JPH0558302A - Railroad crossing control device - Google Patents

Abstract

PURPOSE:To provide a crossing control device of a point control system that can control a crossing in a station yard having a complicated line layout and interlocking conditions, with a simple, clear, versatile, and highly safe logic. CONSTITUTION:A railroad crossing control system has a computer 1 and vehicle detecting devices 21-23, and provides a crossing 3 located in or near a station yard with crossing control. The first vehicle detecting device 21 detects a vehicle 4 at an alarm start position P1 while the second vehicle detecting device 23 detects the vehicle 4 at an alarm stop position P2. The computer 1 receives an alarm start position condition from the first vehicle detecting devices 21 and 22 and receives an alarm stop position condition from the second vehicle detecting device 23, and starts a crossing alarm when the alarm start position condition is received and continues the alarm until the alarm stop position condition is received.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a railroad crossing control device for alarming a railroad crossing provided in or near a station.

[0002]

2. Description of the Related Art A railroad crossing provided in or near a station has an alarm controlled by an interlocking condition which is a constituent condition of a vehicle route such as a traffic signal or a point of a station and a vehicle position condition where the vehicle exists. It Among them, the vehicle position condition is conventionally obtained by a continuous track circuit system. As is well known, the continuous track circuit system detects whether or not a vehicle is present in an alarm section from an alarm start position to an alarm stop position based on the presence or absence of a track circuit short circuit due to a vehicle axle.

[0003]

However, the continuous track circuit system has the following problems. (A) In the continuous track circuit system, the track circuit detects the presence of a vehicle and is a condition for starting an alarm and also a condition for stopping the alarm. In theory, the condition for stopping the alarm is always awaited. It is in a state. Therefore, the track circuit
Once the behavior is illegal and the vehicle is present,
If a state in which the presence of the vehicle cannot be detected occurs, the alarm is interrupted while the vehicle is traveling to the railroad crossing. The railroad crossings provided in or near the station have a short distance from the start of the vehicle to the railroad crossing.Therefore, if the above-mentioned alarm interruption occurs, it will be extremely dangerous for transportation facilities passing through the railroad crossing. It becomes a state. Unauthorized operation of vehicle detection is caused by lifting of a wheel, the brake shoe powder adhering to the rail surface to form a semiconductor film, and the like, which tends to occur as the vehicle becomes lighter and shorter. (B) In the actual level crossing control electric circuit, a time element circuit that can cover a temporary illegal operation of the track circuit is added to prevent the alarm interruption. However, the illegal operation exceeds the set time element. If it continues, it is not an essential measure, such as the alarm interruption cannot be prevented. (C) If any of a plurality of continuous track circuits has broken down and a vehicle does not exist even though the vehicle does not exist, the alarm does not stop even if the vehicle finishes passing the railroad crossing, Interfere with other traffic through the railroad crossing. (D) In the station yard, many track circuits exist between the alarm start position and the alarm stop position, and point conditions exist. The larger the station, the more
Conditions become complicated. As the number of conditions increases, as a matter of course, the number of input parts, the number of test steps, the cost, and the probability of occurrence of unauthorized operation increase.

Therefore, a first object of the present invention is to solve the above-mentioned conventional problems and to make a railroad crossing in a station with complicated track wiring and interlocking conditions simple, clear and versatile and highly safe. It is an object of the present invention to provide a railroad crossing control device of a point control system that can be controlled by logic and conditions.

A second object of the present invention is to provide a railroad crossing control device of a point control type when a vehicle is on a home truck and the road is emptied or rerouted. It is to provide a level crossing control device that can be stopped.

A third object of the present invention is to provide a crossing control system of a point control system, in which even if a plurality of vehicles enter the alarm section, the number of the vehicles is managed and the crossing control suitable for the number of vehicles can be performed. It is to provide a railroad crossing control device.

A fourth object of the present invention is to provide a crossing control device of a point control system, which detects the crossing operation of a vehicle even when the vehicle is going backwards, and executes the crossing control suitable for the number of vehicles existing in the warning section. The purpose of the present invention is to provide a level crossing control device that can be carried out.

A fifth object of the present invention is to provide a railroad crossing control apparatus capable of performing railroad crossing warning control even when a vehicle detection device arranged at an alarm start position fails in a point control type railroad crossing control apparatus. Is to provide.

[0009]

[Means for Solving the Problem] To solve the first problem,
The present invention is a railroad crossing control device having a computer and a vehicle detection device, wherein the vehicle detection device includes a first vehicle detection device and a second vehicle detection device, and the first vehicle detection device. The device detects the vehicle at the alarm start position, and the second
The vehicle detection device detects the vehicle at the alarm stop position, the computer is input the interlocking condition and the vehicle position condition in the station yard, the vehicle position condition includes an alarm start position condition and an alarm stop position condition, The alarm start position condition is input from the first vehicle detection device, the alarm stop position condition is input from the second vehicle detection device, the alarm start position condition and a required interlocking condition are input, and a level crossing alarm is issued. And a railroad crossing control output for continuing the railroad crossing alarm until the alarm stop position condition is input is generated.

In order to solve the second problem, a virtual railroad crossing is assumed at the position of the departure signal installed in the station yard, and the computer uses the virtual alarm railroad crossing from the vehicle stop position to the virtual railroad crossing as an outside warning section. To the crossing as an inner warning section, warning control for the virtual crossing in the outer warning section and warning control for the crossing in the inner warning section are individually performed, and warning control for both sections is performed. It is characterized in that the alarm control of the railroad crossing is performed by the logical sum of the outputs.

To solve the third problem, the computer is
When the vehicle passes the alarm start position, the number of vehicles is added based on the signal of the first vehicle detection device, and when the vehicle passes the alarm stop position, it is added to the signal of the second vehicle detection device. Based on this, the number of vehicles is subtracted, and a leveling control output for continuing the leveling warning until the vehicle number count value becomes zero is generated.

To solve the fourth problem, the computer is
Even if the vehicle passes through the railroad crossing based on the progress signal of the traffic signal, and then moves backward and passes through the railroad crossing again, only one vehicle count value is subtracted for each vehicle. It is characterized in that it has a logic to detect that the vehicle has gone backwards, and when it detects the backward driving, it keeps counting the number of vehicles and performs alarm control based on vehicle detection using a track circuit.

To solve the fifth problem, the computer is
A logic for detecting a failure of the first vehicle detection device,
When a failure is detected, counting of the number of vehicles is suspended, and alarm control based on vehicle detection using a track circuit is performed.

[0014]

According to the first means for solving the problems, in the vehicle detection device, the first vehicle detection device detects the vehicle at the alarm start position, and the second vehicle detection device detects the vehicle at the alarm stop position. The interlocking condition and the vehicle position condition in the station yard are input to the computer, the alarm start position condition is input from the first vehicle detection device, and the alarm stop position condition is input from the second vehicle detection device. , The alarm start position condition and the required interlocking condition are input to start the level crossing alarm,
Generates a level crossing control output that continues the leveling alarm until an alarm stop position condition is input. That is, the railroad crossing control is performed by the control logic of the point control system. Therefore, it is possible to obtain a railroad crossing control device that can control railroad crossings in a station yard having complicated track wiring and interlocking conditions with simple and highly versatile logic and conditions with high safety.

In the second means for solving the problem, a virtual railroad crossing is assumed at the position of the departure traffic light installed in the station yard, and there are two sections, an outer warning zone and an inner warning zone, with the virtual railroad crossing as a boundary. The alarm control for the virtual level crossing in the outer alarm section and the alarm control for the level crossing in the inner alarm section are individually performed, and the alarm control for the level crossing is performed by the logical sum of the alarm control outputs of both sections. Therefore, even after the alarm is once started in the outer alarm section, the alarm for the level crossing can be stopped if the alarm stop condition is satisfied in the outer alarm section.

In the third means for solving the problems, the computer produces a level crossing control output for continuing the level crossing warning until the count value of the number of vehicles existing in the alarm section becomes zero, so that the computer performs leveling control according to the number of vehicles. be able to.

According to the fourth means for solving the problems, the number of vehicles can be grasped even when the vehicle goes backward in the alarm section,
Railroad crossing control can be performed according to the number of vehicles.

According to the fifth problem solving means, in the crossing control system of the point control system, even if the vehicle detection device arranged at the warning start position fails, the crossing warning control by the track circuit is performed. You can avoid the alarm.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing an example of a schematic diagram of a linear diagram and level crossing control to which the present invention is applied. 1 is a computer, 21-23 is a vehicle detection device, 3 is a railroad crossing, 4 is a vehicle,
5 indicates a railroad crossing alarm, and A indicates the inside of a station. 1RAT, 1RB
T is a home truck, and 51T and 52T are track circuits. P1 is an alarm start position, P2 is an alarm stop position, 61 and 62 are rolling machines, and 5RY, 6RY and 6RZ are departure signals.

After the vehicle detection devices 21 to 23, the first vehicle detection devices 21 and 22 are arranged at the alarm start position P1 and the second vehicle detection device 23 is arranged at the alarm stop position P2. A typical example of the vehicle detection devices 21 to 23 is a level crossing controller, and various other point detection type vehicle detection devices such as an optical type, an electric type, and an electronic type can be used. Further, when the alarm start position P1 and the alarm stop position P2 coincide with the track circuit boundary, a track relay provided in the track circuit can be used. The warning start position P1 is arranged in the station yard A, and the warning stop position P2 is arranged at a position where the vehicle 4 passing through the railroad crossing 3 can be detected. The railroad crossing 3 is arranged in the station premises A or in the vicinity thereof.

The interlocking condition and the vehicle position condition in the station premises A are input to the computer 1. The interlocking conditions are the traffic lights 5RY, 6RY, 6RZ, etc. of the station premises A, the rolling machine 61,
62 is provided from an interlocking device that is usually provided to control the device. The vehicle position condition includes an alarm start position condition and an alarm stop position condition, the alarm start position condition is input from the first vehicle detection device 21 or 22 installed at the alarm start position P1, and the alarm stop position condition is an alarm. It is input from the second vehicle detection device 23 installed at the stop position P2. In the computer 1, the alarm start position condition is input from the first vehicle detection device 21 or 22, and the interlocking device inputs the required interlocking condition, that is, the interlocking condition that the course of the departure signal 5RY or 6RY is configured. To start the railroad crossing alarm and the alarm stop position condition is the second vehicle detection device 23.
Generates a crossing control output that continues the crossing alarm until it is input from. That is, the railroad crossing control is performed by the control logic of the point control system. Therefore, it is possible to obtain a railroad crossing control device that can control railroad crossings 3 in or near a station having complicated track wiring and interlocking conditions with simple and highly versatile and highly safe logic and conditions. ..

When a series of alarm control is performed from the alarm start position P1 to the alarm stop position P2 by the above point control method, the following problems occur. (A) In the point control method, the alarm start position condition is the first
Is input from the vehicle detection device 21 or 22 and the interlocking device inputs the required interlocking condition, that is, the interlocking condition that the course of the departure signal 5RY or 6RY is configured, to start the railroad crossing alarm, and the alarm stop position. Since the level crossing alarm is continued until the condition is input from the second vehicle detection device 23, the vehicle 4 is at the home position of the alarm start position.
The railroad crossing alarm will continue even if the vehicle is in the RAT or 1RBT, if the route is emptied or rerouted, or if the power is restored after a power failure. Home truck 1R
In order to delay the departure of the vehicle 4 stopped on the AT, even if the route configuration of the departure signal 5RY once configured is canceled (referred to as empty route), the level crossing alarm cannot be stopped. For this reason, the level crossing warning time for the level crossing 3 becomes long, which causes a level crossing obstacle for other transportation means. (B) If the alarm start position P1 is outside the station yard A and there are a plurality of U-lane tracks at a railroad crossing where the alarm start condition does not include an interlocking condition, the alarm stop condition is not determined.

As a means for solving the above-mentioned problems, departure signals 5RY and 6RY, 6RZ installed in station premises A
Assume virtual crossings X1 and X2 at the position. When the computer 1 defines the outward warning section L1 from the vehicle stop position on the home truck 1RAT or 1RBT to the virtual crossing X1 or X2 and the internal warning section L2 from the virtual crossing X1 or X2 to the crossing 3 The alarm control for the virtual level crossing X1 or X2 in the alarm section L1 and the alarm control for the level crossing 3 in the inward alarm section L2 are individually performed, and the alarm control of the level crossing 3 is performed by the logical sum of the alarm control outputs of both sections L1 and L2. Do.

Although the railroad crossing 3 is a real railroad crossing, the virtual railroad crossings X1 and X2 are not real railroad crossings but virtual railroad crossings for execution of control logic. Since the control logics of the virtual level crossings X1 and X2 are the same, the virtual level crossing X1 will be mainly described below.

FIG. 2 is a diagram showing the concept of level crossing control using the virtual level crossings X1 and X2. The alarm start condition in the outer alarm section L1 is the vehicle position condition that the vehicle 4 is on the home truck 1RAT and the departure signal 5R.
It is the logical product of the interlocking conditions that the Y path is configured. The fact that the vehicle 4 is present on the home truck 1RAT is given as a condition for dropping the track relay of the home truck 1RAT, and the course configuration of the departure signal 5RY is a condition for linking the conditions for falling the approach locking relay ASR of the departure signal 5RY. Given. The alarm stop condition is either that the vehicle 4 has left the position of the departure signal 5RY, or that a certain time has elapsed after the alarm start condition was not satisfied. The fact that the vehicle 4 has exited the departure signal 5RY can be known from the conditions such as the rise of the track relay of the home truck 1RAT.

The alarm start condition of the inward alarm section L2 is linked with the vehicle position condition that the vehicle 4 has left the departure signal 5RY and entered the track circuit 52T, and the route of the departure signal 5RY is configured. It is the logical product of the conditions. The vehicle position condition is given by the condition that the track relay of the track circuit 52T has dropped. The alarm stop condition is that the vehicle 4 has passed the railroad crossing 3. The fact that the vehicle 4 has passed the railroad crossing can be deciphered from the signal of the second vehicle detection device 23.

Based on the above-mentioned control logic, the computer 1 individually carries out warning control for the virtual crossing X1 in the outer warning section L1 and warning control for the crossing 3 in the inner warning section L2, and at the same time, for both sections. The alarm control of the railroad crossing 3 is performed by the logical sum of the alarm control outputs. Therefore,
When the vehicle 4 is on the home truck 1RAT, the path of the departure signal 5RY is configured, and when the alarm start condition for the virtual railroad crossing X1 is satisfied in the outer alarm zone L1, the alarm control for the railroad crossing 3 is performed. After the alarm is started, for example, in order to delay the departure of the vehicle 4, when the course configuration of the departure signal 5RY once configured is canceled, the alarm start condition of the outer alarm section L1 is not satisfied.
After that, if the alarm start condition is not satisfied even after a lapse of a certain time, the alarm stop condition is satisfied and the alarm control for the railroad crossing 3 is stopped.

In this way, the alarm section is divided into the outer warning section L1 and the inner warning section L2 with the virtual crossing X1 as a boundary.
Virtual crossing X in the outer warning section L1
1 and the alarm control for the railroad crossing 3 in the inner alarm section L2 are individually performed, and the alarm control of the railroad crossing 3 is performed by the logical sum of the alarm control outputs of both sections. Even after the alarm is started once at L1, the alarm for the railroad crossing 3 can be stopped if the alarm stop condition is satisfied.

Next, in the level crossing control device which adopts the point control method, when there are a plurality of vehicles in the alarm section, the level crossing alarm is stopped when the leading vehicle passes the alarm stop position. You have to avoid it. The countermeasure will be described with reference to FIG. In FIG. 3, FIG.
The same reference numerals as in FIG.
1RA is a traffic signal for home truck 1RAT,
1RB is a traffic signal for home truck 1RBT,
1T, 2T, 3T, 21T, 22T are track circuits, 23
Reference numerals 1 and 232 are second vehicle detection devices, 63 to 65 are rolling machines, and 1R, 2R and 3R are blockage signals. Railroad crossing 3 is installed in station premises A. The second vehicle detection device 231,
233 can also be configured by a track relay provided in the home trucks 1RAT, 1RBT, etc. when the alarm stop position P2 coincides with the track circuit boundary.

In the linear case of FIG. 3, according to the normal vehicle operation management, the warning start position P1 and the traffic signal 1RA are 1
A plurality of vehicles 41 to 4n may enter the track circuits 1T, 2T, and 3T in the closed section with the RB. Computer 1
The vehicle number is added based on the signal of the first vehicle detection device 21 every time the vehicles 41 to 4n pass the warning start position P1, and each time the vehicles 41 to 4n pass the warning stop position P2. , The number of vehicles is subtracted based on the signal of the second vehicle detection device 231 or 232, and a leveling control output is generated to continue the leveling warning until the vehicle number count value becomes zero.
As a result, the level crossing control can be performed according to the number of vehicles. FIG. 4 is a diagram showing the concept of the vehicle count cout.

In the case where the above-described vehicle number counting control is performed, the number of vehicles counted at the alarm start position P1 and the number of vehicles passing through the alarm stop position P2 due to any of the vehicles 41 to 4n moving backward in the alarm section. May not match. The vehicles 41 to 4n that have entered the track circuits 1T, 2T, and 3T have passed the alarm start position P1 and are therefore counted as the number of vehicles. In this state, for example, the leading vehicle 41 is the home truck 1RAB.
Although the vehicle should have entered, there is a case where the vehicle is erroneously operated to enter the home truck 1RAT as indicated by arrow (a). In such a case, the vehicle 41 must be retracted as indicated by the arrow (b) and then guided to the home truck 1RBT as indicated by the arrow (c). Since the regressed vehicle 41 undergoes subtraction processing based on the vehicle detection signals of the second vehicle detection devices 231 and 232, the actual number of vehicles counted based on the vehicle detection signal of the first vehicle detection device 21 and the subtraction processing The number of later vehicles does not match. Therefore, in the computer 1, the vehicles 41 to 4n are
Even if the vehicle crosses the railroad crossing 3 based on the progress signals of RA and 1RB, and then retreats and passes through the railroad crossing 3 again, the logic that only one vehicle count value is subtracted for each vehicle and the vehicles 41 to 4n are traffic lights. It has a logic to detect that the retreat operation is performed to the outside of 1RA and 1RB. When the retreat operation is detected, the number of vehicles is held and alarm control is performed based on the vehicle detection using the track circuit. On-site traffic light 1R
When the retreat operation is performed to the outside of A and 1 RB, it can be detected by the operation logic of the orbit relay of the orbit circuit included in the retreat route. For example, when the retreat operation is performed along the routes indicated by arrows (a) to (c) in FIG. 3, the track relay of the track circuit 21T is lifted from the fall state while the track relay of the home truck 1RAT is lifted. By catching the change, the retreat operation can be detected. In detecting the retreat operation, the direction of the rolling machine 63 can be referred to.

As described above, if the retreating vehicle 41 exits outside the on-site traffic lights 1RA, 1RB, the retreat can be detected by the track circuit logic, but if it stays inside the on-site traffic lights 1RA, 1RB, the track circuit logic is detected. Can not be detected by. In such a case, the traffic signal 1R
With the logic that only one vehicle count value is subtracted for one vehicle that has entered due to the progress signals of A and 1RB, it is possible to prevent the subtraction more than twice associated with the retreat operation. That is,
When a vehicle that has entered due to the progress signal of the traffic lights 1RA, 1RB stays at the traffic lights 1RA, 1RB,
The on-site traffic lights 1RA and 1RB are still the stop signals, and the vehicle detection signals are input from the second vehicle detection devices 231 and 232 two or more times in the state of the stop signals to configure a logic to ignore the vehicle detection signals.

Further, the computer 1 has a logic for detecting a failure of the first vehicle detection device 21, and when the failure is detected, the counting of the number of vehicles is suspended and an alarm based on the vehicle detection using the track circuit is issued. Get control. As a result, no alarm can be avoided.

[0034]

As described above, according to the railroad crossing control device of the present invention, the following effects can be obtained. (A) According to the first problem solving means, the vehicle detection device is
The first vehicle detection device detects the vehicle at the alarm start position, the second vehicle detection device detects the vehicle at the alarm stop position, and the computer inputs the interlocking condition and the vehicle position condition in the station yard, and the vehicle position The first condition is the alarm start position condition.
Is input from the vehicle detection device of
From the vehicle detection device, the alarm start position condition and the required interlocking condition are input to start the level crossing alarm, and the level crossing control output that continues the level crossing alarm until the alarm stop position condition is input is generated. The level crossing control is performed by the control logic of the system, and it is possible to provide a level crossing control device that can control a level crossing in a station with complicated track wiring and interlocking conditions with simple and highly versatile and highly safe logic and conditions. .. (B) According to the second problem solving means, the virtual crossing is divided into two sections, the outer warning section and the inner warning section, with the virtual crossing as a boundary, and the alarm control for the virtual crossing in the outer warning section and the inner section. The alarm control for the railroad crossing in the alarm section is performed separately, and the alarm control for the railroad crossing is performed by the logical sum of the alarm control outputs of both sections, so the alarm is stopped even after the alarm is once started in the outer alarm section. It is possible to provide a railroad crossing control device of a point control system capable of stopping the alarm for the railroad crossing when the conditions are satisfied. (C) According to the third problem solving means, the computer is
Since a level crossing control output for continuing the level crossing warning is generated until the count value of the number of vehicles existing in the alarm section becomes zero, it is possible to provide a level crossing control device capable of performing leveling control according to the number of vehicles. (D) According to the fourth problem solving means, there is provided a railroad crossing control device capable of grasping the number of vehicles and performing railroad crossing control in accordance with the number of vehicles even when the vehicle goes backward in the alarm section. Can be provided. (E) According to the fifth problem solving means, in the crossing control device of the point control system, it is possible to perform the crossing warning control by the track circuit even when the vehicle detection device arranged at the warning start position fails. A level crossing control device can be provided.

[Brief description of drawings]

FIG. 1 is a diagram showing a linear diagram to which a railroad crossing control device according to the present invention is applied and a schematic configuration example of railroad crossing control.

FIG. 2 is a diagram showing the concept of a level crossing control device according to the present invention using a virtual level crossing.

FIG. 3 is a diagram showing a linear diagram to which the railroad crossing control device according to the present invention is applied and a schematic configuration example of railroad crossing control.

FIG. 4 is a diagram showing a concept of a railroad crossing control device according to the present invention in which a vehicle count cout is provided.

[Explanation of symbols]

 1 Computer 21, 22 First Vehicle Detection Device 23, 231, 232 Second Vehicle Detection Device 3 Railroad Crossing X1, X2 Virtual Railroad Crossing

Claims (5)

[Claims] 1. A railroad crossing control device, comprising a computer and a vehicle detection device, for providing railroad crossing control to a railroad crossing located in or near a station, wherein the vehicle detection device is a first vehicle detection device. A second vehicle detection device, the first vehicle detection device detects a vehicle at an alarm start position, the second vehicle detection device detects a vehicle at an alarm stop position, and the computer is a station The interlocking condition on the premises and the vehicle position condition are input, the vehicle position condition includes an alarm start position condition and an alarm stop position condition, the alarm start position condition is input from the first vehicle detection device, and the alarm The stop position condition is input from the second vehicle detection device,
A railroad crossing control device for generating a railroad crossing control output for starting a railroad crossing alarm by inputting the alarm start position condition and a required interlocking condition and continuing the railroad crossing alarm until the alarm stop position condition is input. 2. A virtual railroad crossing is assumed at the position of a departure signal installed in the station yard, and the computer sets the outside warning section from the vehicle stop position to the virtual railroad crossing, and from the virtual railroad crossing to the railroad crossing. When is an inner warning section, the alarm control for the virtual railroad crossing in the outer warning section and the alarm control for the railroad crossing in the inner warning section are individually performed,
The railroad crossing control device according to claim 1, wherein the railroad crossing control is performed based on a logical sum of the alarm control outputs of both sections. 3. The computer adds the number of vehicles based on a signal from the first vehicle detection device when the vehicle passes the alarm start position, and the computer adds the number of vehicles when the vehicle passes the alarm stop position. The railroad crossing control according to claim 1, wherein the number of vehicles is subtracted based on a signal from the second vehicle detection device, and a railroad crossing control output is generated to continue the railroad crossing warning until the count value of the number of vehicles becomes zero. apparatus. 4. The vehicle count value for one vehicle, even if the vehicle moves backward through the railroad crossing based on a traveling signal of an on-site traffic signal and then retreats (referred to as retreat operation) and passes through the railroad crossing again. It has a logic to decrement only one and a logic to detect that the vehicle has retreated to the outside of the on-site traffic light. When the retreat is detected, the count of the number of vehicles is suspended and the vehicle is detected using the track circuit. The railroad crossing control device according to claim 3, wherein the alarm control is performed based on the alarm control. 5. The computer has logic for detecting a failure of the first vehicle detection device, holds a count of the number of vehicles when a failure is detected, and issues an alarm based on vehicle detection using a track circuit. The crossing control device according to claim 3 or 4, wherein the control is performed.