is measured based on the imaged traveling lane. When the road width W _r measured by the CCD camera 100 is output to the target vehicle speed correction means 11, the target vehicle speed correction means 11 corrects the target vehicle speed based on the road width W _r . Specifically, as shown in the flowchart described later, the highway / general road is discriminated based on the road width W _r , and the upper limit value of the target vehicle speed is set.
Here, an automobile exclusive road is not usually included in an expressway, but in the present invention, it is equivalent to an expressway including an automobile exclusive road.

FIG. 4 shows a flowchart for automatically setting the target speed by the above-described vehicle speed control device. First,
It is determined whether or not the ACC function is turned on (step S1). The ACC function can be turned on / off by a main switch (not shown). When the ACC function is OFF, the map data 31 detected by the GPS sensor 80
The current position above and the vehicle speed detected by the vehicle speed sensor 40 are recorded in the travel information storage unit 32 (step S2). That is, the roads stored in the map data 31 are divided on the map data 31 for each predetermined road (for example, every 10 km), and one section (for example, the first ward) of the predetermined roads into which the vehicle is divided is When passing, the average vehicle speed in the first ward is calculated. Then, the average vehicle speed is associated with the first zone and stored in the traveling information storage unit 32 as traveling information.

Next, it is determined whether or not the number recorded as the traveling information for each range classified as a predetermined road exceeds a certain threshold, that is, whether or not the road is frequently used (step S3). When the number recorded as driving information exceeds a certain threshold, that is, when the road is frequently used,
An average value is further calculated from the recorded average vehicle speed, and this speed (= average value) is recorded in the traveling information storage unit 32 as the driver's favorite vehicle speed (step S4). When the number recorded as the vehicle speed does not exceed a certain threshold, that is, when the road is infrequently used, it is not recorded as the driver's favorite vehicle speed.

On the other hand, when it is determined in step S1 that the ACC function is ON, it is determined whether or not the favorite vehicle speed is recorded at the current position (step S).
5). When the favorite vehicle speed is recorded at the current position,
The recorded favorite vehicle speed is set as the upper limit of the target vehicle speed that can be set by the occupant by the target vehicle speed correction unit 11 (step S6). Therefore, when the target vehicle speed set by the occupant exceeds the preference vehicle speed, the ACC control is performed with the preference vehicle speed as the target vehicle speed, and when the set target vehicle speed does not exceed the preference vehicle speed, the ACC follows the set target vehicle speed. Control is performed (step S7).

Further, when it is determined in step S5 that the favorite vehicle speed is not recorded at the current position, it is determined whether the current traveling position is traveling on the road of the map data (so-called car navigation map) 31. The determination is made (step S8). This is because the map data 31 is used to correct the target vehicle speed even when the favorite vehicle speed is not recorded at the current position. Continuing, the current driving position is map data 3
When it is determined that the vehicle is traveling on the first road, it is determined whether or not the vehicle is traveling on the highway based on the information in the map data 31 (step S9). When it is determined that the vehicle is traveling on a highway, V _{h is} set as the upper limit of the set target vehicle speed.
Is set (step S11), except for highways, that is,
When it is determined that the vehicle is traveling on an ordinary road, V _I is set as the upper limit of the set target vehicle speed (step S1).
0).

Here, V _h is an upper limit value of the vehicle speed recommended on a highway (hereinafter, recommended vehicle speed V _h ), and V _I is an upper limit value of the vehicle speed recommended on a general road (hereinafter, recommended vehicle speed V _I ). The recommended vehicle speed V _{h on} the expressway and the recommended vehicle speed V _{I on the} general road are, for example, 100 km / h and 100 km / h, respectively.
It can be 60 km / h. Therefore, on the highway, the target vehicle speed set by the occupant is equal to the recommended vehicle speed V _h.
When the vehicle speed exceeds ACC, the recommended vehicle speed _Vh is set as the target vehicle speed.
While performing control, the set target vehicle speed is the recommended vehicle speed _Vh.
If it does not exceed the value, ACC control is performed according to the set target vehicle speed (step S12). In addition, in general road,
When the set target vehicle speed exceeds the recommended vehicle speed V _I, as well as performing ACC control the recommended vehicle speed V _I as the target vehicle speed,
When the set target vehicle speed does not exceed the recommended vehicle speed V _I , ACC control is performed according to the set target vehicle speed (step S13).

When it is determined in step S8 that the current traveling position is not traveling on the road of the map data 31, the road width W _r is measured by the CCD camera 100 (step S14). In addition, when the current traveling position is not traveling on the road of the map data 31, specifically, there are cases where the map information is out of date and where the positional accuracy is poor. Then, it is determined whether or not the measured road width W _r exceeds a certain threshold (step S1).
5). That is, even if the map data 31 cannot be used because the favorite vehicle speed cannot be used and the current traveling position is not traveling on the road of the map data 31.
This is because the highway is generally used to have a wider lane width W _r than a general road, so that the target vehicle speed is corrected by distinguishing between the highway and the general road. The expressway has a lane width W _r of 3.8 m.
From the above, the threshold value of the lane width W _r for discriminating the highway / general road may be set to 3.8 m, for example.

When it is determined in step S15 that the lane width W _r is 3.8 m or more (highway), V _h is set as the upper limit of the set target vehicle speed (step S16), and the lane width W When it is determined that _r is 3.8 m or less (general road), V _I is set as the upper limit value of the set target vehicle speed (step S17). Therefore, in a case where the lane width W _r is determined to be not less than 3.8 m, when the target vehicle speed that is set exceeds the recommended vehicle speed V _h, as well as performs the ACC recommended vehicle speed V _h as the target vehicle speed performs ACC control according to the target vehicle speed is set when the target vehicle speed that is set does not exceed the recommended vehicle speed V _h (step S18). Further, ACC in step S15, in a case where the lane width W _r is determined to be equal to or less than 3.8 m, when the target vehicle speed that is set exceeds the recommended vehicle speed V _I, the recommended vehicle speed V _I as the target vehicle speed In addition to the control, when the set target vehicle speed does not exceed the recommended vehicle speed V _I , the ACC control is performed according to the set target vehicle speed (step S19). In addition, since the general road is usually 3.2 m or less in many cases, the threshold value of the lane width W _{r for} the highway / general road may be changed between 3.2 m and 3.8 m. .

As described above, according to the above-described vehicle speed control device, the target vehicle speed corresponding to the occupant's favorite speed is determined based on the traveling information when the vehicle actually travels on the predetermined road (steps S1 to S4). Can be corrected to (steps S5 to S7). That is, the traveling information storage unit 32 stores the frequency at which the vehicle travels on the predetermined road and the vehicle speed when the vehicle travels on the predetermined road, and corrects the target vehicle speed based on the frequency and the vehicle speed by the target vehicle speed correction means 11. Therefore, that is, since the target vehicle speed is limited by the favorite vehicle speed, the passenger's favorite vehicle speed can be accurately grasped, and the target vehicle speed can be appropriately corrected. As a result, for example,
Even on the same road, the elderly and beginners travel at a relatively low speed, so the preferred vehicle speed is relatively low, and the experienced people, who are used to driving a vehicle, travel at a relatively high speed, so the preferred speed is relatively high. , The respective preferred vehicle speeds are set as appropriate target speeds according to the occupants.

Further, in this embodiment, as a result of the target vehicle speed being limited by the favorite vehicle speed, when the driver mistakenly restarts the ACC control after canceling the ACC control, sudden acceleration can be prevented. This has the second effect.
For example, set the target vehicle speed to 100 km / h and ACC
When the ACC control is released after traveling on the expressway under the control, and the ACC control is restarted by mistakenly operating the resume switch 23 when the ACC control is released from the expressway to the general road, the previous target vehicle speed of 100 km / h is reached. There was a risk that the vehicle would suddenly accelerate on an ordinary road. However, in the present embodiment, since the upper limit of the target vehicle speed is limited by the favorite vehicle speed (steps S5 to S7), the vehicle is not accelerated more rapidly than the favorite vehicle speed, and the driver's operation error is avoided to ensure safe driving. Is possible.

Further, in the present embodiment, even if the favorite vehicle speed is not recorded at the current position, the map data 3
By using No. 1, even when map data cannot be used, the CCD camera 100 allows the road width W _r
Is measured, the highway / general road is discriminated, and the ACC control is performed so that the vehicle runs at the recommended vehicle speeds V _h and V _I or less according to the road condition (steps S8 to S13 and S14 to S1).
9) Further, the safety can be improved. In the above embodiment, the upper limit of the target vehicle speed is set to the preference vehicle speed when the preference vehicle speed is set on the predetermined road.
The ACC control may be performed by setting the favorite vehicle speed to the target vehicle speed as it is. In addition, map data 31 and CCD camera 10
When it is determined that the road currently being traveled is a road equivalent to a highway or a road equivalent to a general road according to 0, V _h ,
ACC control may be performed by directly setting V _I to the target vehicle speed. Further, in the present invention, correcting the target vehicle speed includes setting the upper limit value of the target vehicle speed as the favorite vehicle speed or the recommended vehicle speed, or setting the target vehicle speed itself as the favorite vehicle speed or the recommended vehicle speed.

[Second Embodiment] FIG. 2 shows a block diagram of a vehicle speed control device according to a second embodiment of the present invention.
The vehicle speed control device according to this embodiment is the vehicle speed control device shown in FIG. 1 in which the CCD camera 100 is omitted. Therefore, in this embodiment, the state of the road on which the vehicle is traveling is not detected.

Specifically, in the flowchart shown in FIG. 4, steps S14 to S19 are not performed. Also in this embodiment, as shown in FIG. 4, the target vehicle speed can be corrected based on the preference speed on the roads that are frequently used (steps 1 to S8), and the roads that are rarely used. Also in the above, the point that the upper limit of the target vehicle speed can be limited (steps 9 to S13) by discriminating the highway / general road by using the map data 31 and the recommended vehicle speeds V _I and V _h is described above. The same effect as the embodiment is obtained. In addition, CCD in the vehicle
Since it is not necessary to install a camera, the manufacturing process can be simplified and the cost can be reduced. In the first and second embodiments, it is determined whether or not the road on which the vehicle is currently traveling is at high speed based on the navigation information (steps S8 to S13), but the determination is not always necessary.

[Third Embodiment] FIG. 3 shows a block diagram of a vehicle speed control device according to a third embodiment of the present invention.
The vehicle speed control device according to this embodiment is the same as the vehicle speed control device shown in FIG.
0 and the ID card detector 90 are omitted. Therefore, in the present embodiment, the preference speed is not set according to the frequency of use, the CCD camera 100 detects the state of the road on which the vehicle is traveling, and the target vehicle speed correction means 11 is based on the detection result. Will correct the target vehicle speed.

As a concrete example, in the flow chart shown in FIG. 4, the ACC function is turned on in step S1.
If it is determined, as shown in steps S14 to S19, the CCD camera 100 measures the road width W _r , the target vehicle speed correction unit 11 and the road width W _r determine the highway / general road, and the recommended vehicle speed. The upper limit of the target vehicle speed can be limited by V _I and V _h . In this embodiment,
Since the condition of the traveling road on which the vehicle is traveling is detected, it is possible to correct the target vehicle speed to an appropriate value corresponding to the actual traveling road. Further, in the present embodiment, since the driver's favorite vehicle speed is not recorded and the map data 31 is not necessary, it is particularly effective for roads that are rarely used.
In addition, when the infrastructure information receiver is added to each of the first to third embodiments of the present invention, and when the infrastructure information receiver receives the speed regulation information sent from the infrastructure due to heavy rain or the like, The target speed correction unit 11 gives priority to other inputs and sets the upper limit value of the target vehicle speed or the target vehicle speed itself to the speed at the time of the speed regulation (for example, 50 km /
The configuration may be set to h).

[0028]

As described above in detail with reference to the embodiments, in the present invention, the target vehicle speed corresponding to the occupant's favorite speed is determined based on the traveling information when the vehicle actually travels on the predetermined road. Can be corrected. Further, since the target vehicle speed correcting means for correcting the target vehicle speed is provided based on the detection result of the traveling road state detecting means for detecting the traveling road state on which the vehicle travels, the target vehicle speed can be appropriately adjusted corresponding to the actual traveling road. Can be corrected. Furthermore, if the target vehicle speed is corrected based on the stored data stored in the travel information storage means and the value detected by the travel road condition detection means, an appropriate target corresponding to the occupant's preference speed and the actual travel path can be obtained. It can be corrected to the vehicle speed.

[Brief description of drawings]

FIG. 1 is a block diagram showing a vehicle speed control device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a vehicle speed control device according to a second embodiment of the present invention.

FIG. 3 is a block diagram showing a vehicle speed control device according to a third embodiment of the present invention.

FIG. 4 is a flowchart for automatically setting a target speed by the vehicle speed control device according to the first embodiment of the present invention.

[Explanation of symbols]

10 Vehicle control command section 11 Target vehicle speed correction unit 20 Target vehicle speed setting means 21 set switch 22 Vehicle speed setting switch 23 Resume switch 23 30 memory 40 vehicle speed sensor 50 engine ECU 60 A / TECU 70 brakes 80 GPS sensor 90 ID card detector 100 CCD camera

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 2F029 AA02 AB07 AB12 AC02 AC14                 3D044 AA03 AA04 AA14 AA21 AA24                       AA35 AB01 AC26 AC51 AC56                       AD02 AD16 AD21 AE21 BA30                       BB01 BD01                 3G093 AA01 BA07 BA23 CB10 DB05                       DB18 EA01 EB04 FA04 FB01                       FB02                 5H180 AA01 BB12 CC03 CC04 CC12                       CC14 FF05 FF22 FF27

Claims (5)

[Claims] 1. A vehicle speed detecting means for detecting an actual vehicle speed of a vehicle and a target vehicle speed setting means for setting a target vehicle speed of the vehicle, wherein the actual vehicle speed by the vehicle speed detecting means is a target vehicle speed by the target vehicle speed setting means. In a vehicle speed control device for controlling a vehicle so as to match with, a map data storage means for storing road map data, a current position detection means for detecting a current position of the vehicle, the map data storage means and the current position detection. And a target vehicle speed for correcting the target vehicle speed based on the data stored in the travel information storage means, the travel information storage means storing travel information when the vehicle travels on a predetermined road on the road map. A vehicle speed control device comprising: a correction unit. 2. The traveling information storage means stores a frequency of a vehicle traveling on the predetermined road and a vehicle speed when the vehicle travels on the predetermined road, and the target vehicle speed correction means is based on the frequency and the vehicle speed. The vehicle speed control device according to claim 1, wherein the target vehicle speed is corrected by the above. 3. A vehicle speed detecting means for detecting an actual vehicle speed of the vehicle, and a target vehicle speed setting means for setting a target vehicle speed of the vehicle, wherein the actual vehicle speed by the vehicle speed detecting means is a target vehicle speed by the target vehicle speed setting means. In the vehicle speed control device for controlling the vehicle so as to match the target vehicle speed based on the detection result of the traveling road condition detecting means, the traveling road condition detecting means for detecting the traveling road condition on which the vehicle travels. A vehicle speed control device comprising a target vehicle speed correction means for correcting the above. 4. The running road condition detecting means has a judging means for judging whether or not the running road condition corresponds to a highway, and the target vehicle speed correcting means carries out the running by the judging means. A first correcting the target vehicle speed to a first predetermined value when it is determined that the road condition corresponds to the highway;
A second correcting means for correcting the target vehicle speed to a second predetermined value lower than the first predetermined value when the correction means and the determining means determine that the traveling road condition is not equivalent to the highway;
The vehicle speed control device according to claim 3, further comprising a correction unit. 5. A vehicle speed detecting means for detecting an actual vehicle speed of the vehicle and a target vehicle speed setting means for setting a target vehicle speed of the vehicle, wherein the actual vehicle speed by the vehicle speed detecting means is a target vehicle speed by the target vehicle speed setting means. In a vehicle speed control device for controlling a vehicle so as to match with, a map data storage means for storing road map data, a current position detection means for detecting a current position of the vehicle, the map data storage means and the current position detection. Based on the means, a travel information storage means for storing travel information when the vehicle travels on a predetermined road on the road map, and a travel road condition detection means for detecting a travel road condition on which the vehicle travels, A target vehicle speed correction means for correcting the target vehicle speed based on the storage data stored in the travel information storage means and the detection value of the travel road state detection means. Vehicle speed control device.