JP2005351648A - Safe travel supporting method and system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safe travel supporting method and a safe travel supporting system contributing to safe travel by performing drive support on the basis of the acquisition of information on the conditions of a road on which a vehicle is presently driving. <P>SOLUTION: This safe travel supporting system comprises a DTG (digital tachograph) 1, a PDA 2, an IC memory card 3, a GPS card, and a GPS antenna. On the memory card, road information is recorded including dangerous area information on a travel route and maximum speed information on dangerous areas. The PDA 2 supports safe travel by finding the present position and traveling speed of the vehicle for delivery from a GPS signal acquired via the GPS card 4 and by notifying a driver of an overspeed in approaching a dangerous area on a delivery route (travel route) to urge the driver to reduce speed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a safe driving support method and a safe driving support system that provide support for safe driving based on acquisition of information related to a road condition where a vehicle is currently driving.

  Conventionally, an in-vehicle management device equipped with a communication module can obtain various types of information by accessing a database outside the vehicle. Such an in-vehicle management device is disclosed in, for example, Japanese Patent Laid-Open No. 8-221694.

FIG. 14 is an overall configuration diagram of the in-vehicle management device disclosed in the above-mentioned publication. In this in-vehicle management device, the GPS antenna 31 and the GPS receiver 32 receive radio waves from GPS satellites and detect the current location of the vehicle. Further, the mobile phone antenna 33, the mobile phone transceiver 34, and the modem 35 are used to access the information search DB (database) on the telephone line, and traffic information and weather information in a predetermined area including the detected current location. , Selectively get event information. The control device 37 causes the display device 38 to display information obtained from the information search DB in accordance with an input instruction from the input device 36.
JP-A-8-221694

  However, since the above-mentioned in-vehicle management device simply displays traffic information near the current location, it is up to the driver only to determine how to drive the vehicle in response to the displayed traffic information. It is not certain if it will be safe to drive.

  Accordingly, in view of the above-described conventional problems, the present invention provides a safe driving support method and a safe driving support system that can contribute to safe driving by providing driving support based on acquisition of information on the road conditions on which the vehicle is currently driving. The purpose is to do.

  The invention according to claim 1 is a safe driving support method for supporting safe driving of a vehicle traveling on a road, for dangerous area information indicating a dangerous area on the road, and for safe driving in the dangerous area. Road information including the highest speed information indicating the highest speed set in advance, obtaining position information indicating the current position of the vehicle traveling on the road, based on the road information and the position information, When the vehicle enters the danger area, if the traveling speed of the vehicle is equal to or higher than the maximum speed, the vehicle is notified to reduce the traveling speed below the maximum speed.

The invention according to claim 2 is a safe driving support system that supports safe driving of a vehicle traveling on a road, the risk area information indicating a dangerous area on a road on a predetermined driving route, and the danger Storage means for storing road information including maximum speed information indicating the maximum speed set in advance for safe driving in the area, reading means for reading the storage contents of the storage means, and a GPS signal transmitted from a GPS satellite GPS signal receiving means for receiving
Position calculating means for calculating the current position of the vehicle based on the GPS signal received by the GPS signal receiving means; Travel speed calculating means for calculating the traveling speed of the vehicle based on the GPS signal; A first determination unit that determines whether or not the current position of the vehicle calculated by the calculation unit is located in the danger area stored in the storage unit; and the first determination unit, If it is determined that the current position of the vehicle is located in the danger area, is the travel speed calculated by the travel speed calculation means equal to or greater than the maximum speed stored in the storage means? When the second determination means and the second determination means determine that the travel speed is equal to or higher than the maximum speed, the travel speed is reduced to the maximum speed or less. Characterized in that it comprises a notifying means for knowledge.

  According to a third aspect of the present invention, a digital tachograph for collecting vehicle operation information, the operation information collected by the digital tachograph, and a danger area indicating a danger area on a road on a preset travel route are stored. An IC memory card storing road information including information and maximum speed information indicating a maximum speed preset for safe driving in the danger area, and a portable information terminal connected to the digital tachograph so as to be communicable A GPS card that is attached to the portable information terminal and receives a GPS signal transmitted from a GPS satellite, and a GPS antenna connected to the GPS card, and the portable information terminal is received by the GPS card Position calculating means for calculating the current position of the vehicle based on the GPS signal, and based on the GPS signal. Whether or not the current position of the vehicle calculated by the position calculating means is within the danger area stored in the IC memory card. The travel speed calculated by the travel speed calculation means when the first determination means and the first determination means determine that the current position of the vehicle is located in the danger area. Is determined by the second determination means to determine whether or not the traveling speed is equal to or higher than the maximum speed stored in the IC memory card. And a notification means for notifying that the traveling speed is reduced to the maximum speed or less.

  According to a fourth aspect of the present invention, in the safe driving support system according to the third aspect, the danger area is set in a range from the straight line to a predetermined distance in two directions orthogonal to a straight line connecting any two points on the road. The second determination means determines whether the traveling speed is equal to or higher than the lowest highest speed among the highest speeds corresponding to each dangerous area when at least two dangerous areas overlap. It is characterized by determining.

  According to a fifth aspect of the present invention, in the safe driving support system according to the fourth aspect, the danger area is set by longitude and latitude.

  The invention according to claim 6 is the safe driving support system according to claim 3, wherein the IC memory card stores road information on a plurality of driving routes, and the portable information terminal further includes a plurality of driving routes. A travel route selecting means for selecting an arbitrary travel route is provided.

  According to the first and second aspects of the invention, in a dangerous place on the road on which the vehicle travels, it is notified that the vehicle should be decelerated to travel at a safe traveling speed, which leads to accident prevention.

  According to the third aspect of the present invention, a safe driving support system can be constructed using an existing digital tachograph and a portable information terminal.

  According to the fourth aspect of the present invention, it is possible to appropriately set a dangerous area where safe driving should be promoted.

  According to the fifth aspect of the present invention, it is possible to set a dangerous area with only longitude and latitude data without displaying a map.

  According to the sixth aspect of the present invention, an arbitrary travel route can be selected from a plurality of travel routes.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic configuration diagram showing the best mode of a safe driving support system for implementing a safe driving support method according to the present invention. For example, the safe driving support system is used by being mounted on a business vehicle such as a truck, a taxi, or a delivery vehicle. Here, a case where it is mounted on a delivery vehicle will be described as an example.

  In FIG. 1, the safe driving support system uses a digital tachograph (hereinafter referred to as DTG) 1 and an IC memory card 3 which is an operation card, which constitute an existing vehicle operation information collecting device for analyzing the operation status of the vehicle. A PDA (Personal Digital Assistance; portable information terminal) 2 that is communicably connected to the DTG 1 and a GPS card 4 and a GPS antenna 5 that are connected to the PDA 2 are added.

  In summary, the safe driving support system obtains the current position and traveling speed of the delivery vehicle from the GPS signal obtained via the GPS card 4, and asks the driver to the dangerous area on the road on the delivery route (travel route). By notifying the approach speed over and prompting deceleration, safe driving is supported. Moreover, GPS data can be recorded on the IC memory card 3, and a travel route and a dangerous area can be confirmed at the office.

  The DTG 1 monitors operation information such as a traveling speed and a traveling distance that change every moment when the delivery vehicle travels, converts the operation information signal obtained by the monitoring into digital data, and outputs the digital data. This DTG1 also serves as reading means in the claims. Further, the DTG 1 has a card slot 1a, and an IC memory card 3 as an operation card is inserted into the card slot, and the above-described digital data is written into the inserted IC memory card 3. The written IC memory card 3 is ejected from the DTG 1 and inserted into an analysis device disposed in an office that manages the delivery vehicle, and the digital data written in the IC memory card 3 is analyzed. Thereby, the operation status of the delivery vehicle is grasped.

  The IC memory card 3 has a recording area including a digital octopus area in which digital data of operation information is recorded. The IC memory card 3 records data for safe driving support. Used as a PDA data area. Data for safe driving support is downloaded in advance in the PDA data area. This download is performed using an analysis device (or other computer device) installed in the office.

  The data for safe driving support is data indicating road information regarding roads in the delivery (driving) route. This road information includes dangerous area information set in advance as information indicating a dangerous place (for example, a corner or a curve) when traveling on a road on a delivery (traveling) route, and can travel without danger in the dangerous area. And maximum speed information set in advance as information indicating the maximum speed set in advance as the correct speed.

  The PDA 2 is generally a computer device having a size that fits in the palm of the hand, and functions as a position calculation means, a traveling speed calculation means, a first determination means, a second determination means, and a notification means in the claims. The PDA 2 has a card slot (not shown) on its side, and a GPS card 4 that is a card-type GPS receiver is inserted into this card slot. A GPS antenna 5 is connected to the GPS card 4, and a GPS signal transmitted from a GPS satellite (not shown) can be received. The GPS card 4 and the GPS antenna 5 function as GPS signal receiving means in the claims.

  Next, FIG. 2 is a block diagram illustrating a configuration example of the DTG 1. The DTG 1 is a central processing unit (CPU) 11 that performs various processes such as operation information collection processing and control according to a predetermined program, a ROM 12 that is a read-only memory storing programs for the CPU 11, and the DTG 1 An electrically erasable / rewritable read-only memory (EEPROM) 13 capable of retaining stored contents even during the power-off state of the CPU, and storing various data and having an area necessary for processing operations of the CPU 11 A RAM 14 or the like.

  The DTG 1 further includes an operation unit 15, a display unit 16, a communication module 17, a card insertion unit 18, and the like, which are each connected to the CPU 11. In addition, a sensor 19 corresponding to a vehicle speed sensor or the like is also connected to the CPU 11.

  The operation unit 15 includes a plurality of operation switches (not shown) provided on the front panel of the DTG 1 or the like. The display unit 16 includes an LCD (Liquid Crystal Display) or the like, and performs various displays based on display output from the CPU 11. The communication module 17 is for performing bidirectional communication with the PDA 2.

  The card insertion section 18 functions as a reading means in claims, and writes / reads data to / from the IC memory card 3 inserted in the card slot 1a provided on the front panel of the DTG 1. The insertion of the IC memory card 3 into the card slot 1a is performed manually, and the ejection is automatically performed by the ejection mechanism (not shown) of the card insertion unit 18 in accordance with the operation of the ejection key (not shown) provided on the operation unit 15. To do.

  Next, FIG. 3 is a block diagram illustrating a configuration example of the PDA 2. The PDA 2 is a central processing unit (CPU) 21 that performs various processes and controls such as safe driving support processing according to a predetermined program, a ROM 22 that is a read-only memory that stores programs for the CPU 21, and the like. An electrically erasable / rewritable read-only memory (EEPROM) 23 that can retain the stored contents even while the power is off, stores various data, and has an area necessary for the processing operation of the CPU 21. It has RAM24 etc. which are memory. The CPU 21 functions as position calculation means, travel speed calculation means, first determination means, and second determination means in the claims.

  The PDA 2 further includes an operation unit 25, a display unit 26, an audio output unit 27, a communication module 28, a card insertion unit 29, and the like, each of which is connected to the CPU 21.

  The operation unit 25 includes a plurality of operation switches (not shown) provided on the front panel of the PDA 2 or the like. The display unit 26 includes an LCD (Liquid Crystal Display) or the like, and performs various displays based on display output from the CPU 21. The audio output unit 27 includes a speaker, and performs audio output based on the supply of the notification signal from the CPU 21. The audio output unit 27 functions as a notification unit in the claims. The communication module 28 is for performing bidirectional communication with the DTG 1.

  The card insertion part 29 reads GPS data with respect to the GPS card 4 inserted in the card slot provided in the side part of PDA1. The GPS card 4 is manually attached to and detached from the card slot.

  Next, the usage method and operation | movement of the safe driving assistance system which has the above-mentioned structure are demonstrated.

First, attachment of the safe driving support system to a delivery vehicle will be described. This attachment is performed according to the following procedure.
(1) Insert the power adapter (not shown) of the PDA 2 into the cigarette lighter socket of the delivery vehicle.
(2) Insert the other power plug of the power adapter into the PDA 2 body.
(3) The GPS antenna 5 is attached to the ceiling of the delivery vehicle.
(4) The GPS antenna 5 cord is pulled into the vehicle and inserted into the GPS card 4.
(5) Insert the GPS card 4 into the card slot of the PDA 2 body.
(6) The PDA 2 body is fixed at a stable position in the vehicle.

Next, the flow of operation will be described.
1. Before operation start (1) Data for safe driving support is written in the PDA data area of the IC memory card 3 using an analysis device (or other computer system) installed in the office. This data includes route data and position data.

  Route data is a group list table of position data. This table defines a route code for identifying a delivery (running) route and a route name. FIG. 4 is a diagram showing a format of route data. By selecting a delivery (travel) route on the PDA 2 side as will be described later, a group of dangerous position data indicating a dangerous position in the selected delivery (travel) route is determined, and only the data of the group is monitored. Is done.

  The position data is data representing the speed monitoring range with two longitudes and latitudes. There are no directions at the two points, and as shown in FIG. 5, the data of these two points is used in two directions orthogonal to the straight line connecting the two points designated on the road, from the straight line to a predetermined distance, for example, in latitude and longitude units. The range up to 1 second above is set as the danger area. As the dangerous area, a plurality of dangerous locations on the delivery (running) route can be designated.

  FIG. 6 is a diagram showing a format of position data. The position data includes a route code, a name, a maximum speed, a start point latitude, a start point longitude, an end point latitude, and an end point longitude.

2. At the time of delivery (1) The engine of the delivery vehicle is started, and the IC memory card 3 is inserted into the card slot 1a of the DTG 1.
(2) PDA2 selects the forward route (going) to be traveled.
(3) Start operation.

3. During operation (1) During traveling, travel according to voice instructions so that no notification is given.
(2) When arriving at the destination, select the return route (return).
(3) Start return operation.

4). (1) Tap an end button (not shown) provided on the operation unit 25 of the PDA 2. DTG1 is received (as before). Thereafter, the power supply of the PDA 2 is also turned off.
(2) The IC memory card 3 is ejected from the card slot 1a of the DTG 1.
(3) The data recorded on the IC memory card 3 is read by an analysis device in the office. After that, the operation information is printed out on a form. When a notification event has occurred in the safe driving support function, this notification event information is also output to a form or the like. Finally, all the recorded contents of the IC memory card 3 are cleared. (Use this cleared card for the next issue.)

  Next, operations performed on the delivery vehicle side in the above-described operational flow will be described.

  The PDA 2 is linked to the ignition of the delivery vehicle, and starts simultaneously with the start of the engine and the DTG 1.

  After the start of the safe driving support system, the main screen is displayed on the display unit 26 of the PDA 2 as shown in FIG. The current speed is displayed in the “speed” column of this main screen, and the maximum speed preset in the dangerous area is displayed in the “designated” column when entering the dangerous area. In the “Route” column, “None” is displayed when no route is selected, and the name of the currently selected route is displayed after the route is selected. In the “DTG” column, “not connected” is displayed when the PDA 2 and the DTG 1 are not connected, and the “incoming / outgoing state of the DTG 1” is displayed when the PDA 2 and the DTG 1 are connected. Is displayed. The “GPS” column displays the GPS reception status, the “latitude” column displays the latitude value calculated based on the GPS signal, and the “longitude” column calculates based on the GPS signal. The longitude value is displayed, and the GPS time is displayed in the “time” field. To end the safe driving support system, tap the end button. Turn off the power when finished.

  Before starting operation, a route change button (see FIG. 7) provided on the operation unit 25 of the PDA 2 is tapped to select a route to be traveled from now on.

  FIG. 8 shows an example of a route selection screen displayed on the display 26. On the route selection screen, a registered route list is displayed. When the route name is tapped, the name is highlighted and selected. If there is a route that is not visible on the screen, you can scroll up and down to display it.

  A route is selected by selecting a route name and tapping an OK button on the display screen of FIG. Then, the main screen displaying the selected route is displayed. Tap the cancel button to return to the main screen without changing the route.

  FIG. 9 shows an example of a change in the screen display of the display 26 at the time of route selection, and the route selection screen on the left side in the drawing becomes the main screen on the right side in the drawing after the route selection.

  Next, during operation, only the main screen shown in FIG. 7 is displayed on the display 26 of the PDA 2, and no operation is required. While the system is starting up, the driving situation is constantly monitored. In addition, the display of each column of the main screen is appropriately changed according to the operation status, and a voice message is generated from the voice output unit 27 of the PDA 2.

  FIG. 10 shows an example of a change in the screen display of the indicator 26 when entering the dangerous area, and the main screen when entering the dangerous area on the left side in the figure becomes the main screen on the right side in the figure after exceeding the maximum speed. A voice message warning that the maximum speed has been exceeded is generated from the voice output unit 27).

The following is an example of a voice message.
(Example 1) Voice message “Confirmed delivery” PDA2 monitors the status of DTG1 immediately after startup and every minute. When communicating with DTG1 and confirming delivery, this voice message is generated, and travel recording to DTG1 is started every minute.
(Example 2) Voice message “Inside the monitoring area”: This occurs when the user enters the position specified in the danger area.
(Example 3) Voice message “Decelerate to less than XX km.” This occurs when the vehicle travels over the specified maximum speed while traveling in the position specified in the danger area. This voice message prompts you to safely reduce the speed of the vehicle. When the DTG 1 is connected during delivery, the occurrence position and the like are recorded in the PDA data area of the IC memory card 3.
(Example 4) Voice message "Route information has been updated" ... If the dangerous area data written in the IC memory card 3 and the dangerous area data stored in the PDA 2 are different, Hazardous area data is automatically downloaded. When the data is updated, the currently selected route selection is canceled and “unset: route updated” is displayed in the “route” column.

  Tap the end button on the main screen after the operation ends (when entering the warehouse). When the DTG 1 is connected, the operation is the same as the warehousing process (end button). Thereafter, the power of the PDA 2 is turned off.

  Next, the mechanism of alarm generation will be described. The dangerous position data is downloaded from the IC memory card 3 at the time of delivery, and is recorded in the EEPROM 23 of the PDA 2 via the DTG 1. Thereafter, the CPU 21 of the PDA 2 calculates the current position and traveling speed of the delivery vehicle based on the GPS signal from the GPS card 4. Next, the CPU 21 compares the calculated current position with the dangerous position data recorded in the EEPROM 23, and determines whether or not the current position is in the dangerous area defined by the dangerous position data.

  When it is determined that the current position is in the dangerous area, the CPU 21 compares the traveling speed with the maximum speed set for the dangerous area to determine whether the traveling speed is equal to or higher than the maximum speed. judge.

  When the traveling speed is equal to or higher than the maximum speed, a display message and a voice message prompting the user to reduce the traveling speed below the maximum speed are output from the display unit 26 and the voice output unit 27, respectively, and notified to the driver. The

  FIG. 11 is a diagram illustrating an example in which dangerous areas are continuously set. For example, FIG. 11 shows a case where danger areas are continuously set on a curved road in a highway junction (JCT). The first danger area is set at a maximum speed of 60 km / h for a distance of 100 m, and the subsequent danger areas are respectively a maximum speed of 40 m / h for a distance of 100 m and a maximum speed of 30 m / h for a distance of 130 m, respectively. The maximum speed is set to 30 m / h during a distance of 130 m. When the traveling speed of the delivery vehicle that has entered the danger area is greater than or equal to the respective maximum speed when entering each danger area, a notification that prompts deceleration is issued.

Next, FIG. 12 is a diagram illustrating an example of processing executed when entering a certain danger area. In this danger area, it is assumed that the maximum speed (threshold value) is set to 60 km / h. The GPS card 4 receives a GPS signal every second, and the CPU 21 executes a dangerous area search process in the following order for each reception.
(1) Each time a GPS signal is received, the current position of the delivery vehicle is calculated, and the traveling speed is calculated based on the current position data and the position data one second before. The maximum speed (60 km / h) recorded in the dangerous position data is compared with the current travel speed. If the travel speed is equal to or higher than the maximum speed, the process proceeds to the next (2). When the traveling speed is lower than the maximum speed, the next dangerous position data is compared.
(2) A range up to a predetermined distance from the straight line in the direction perpendicular to the straight line connecting the two starting points and the end point included in the dangerous position data, for example, up to 1 second on a longitude and latitude unit is obtained.
(3) Among all the dangerous position data, the dangerous position data with the lowest maximum speed is returned as a detection result.

As shown in FIG. 13, there is an area where a plurality of danger areas overlap (shaded area in the figure), and when the current position of the delivery vehicle is in this area, the highest speed of which danger area is driven It is necessary to decide whether to compare with speed. In such a case, it is possible to travel more safely by determining the lowest maximum speed in the overlapping danger areas as a comparison target.
(4) When a delivery vehicle enters the area registered in the dangerous position master, the voice output unit 27 generates a voice message “Inside the monitored area”.
(5) Thereafter, when the vehicle travels at a speed higher than the maximum speed, the voice output unit 27 generates a voice message “Decelerate to 60 km or less”.

  Thus, according to the present invention, it is notified that the vehicle travels at a safe traveling speed in a dangerous place on the traveling road, which leads to accident prevention.

  As described above, the best mode of the present invention has been described, but the present invention is not limited to this, and various modifications and applications are possible.

  For example, in the above-described best mode, the safe driving support system includes DTG1 and PDA2 that are communicably connected, but instead, the function of PDA2 is incorporated into DTG1, and DTG1, IC memory card 3, A GPS card 4 and a GPS antenna 5 may be used.

  In the above-described best mode, the danger area is set as a range from the straight line to a predetermined distance in two directions orthogonal to the straight line connecting the two points designated on the road, for example, up to 1 second on the longitude / latitude unit. However, the length of the straight line and the predetermined distance can be set arbitrarily, for example, it can be set to include multiple roads within the range, and can also be set to include the entire region It is.

It is a schematic block diagram which shows the best form of the safe driving assistance system which enforces the safe driving assistance method which concerns on this invention. It is a block diagram which shows the structural example of DTG (digital tachograph) in the system of FIG. It is a block diagram which shows the structural example of PDA in the system of FIG. It is a figure which shows the format of route data. It is a figure which shows the setting of a danger area. It is a figure which shows the format of position data. It is a figure which shows the main screen of a display. It is a figure which shows the route selection screen of a display. It is a figure which shows the example of a change of the screen display of the indicator at the time of route selection. It is a figure which shows the example of a change of the screen display of the indicator at the time of danger area approach. It is a figure which shows the example in which the danger area is set continuously. It is a figure explaining the example of a process performed when approaching a certain danger area. It is a figure which shows the case where there exists an area | region where several danger areas have overlapped. It is a whole block diagram of the conventional vehicle-mounted management apparatus.

Explanation of symbols

1 DTG (digital tachograph)
2 PDA (Personal Digital Assistant)
3 IC memory card 4 GPS card 5 GPS antenna

Claims (6)

A safe driving support method for supporting safe driving of a vehicle traveling on a road,
Road information including dangerous area information indicating a dangerous area on the road and maximum speed information indicating a maximum speed set in advance for safe driving in the dangerous area;
Obtaining position information indicating a current position of the vehicle traveling on the road;
Based on the road information and the position information, if the traveling speed of the vehicle is equal to or higher than the maximum speed when the vehicle enters the dangerous area, the traveling speed is reduced to the maximum speed or less. A safe driving support method characterized by: A safe driving support system for supporting safe driving of a vehicle traveling on a road,
Storage means for storing road information including danger area information indicating a danger area on a road on a preset travel route and maximum speed information indicating a maximum speed preset for safe driving in the danger area; ,
Reading means for reading the storage content of the storage means;
GPS signal receiving means for receiving GPS signals transmitted from GPS satellites;
Position calculating means for calculating the current position of the vehicle based on the GPS signal received by the GPS signal receiving means;
Traveling speed calculating means for calculating the traveling speed of the vehicle based on the GPS signal;
First determination means for determining whether or not the current position of the vehicle calculated by the position calculation means is located within the danger area stored in the storage means;
When it is determined by the first determination means that the current position of the vehicle is located in the danger area, the travel speed calculated by the travel speed calculation means is stored in the storage means. Second determining means for determining whether or not the speed is equal to or higher than the maximum speed;
When the second determination means determines that the travel speed is equal to or higher than the maximum speed, the second determination means includes notification means for notifying the vehicle to reduce the travel speed to be equal to or lower than the maximum speed. Safe driving support system. Digital tachograph that collects vehicle operation information,
The operation information collected by the digital tachograph is stored, dangerous area information indicating a dangerous area on a road on a preset driving route, and a maximum speed set in advance for safe driving in the dangerous area. An IC memory card storing road information including maximum speed information shown;
A portable information terminal communicably connected to the digital tachograph;
A GPS card that is attached to the portable information terminal and receives a GPS signal transmitted from a GPS satellite;
A GPS antenna connected to the GPS card,
The portable information terminal includes a position calculating unit that calculates a current position of the vehicle based on a GPS signal received by the GPS card, and a traveling speed calculating unit that calculates a traveling speed of the vehicle based on the GPS signal. And first determination means for determining whether or not the current position of the vehicle calculated by the position calculation means is located in a danger area stored in the IC memory card; and When the determination means determines that the current position of the vehicle is located in the danger area, the travel speed calculated by the travel speed calculation means is stored in the IC memory card. When the second determination means for determining whether or not the speed is equal to or higher than the speed and the second determination means determine that the travel speed is equal to or higher than the maximum speed, the travel speed is Safe driving support system characterized by comprising a notification means for notifying to slow the speed or less. In the safe driving support system according to claim 3,
The danger area is set in a range from the straight line to a predetermined distance in two directions orthogonal to a straight line connecting any two points on the road,
The second determination means determines whether or not the traveling speed is equal to or higher than the lowest highest speed among the highest speeds corresponding to each dangerous area when at least two dangerous areas overlap. A safe driving support system characterized by that. In the safe driving support system according to claim 4,
The safe driving support system, wherein the danger area is set by longitude and latitude. In the safe driving support system according to claim 3,
The IC memory card stores road information on a plurality of travel routes,
The portable information terminal further includes a travel route selection means for selecting an arbitrary travel route from a plurality of travel routes.

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