JP2010117837A - Method and system for supporting maintenance and management of road facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To rapidly collect information necessary for maintenance and management of road facilities including an expressway in a laborsaving state. <P>SOLUTION: A small roadside unit having a communication function such as wireless and installed near sensors collects information measured by the sensors detecting states of a road facility, and according to instructions for a transmission time interval, a transmission information kind, or the like from an on-vehicle unit having a communication function such as wireless and loaded in an inspection vehicle, while the inspection vehicle travels near the roadside unit, the roadside unit transmits the information to the on-vehicle unit of the inspection vehicle. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a system that supports maintenance management of road facilities, and more particularly, to a system that supports road facility maintenance management by installing roadside units to which various sensors can be connected in a road facility.

  Systems that support road facility maintenance management, especially road surface maintenance management systems, are equipped with equipment that measures road surface conditions, such as GPS receivers, cameras, microphones, acoustic sensors, and vibration sensors, on inspection vehicles. When the inspection vehicle travels on the road, the system automatically measures the road surface condition, classifies and predicts road surface deterioration based on the measurement result, and notifies which area should be repaired when It is known (see, for example, Patent Document 1).

In addition, regarding structures such as bridges, there is also a method of notifying abnormalities by installing detection devices on structures such as bridges, detecting that structures such as bridges are displaced from predetermined positions due to vibration, deterioration, etc. It is known (see, for example, Patent Document 2).
JP-A-2005-115687 JP2001-4497

For the maintenance management of road equipment, it is important to grasp the situation of road equipment and to quickly and accurately identify the location to be repaired.
In the maintenance management of road equipment, for example, in Patent Document 1, a device for measuring the road surface state such as a sensor is mounted on the vehicle, and the road surface state is measured by the measuring device while traveling on the inspection vehicle. Based on the measurement information, a road repair plan is created in real time. However, in the technique of Patent Document 1, only information that can be measured from the equipment of the traveling inspection vehicle can be used, and bridges, tunnels, and earth structures (slopes such as cut and fill. Roads that include bridges, tunnels, earth structures, traffic control facilities, etc., because it is not possible to collect information on road surfaces other than road surfaces such as chopped slopes and piles filled with soil) Not enough information was collected as support information for equipment maintenance management.

  In addition, in the maintenance and management of road equipment, for structures such as bridges and buildings, for example, in Patent Document 2, a measuring device for detecting the movement is installed in a structure such as a bridge and a building. Although it is possible to detect the movement of a structure such as a building, it is necessary to notify the detected information and where it is. As a means for notifying, a method of checking by walking or a method of notifying by using communication means can be considered. However, inspection by walking is inefficient and takes time and costs to find a place to repair. On the other hand, the method using the communication means requires a high-output communication device when using a wide-area communication network such as a cellular phone, which increases the cost of the communication device and provides a power source that can withstand long-term use. It is necessary to prepare. Also, there is a method that uses road-to-vehicle communication such as Dedicated Short Range Communication (DSRC). However, it is necessary to perform wiring from the sensor to the place where the roadside unit is installed. Depending on the installation location, wiring may be difficult.

  An object of the present invention is to collect information for maintenance management economically and quickly also for road facilities other than road surfaces.

  The present invention has been devised in order to solve the above-described problems. A small road-side unit equipped with a communication function such as wireless communication is installed in the vicinity of a sensor for detecting the state of road equipment. This is a system for notifying the inspection vehicle of measurement information including abnormality information from the sensor when the inspection vehicle equipped with the in-vehicle unit having the communication function is running.

  In other words, in order to collect sufficient information as support information for road facility maintenance management, it is necessary to be able to install a sensor necessary for maintenance management of the road facility at a necessary location of the road facility to be maintained.

  On the other hand, there is a remarkable increase in the communicable distance of the wireless tag, which has been extended to about several tens of meters. In other words, information measured by sensors installed at various locations of road equipment is transmitted by a roadside unit connected to the sensor to an in-vehicle unit mounted on a moving body such as an automobile traveling in the vicinity (about several tens of meters). First, support information for road equipment maintenance management is collected in the in-vehicle unit, and then, if necessary, the base station (data collection station, which stores and manages various information for road equipment maintenance management) The base station accumulates and processes road facility maintenance management support information.

  As described above, in the method of transmitting information to a moving body such as an automobile that is traveling by using a wireless tag (roadside unit) whose communication range is significantly increased, information can be collected by the moving body that is traveling at high speed. For example, in order to collect support information for facility management of an expressway, the information can be collected by a car traveling on the expressway at high speed.

  Here, the road facilities are roads, bridges, tunnels, earth structures, traffic control facilities, and the like. Furthermore, the moving body is an automobile, a bus, a truck, a motorcycle, a train, a helicopter, an airplane, a ship, or the like.

Specifically, it is as follows.
In the roadside unit, measurement information from the sensor is processed by a central processing unit (CPU), and predetermined measurement information is stored in a memory. At the same time, it is determined whether the measurement information is abnormal according to a predetermined standard. When the measurement information is determined to be abnormal, preparation is made for notifying the in-vehicle unit of the abnormality.

That is, the detected exercising detection function call signal transmitted at the frequency f _c from the wireless device inspection vehicle. When detecting the roadside unit call signal, it uses the calling signal and different frequency f _r, transmits a number indicating the abnormality of their identification numbers and the sensor at regular intervals.

The traveling inspection vehicle can receive the communication of the roadside unit and know the identification number of the roadside unit that has notified the sensor abnormality and the abnormal state of the sensor.
Further, asset information is accumulated in the roadside unit, and the asset information of roadside units installed in various places of road facilities is economically managed by sending the asset information to the inspection vehicle that is traveling in the vicinity. It can be done quickly. Asset information is a unique number for identifying a roadside unit, and is written in each roadside unit.

  According to the present invention, the information measured by the sensor attached to the road equipment is automatically collected when the inspection vehicle travels in the vicinity by a communication means having a wide communicable distance such as wireless information including abnormality information. In addition, even if the inspection vehicle is moving at a high speed, it can be received by the inspection vehicle.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
An example of the system configuration of the present invention is shown in FIG.
The system includes a sensor 10, a roadside unit 20, an in-vehicle unit 30, and a base station 40, and a specific distance between the sensor 10 and the roadside unit 20, between the roadside unit 20 and the in-vehicle unit 30, and between the in-vehicle unit 30 and the base station 40 is specified. You may connect by a low electric power radio | wireless.

The sensor is installed in a place where a phenomenon can be detected in maintenance management of road facilities.
Sensors that support road facility maintenance management are the scientific principles of natural phenomena and the mechanical, electromagnetic, thermal, acoustic, and scientific properties of artifacts or their spatial and temporal information. Is a sensor that replaces the signal with another medium signal that is easy for humans and machines to handle. For example, as a sensor for measuring force, a strain gauge (strain gauge), a load cell (a load sensor combining a strain gauge with an object whose displacement amount is known), a semiconductor pressure sensor, etc., are sensors for measuring displacement. Are potentiometers, differential transformers, rotation angle sensors, linear encoders, rotary encoders, etc., sensors that measure position are optical position sensors (PSD), and sensors that measure speed are tachometers, laser Dopplers. Vibrometers, laser Doppler velocimeters, etc. are sensors that measure acceleration, acceleration sensors, earthquake sensors, etc., sensors that measure angular velocity are gyro sensors, and sensors that measure rotational speed are tachos. Generators, rotary encoders, etc. As an ultrasonic distance meter, a capacitance displacement meter, etc., as a sensor for measuring light, an optical sensor, a photoelectric element, a photodiode, etc. As a sensor for measuring liquid, a leak sensor (leak sensor) As a sensor for measuring magnetism, a liquid detection sensor (level sensor), etc., a magnetic sensor or the like, and as a sensor for measuring temperature, a contact sensor, a thermistor, a resistance temperature sensor, a thermocouple, a non-contact sensor Radiation thermometers, chemical concentration sensors, ion concentration sensors, gas concentration sensors, etc., voice sensors, microphones, etc., other sensors, time / clock, hardness, electric field, current Sensors such as voltage, radiation, flow rate, humidity, inclination, vibration, odor, and infrared can be used.

The state of the road facility or the surrounding environment may be measured by these sensors, and the measurement value collection period may be different depending on the type of sensor.
The sensor 10 and the roadside unit 20 may be physically integrated, or may be separated and connected to each other wirelessly or by wire.

  The roadside unit is installed in the vicinity of the sensor and at a place where communication with the in-vehicle unit of the inspection vehicle is easy. In addition, although the roadside unit has its own battery, the battery capacity is limited, and since the roadside unit is installed at various places in the runway facility, it is not easy to replace the battery. As shown in the figure, it is necessary to make effective use of the battery.

The collection and accumulation processing of road facility maintenance information according to the first embodiment of the present invention will be described.
An example of the configuration of the roadside unit 20 is shown in FIG.
The roadside unit 20 includes a sensor control unit 21 for controlling an external sensor, a sensor information storage unit 22 for storing information from the sensor 10, an asset information storage unit 23 for storing asset information, and a sensor Abnormality determination information storage unit 24 that stores abnormal information when the measurement value is abnormal, communication unit 25 that communicates abnormality detection information and storage information with the outside, and a call that receives a call signal for controlling the function of the communication unit 25 It includes a signal detection unit 26, a processing unit 27 that controls these, and an operating system (OS). Here, the communication means used by the communication unit 25 may be wireless or wired.

  The processing unit 27 specifies a sensor number (for example, sensor # 1) and requests the sensor control unit 21 to read out the measured value. The sensor control unit 21 reads the measured value of the corresponding sensor and notifies the processing unit 27 of the measured value (S11). The processing unit 27 determines whether or not the measured value is within a range defined for each sensor (S12). If the measured value is within the range, the sensor number, the measurement time, and the measured value are obtained from the sensor information. The storage unit 22 is notified. The sensor information storage unit 22 stores the notified information as sensor information storage information (S15). An example of the configuration of the sensor information accumulation information is shown in FIG. Here, the measurement time may be acquired from the OS 28, and may include all or part of the year / month / day / hour / minute / second.

  When the measurement value is outside the range defined for each sensor, the processing unit 27 notifies the determination abnormality information storage unit 24 of the sensor number and the measurement time as a determination abnormality. The determination abnormality information storage unit 24 stores the notified information as determination abnormality information storage information (S13).

  An example of the configuration of the determination abnormality information accumulation information is shown in FIG. Further, the processing unit 27 notifies the sensor information storage unit 22 of the sensor number, the measurement time, and the measurement value in the same manner as described above. The sensor information storage unit 22 stores the notified information as sensor information storage information.

  When the abnormality determination is performed, the processing unit 27 edits the format of the signal including the identification number (ID) of the roadside unit 20 and information indicating the abnormality state, and prepares to transmit to the in-vehicle unit 30 of the inspection vehicle. (S14).

Here, FIG. 5 shows an example of the format of a signal for notifying an abnormal situation.
An example of a sensor measurement value acquisition process flowchart in the roadside unit 20 is shown in FIG.

When there are a plurality of sensors connected to the roadside unit 20, a part of the roadside unit ID may indicate a sensor identification number.
An example of the configuration of the in-vehicle unit 30 is shown in FIG.

  The in-vehicle unit 30 mounted on the inspection vehicle includes a communication unit 31 that receives information from the roadside unit 20, a call signal transmission unit 32 that transmits a signal for starting transmission of the roadside unit 20, and sensor information received from the roadside unit. Sensor information storage unit 33 for storing, asset information storage unit 34 for storing asset information received from roadside units, anomaly information storage unit 35 for storing error signals received from roadside units, and a display unit for notifying the operator of abnormal information 36, an input unit 37 for the operator to operate, a map information storage unit 38 for storing road facility maps and design drawings, etc., and a processing unit 39 for controlling them, and an OS (not shown). . Here, the communication means used by the communication unit 31 may be wireless or wired. Further, a map or a design drawing of a road facility that is frequently used may be stored in the map information storage unit 38 in advance, or may not be stored in advance at all.

  In the in-vehicle unit 30 on the side of the inspection vehicle traveling on the road, the processing unit 39 specifies the sensor number and the transmission time interval, requests the sensor information accumulation information to the route unit 21 via the communication unit 31, and waits for a response. A timer is started (S21). Here, considering that there is a possibility that the information cannot reach the in-vehicle unit 30 normally by one transmission, the information can be received by the in-vehicle unit about three times within a reachable radio wave range. The transmission time interval is set to. The transmission time interval is a time interval at which the road unit 20 transmits sensor information accumulation information to the in-vehicle unit 30.

It is determined whether the response waiting timer is timed out (S22), and the following processing is performed until timed out.
For example, if the communicable distance of a roadside unit 20 installed at a height of 10 meters from a road, an automobile traveling at 80 km / h (speed of 22.2 meters per second), and a wireless tag (roadside unit) is 200 meters, The communicable distance of the wireless tag (roadside unit) is passed in 18 seconds. Therefore, the transmission time interval is set to a value that allows multiple transmissions of information within 18 seconds. Here, the relationship between the communicable distance of the roadside unit 20 and the speed of the automobile is shown in FIG.

Here, the transmission time interval will be described.
When the communicable distance x (m) from the roadside unit and the inspection vehicle speed v (m / s) are given, the receivable time t (s) = 2x / v. The communicable range is 2x because the other side can receive up to a distance x on the other side.

The transmission time interval τ for transmitting n times within this receivable time is τ <(2x) / (nv)
Thus, such a transmission time interval is set.
In the roadside unit 20, when the inspection vehicle approaches and the communication unit 25 receives a request for transmission of sensor information accumulation information specifying the sensor number and the transmission time interval, the communication unit 25 notifies the processing unit 27. The processing unit 27 reads sensor information accumulation information corresponding to the designated sensor number from the sensor information accumulation unit 22 and transmits the corresponding sensor information accumulation information to the in-vehicle unit 30 via the communication unit 25. The processing unit 27 performs the same processing at the designated transmission time interval. Here, an example of the format of the sensor information accumulation information to be transmitted is shown in FIG.

  In the in-vehicle unit 30, the corresponding sensor information accumulation information is notified to the processing unit 39 via the communication unit 31 (S23). When the notified value is outside the range specified for each sensor, the processing unit 39 ignores the value (S24), and the notified value is within the range specified for each sensor. In the case of the value, the roadside unit ID, sensor number, measurement time, and measurement value are notified to the sensor information storage unit 33. The sensor information storage unit 33 stores the notified information as sensor information storage information (S25), and stops the response waiting timer (S26). An example of the configuration of the sensor information accumulation information is shown in FIG. An example of a communication sequence related to transmission / reception of sensor information accumulation information is shown in FIG.

Here, the measurement time may include all or part of the year / month / day / hour / minute / second.
When the response waiting timer times out, non-reception is accumulated corresponding to the roadside unit and sensor number (S27).

An example of a sensor measurement value acquisition process flowchart in the in-vehicle unit 30 is shown in FIG.
Communication between the in-vehicle unit 30 and the roadside unit 20 in the present embodiment will be further described below.

Further, the in-vehicle unit 30 of the inspection vehicle, based on an instruction from the processor 39, the calling signal transmitting unit 32 transmits a calling signal by the frequency f _c.
In the route unit 21, when the inspection vehicle approaches, the call signal detection unit 26 detects the call signal. The call signal detection unit 26 notifies the processing unit 27 of the detection of the call signal. The processing unit 27 repeatedly transmits the prepared abnormality information at regular intervals via the communication unit.

Here, the frequency transmitted by the communication unit is set to a value different from f _c as f _r . The different frequencies are used for both signals in order to prevent interference, and the same frequency may be used when processing for preventing interference such as changing the modulation method is performed for both signals.

In addition, there is a method of detecting the calling signal of the roadside unit 20 intermittently in order to suppress the power consumption, or a method of not performing the abnormality determination until the abnormality determination is stopped.
Line unit, may also be more disposed near by a plurality of roadside units transmit at frequencies simultaneously f _r, sometimes causing interference between a plurality of roadside units. For this reason, the amount of information transmitted by the roadside unit is reduced and transmission is made at regular intervals to prevent interference.

Furthermore, by adding a carrier sense function to the roadside unit, when the roadside unit has detected that detects a carrier signal f _r is transmitting the other roadside unit is a transmission from the own roadside unit It is also possible to reduce interference by delaying it a little.

  In the in-vehicle unit 30, when approaching the installation location of the roadside unit 20, the processing unit 39 instructs the call signal sending unit 32 to send the call signal. The call signal transmission unit 32 transmits a call signal. In the in-vehicle unit 30, when an abnormal signal is received from the roadside unit 20, the processing unit 39 notifies the abnormal information storage unit 35 of the abnormal signal and also notifies the display unit 36. The abnormality information accumulation unit 35 accumulates abnormality signals. The display unit 36 displays the abnormality and notifies the operator. Here, if the processing unit 39 refers to the roadside unit ID included in the abnormality signal shown in FIG. 5 and extracts information on the installation location and notifies the display unit 36 of the information, the display unit 36 may display characters or maps. Etc. can be displayed. The processing unit 39 determines whether a map or a design drawing of the road facility where the in-vehicle unit is located is accumulated in the map information accumulation unit 38, and if the map information accumulation unit 38 accumulates the map information accumulation unit 38, a map or a design drawing is read out, and if it is not stored in the map information storage unit 38, the location of the inspection vehicle is notified to the base station 40 via the communication unit 31. By transmitting the design drawing to the inspection vehicle, the processing unit 39 acquires a map or a design drawing. Further, when the processing unit 39 analyzes the abnormal signal status to analyze the abnormal status and notifies the display unit 36 of the analysis result, the display unit 36 notifies the operator with characters or the like. For example, a map or a blueprint showing the current abnormal part is displayed.

  When the abnormal part can be identified, the person stops near the person, and the person approaches the vicinity of the roadside unit 20 and can acquire the detailed information accumulated in the roadside unit 20 wirelessly or by wire. When a person approaches the vicinity of the roadside unit 20 and acquires information wirelessly, an apparatus having the same configuration as that of the in-vehicle unit 30 can be used, but it is stored instead of an abnormal signal by changing the format of the calling signal. Detailed information accumulated in the information can be transmitted.

  Since the roadside unit has only to realize a communicable distance of about several tens of meters, a small and low-cost roadside unit can be realized. Moreover, since communication at the time of actual abnormality is transmitted only for a short time after receiving the call signal from the inspection vehicle, the battery of the roadside unit can be used effectively, and the battery can be operated for a long time. Furthermore, since the wiring from the sensor to the roadside unit may be short, the difficulty for wiring is reduced, and the sensor can be attached to any place required for maintenance management of road facilities.

The in-vehicle unit 30 may transmit the accumulated information to the base station 40 in real time via the network, or may automatically transmit the information to the base station 40 when the inspection vehicle returns to the garage.
When an abnormality is detected in the information measured by the sensor and collected, stored and transmitted by the roadside unit 20, the in-vehicle unit 30 notifies the base station 40 of the abnormality and a detailed inspection is performed manually. Also good.

  In addition, by analyzing and processing this information as basic data, or by planning the necessary work and carrying out the work, it is possible to quickly grasp the damage status and damage range in the event of a disaster such as an earthquake, and Predictions, accident prevention, and preventive maintenance are possible.

A collection and accumulation process of asset information of a rational facility according to the second embodiment of the present invention will be described.
In the in-vehicle unit 30 mounted on the traveling inspection vehicle, when the processing unit 39 requests asset information, the communication unit 31 requests the asset information from the road unit 20. Here, the roadside unit ID may be used as the asset information of the roadside unit.

  In the roadside unit 20, a request for asset information is notified to the processing unit 27 via the communication unit 25. The processing unit 27 reads the asset information from the asset information storage unit 23 and transmits the asset information to the in-vehicle unit 30 via the communication unit 25.

  The in-vehicle unit 30 notifies the processing unit 39 of asset information via the communication unit 31. The processing unit 39 stores the asset information in the asset information storage unit 34. The accumulated asset information is transmitted to the base station 40 in real time or when the inspection vehicle returns to the garage, and the base station 40 accumulates the asset information.

  Assets managed by base stations, etc. by automatically collecting asset information of nearby roadside units while traveling on an inspection vehicle without manually checking the presence or absence of roadside units at the site. The asset management of roadside units installed at various locations can be realized quickly and economically. The original book stores information such as installation date, repair date, and name for each roadside unit.

  The road facility maintenance management support method and system according to the present invention have been described above based on the embodiments. However, the embodiments are intended to facilitate understanding of the present invention and limit the present invention. It is not a thing. The present invention can be changed and improved without departing from the spirit of the claims, and the present invention naturally includes equivalents thereof.

It is a figure which shows an example of the system configuration | structure of this invention. It is a figure which shows an example of a structure of the roadside unit of this invention. It is a figure which shows an example of a structure of the sensor information storage information in a roadside unit. It is a figure which shows an example of a structure of the determination abnormality information storage information in a roadside unit. It is a figure which shows an example of the format of the signal which notifies the abnormal condition from a roadside unit to a vehicle-mounted unit. It is a figure which shows an example of the acquisition process flowchart of the sensor measurement value in a roadside unit. It is a figure which shows an example of a structure of a vehicle-mounted unit. It is a figure which shows the relationship between the communicable distance of a roadside unit, the speed of an inspection vehicle, etc. It is a figure which shows an example of the format of the signal which notifies sensor information storage information to a vehicle-mounted unit from a roadside unit. It is a figure which shows an example of a structure of the sensor information storage information in a vehicle-mounted unit. It is a figure which shows an example of the communication sequence concerning transmission / reception of sensor information storage information. It is a figure which shows an example of the acquisition process flowchart of the sensor measurement value in a vehicle-mounted unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Sensor 20 Roadside unit 21 Sensor control part sensor 22 Sensor information storage part 23 Asset information storage part 24 Abnormality determination information storage part 25 Communication part 26 Call signal detection part 27 Processing part 28 Operating system 30 In-vehicle unit 31 Communication part 32 Call signal transmission Unit 33 sensor information storage unit 34 asset information storage unit 35 abnormality information storage unit 36 display unit 37 input unit 38 map information storage unit 39 processing unit 40 base station

Claims (10)

In a road facility maintenance management support system that collects and accumulates information measured by sensors installed in road facilities,
The roadside unit collects information measured by the sensor connected to the roadside unit and stores it in a memory,
In response to the transmission request for the information from the in-vehicle unit mounted on the moving mobile body, the information is read from the memory and transmitted to the in-vehicle unit,
A road facility maintenance management support method for storing the information in a memory in the in-vehicle unit. The road facility maintenance management support method according to claim 1,
When the transmission request from the in-vehicle unit includes a time interval of information transmission and specification of an information type, when the road side unit is instructed, the road side unit stores information corresponding to the information type according to the time interval. Repeated transmission to the in-vehicle unit,
A road facility maintenance management support method for stopping transmission of the information thereafter when an in-vehicle unit instructs to stop transmission of the information. The road facility maintenance management support method according to claim 2,
The in-vehicle unit is a road facility maintenance management support method for determining the time interval so that an information transmission signal from the road unit can be received a plurality of times based on a communicable distance from the road unit and a traveling speed of the moving body. . The road facility maintenance management support method according to any one of claims 1 to 3,
The in-vehicle unit determines whether the value of the information received from the roadside unit is within a predetermined range, and stores the information in a memory if the value of the information is within a predetermined range. A road facility maintenance management support method that stores the information in the memory and stores information indicating an abnormality in the memory if the value is out of the range, or notifies the operator of the in-vehicle unit of the abnormality. In the road facility maintenance management support method according to any one of claims 1 to 4,
The in-vehicle unit stores a map or design drawing of a frequently used road facility in the memory of the in-vehicle unit in advance, and when the road facility map or design drawing is displayed on the screen, the in-vehicle unit is located. It is determined whether a map or design drawing of a road facility is stored in the memory, and if it is stored in the memory, it is read from the memory, and if not stored in the memory, a map of a road facility where the in-vehicle unit is located Or request a blueprint from the base station,
The base station transmits a map or design drawing of the road facility to the in-vehicle unit,
The in-vehicle unit is a road facility maintenance management support method for displaying the information or information indicating the abnormality on a screen showing the map or the design drawing.   The road facility maintenance management support method according to claim 1, wherein the sensor includes a sensor for supporting maintenance management of the road facility.   In the road facility maintenance management support method in which a roadside unit is installed in a road facility, when an in-vehicle unit mounted on a moving moving body requests asset information from the roadside unit, the roadside unit accumulates the roadside unit. A road facility maintenance management support method for transmitting asset information to the in-vehicle unit and storing the asset information in the in-vehicle unit.   8. The road facility maintenance management support method according to claim 1, wherein the in-vehicle unit transmits information stored in the memory or information indicating the accumulated abnormality to a base station, Is a road facility maintenance management support method for storing the stored information or the information indicating the stored abnormality in a memory. In a road facility maintenance management support system that collects and accumulates information measured by sensors installed in road facilities,
The information measured by the sensor is collected and stored in a memory, and in response to a request from the outside, the roadside unit that transmits the information to the outside requests the roadside unit to transmit the information, A road facility maintenance management support system, comprising: an in-vehicle unit mounted on a moving mobile body that stores the information in a memory when the information is received from a roadside unit. In the road facility maintenance management support system according to claim 9,
A road facility maintenance management support system including a base station that receives the information transmitted from the in-vehicle unit and stores the information.

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