JPH11193700A - Ventilation operating system for highway tunnel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilation operating system for a highway tunnel, capable of keeping well an environment in a long highway tunnel in accordance with a traffic density. SOLUTION: In a highway tunnel formed with a first stage consisting of a vertical flow ventilation section I and an air supply and exhaust section II and a second stage consisting of a fresh air supply section III, a vertical flow ventilation section I' and an air supply and exhaust section II', ranging to the first stage, means for estimating a traffic density in the first stage based on a value for the traffic density measured by a traffic meter provided in front of a tunnel entrance 1a, estimating the exhaust amount of contaminants in the tunnel 1 from the estimated value for the traffic density, finding a required amount of vertical flow ventilation air and controlling the amount of ventilation air in the first stage based on the calculated value are provided. Means for estimating a traffic density in the second stage based on a value for the traffic density measured by the traffic meter provided in front of the tunnel entrance, estimating the exhaust amount of contaminants in the tunnel from the estimated value for the traffic density, calculating a required amount of vertical flow ventilation air and controlling the amount of ventilation air in the second stage based on the calculated value are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile tunnel ventilation operation system, and particularly to a long tunnel exclusively used for automobiles, which performs environmental protection in the tunnel economically and optimally in accordance with traffic conditions of vehicles and the like. It relates to a ventilation operation system that can be used.

[0002]

2. Description of the Related Art Automobile tunnels are used to extend the tunnel.
The size of the ventilation system is increasing, and the conditions imposed on the ventilation system are qualitatively sophisticated and diverse. Ventilation in long tunnels is intended to ensure the safety, comfort and environment for maintenance work in the tunnels. For this reason, it is necessary to maintain the concentration of polluted air due to vehicle exhaust gas below the allowable value. No. Also, in recent years, there has been a strong demand for consideration of air quality protection of pollutants that leak intensively from the tunnel exit.

Conventional ventilation in automobile tunnels is generally classified into three types, that is, natural ventilation, longitudinal ventilation, and crossflow ventilation, and each has its own advantages and disadvantages. The natural ventilation method is a method in which the circulation of air in a tunnel is left to the natural without literally providing any forced ventilation equipment. The longitudinal ventilation system is
This is a ventilation system in which a fan such as a jet fan is installed in the tunnel, and fresh air is forcibly sucked in from the tunnel entrance, circulated vertically (lengthwise) through the tunnel, and discharged from the tunnel exit. . This ventilation system is relatively economical, but as the length of the tunnel increases, the concentration of pollutants in the tunnel and near its exit increases, causing environmental conservation problems in the tunnel and near its exit.

In the cross-flow ventilation system, an air supply port and an exhaust port are continuously provided in almost the entire area of a tunnel along a roadway to simultaneously introduce fresh air and discharge contaminated air in almost the entire area of the tunnel. Is diluted with fresh air supplied from an air supply port and immediately discharged to an exhaust port. Therefore, it is possible to keep the whole tunnel in a good environment, and this ventilation method
It is the most reliable in terms of no restrictions on tunnel extension and excellent fire response.

[0005] However, in the above-mentioned cross flow ventilation system, since the air inlet and the air outlet are provided over substantially the entire length in the tunnel extending direction, the cost of the duct equipment including the blower and the exhaust fan is expensive. There are economic difficulties.
Further, in a one-way tunnel having this ventilation system, a longitudinal action (wind along the length direction in the tunnel) is induced in the tunnel by a piston action accompanying the traffic of the automobile. Exhaust gas from the vehicle leaks into the tunnel exit pit, which causes a problem in air quality protection around the pit. Particularly in urban areas, the number of cases in which car roads are constructed underground or in hills is increasing due to difficulties in location. In such a car tunnel, there is a possibility that environmental protection problems may occur near the tunnel exit.

[0006] In recent years, a long tunnel with a length of 10 km has emerged or is being planned in the future, and it is considered that the length of the tunnel will be further increased. In such a long tunnel, the conditions required for the ventilation system include the environmental protection around the tunnel entrance as well as the environmental protection inside the tunnel, and the economical ventilation system related to the manufacturing cost in construction. It is the realization of. However, it is difficult for the above-mentioned conventional ventilation system to satisfy the above-mentioned environmental conservation and economy in a well-balanced manner, and there has been a strong demand for the construction of a new ventilation system.

[0007] In a long vehicle tunnel, the amount of exhaust gas generated by a vehicle or the like fluctuates greatly depending on the traffic conditions of the vehicle. For example, the amount of exhaust gas is significantly different between a state where the traffic of a car is small at night or the like and a state where the car is crowded during rush hour. For this reason, it would not be uneconomical to always operate with the maximum ventilation capacity of the tunnel. In addition, if the vehicle is operated in a ventilation state according to the average traffic volume of the vehicle, the traffic volume of the vehicle fluctuates from time to time, so that the environment in the tunnel cannot always be kept good.

In such a situation, the ventilation system used in most automobile tunnels is roughly as follows. Various sensors to measure the concentration of pollutants and a traffic meter to measure the traffic volume are installed in the tunnel, and the control volume and the target value are compared, and the corrective operation of the ventilation air volume is performed so that they match. Feedback control method to be performed. A feed-forward control method in which a traffic meter is installed in front of the tunnel, and the required amount of ventilation equipment is operated in advance before the effect of the concentration of pollutants in the tunnel appears on the control system based on traffic condition information. A program control method that does not determine the ventilation air volume based on the pollutant concentration or traffic volume in the tunnel, but performs the ventilation volume per time by a predetermined program.

[0009]

However, as the length of the tunnel increases, the size of the mechanical equipment for tunnel ventilation tends to increase. Naturally, when the size of the ventilation system increases, the position of the exhaust fan and the blower is increased. And a position where the concentration of the pollutant in the actual tunnel is high, which tends to reduce the response speed of the ventilator. For this reason, in a long tunnel, if the conventional feedback control method is used, if the concentration of pollutants suddenly increases as the vehicle travels, the ventilation wind corresponding to this will reach. It takes a long time, and it cannot cope with an increase in the concentration of pollutants. In addition, it is difficult to predict the traffic volume in the program control method, and it is difficult to provide an appropriate ventilation volume according to the situation of exhaust gas accompanying the traffic of a vehicle that fluctuates every moment.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide an automobile tunnel ventilation operation system capable of maintaining an environment in a long automobile tunnel in good condition according to the traffic volume. I do.

[0011]

SUMMARY OF THE INVENTION An automobile tunnel ventilation operation system according to the present invention comprises a first stage comprising a longitudinal ventilation section I and a supply / exhaust section II, and a fresh air supply section III following the first stage. And longitudinal flow ventilation section I 'and air supply and exhaust section
II ', a second stage consisting of a second stage and a traffic tunnel in the first stage, based on a traffic value measured by a traffic meter provided in front of the tunnel entrance. Means for predicting the discharge amount of pollutants in the tunnel from the predicted value and obtaining the required vertical ventilation airflow, controlling the ventilation airflow of the first stage based on the calculated value, and a traffic meter provided at the entrance of the tunnel. Predicting the traffic volume of the second stage based on the measured traffic volume, predicting the emission amount of pollutants in the tunnel from the predicted value of the traffic volume, and calculating the required longitudinal ventilation airflow. Means for controlling the amount of ventilation air of the second stage based on the value.

Further, the ventilation air volume is characterized in that the ventilation air volume is controlled in a similar manner to the maximum ventilation air volume corresponding to the maximum traffic volume in accordance with the traffic volume.

According to the present invention described above, the longitudinal ventilation section I
In the first stage consisting of the air supply and exhaust section II, the fresh air sucked from the entrance of the tunnel increases the pollution concentration in the traveling direction due to the exhaust gas of the passing vehicle. By making the exhaust amount larger in comparison, the entire amount of pollutants generated in the stage 1 can be exhausted. Then, in the second stage, fresh air is taken in from the fresh air supply section III in the same manner as at the tunnel entrance, and the contaminant concentration increases again in the vertical ventilation section I ′, but the amount of air supplied in the air supply and exhaust section II ′ increases. By increasing the displacement in comparison, the longitudinal flow section I '
The entire amount of pollutants generated in the tunnel can be discharged, and by taking in fresh air from the exit side of the tunnel, environmental protection of the wellhead can be performed. That is, from the viewpoint of ventilation, the stage 1 and the stage 2 are configured such that two independent tunnels are cascaded and connected.

The traffic amount is predicted based on the measured value of the traffic meter provided in front of the tunnel entrance, and the pollution concentration in the tunnel of the first stage is predicted from the predicted traffic amount. The ventilation volume is calculated so as to maintain the internal environment, and the ventilation volume in the first stage is controlled based on the calculated value. Therefore, it is possible to optimally preserve the environment of the tunnel in the first stage corresponding to the above. Similarly, the traffic volume is predicted based on the measured value of the traffic meter provided at the entrance of the tunnel, the pollution concentration in the tunnel of the second stage is predicted from the predicted traffic volume, and a sufficiently favorable environment in the tunnel is determined. By calculating the amount of ventilation to maintain it and controlling the amount of ventilation in the second stage based on the calculated value, it was possible to respond to the ever-changing traffic volume despite the slowing of the response speed of the ventilation equipment. Optimum environmental preservation of the tunnel in the second stage can be performed.

Further, the automobile tunnel ventilation operation system of the present invention includes a traffic meter and sensors for measuring the concentration of pollutants near the end of the longitudinal ventilation section of the first stage and the second stage. The traffic volume and the pollutant concentration are compared with the predicted value, and the ventilation air volume is corrected based on the comparison result. Thereby, when a difference between the prediction and the actual occurs, the influence of the difference can be corrected, and the operation of the ventilation device in an optimal state can be continued.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an automobile tunnel ventilation operation system according to an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the tunnel 1 has a longitudinal ventilation section I, which extends from an inlet side 1a to an outlet side 1b.
It is divided into a first stage consisting of a sending / exhausting section II, a second stage consisting of a fresh air supply section III, a vertical ventilation section I 'and a sending / exhausting section II'. Here, the transmission and exhaust section II
Is an irregular cross-flow ventilation section, in which the exhaust amount is larger than the air supply amount, and exhausts all the vertical flow ventilation air amount and the air supply air amount. In the second stage, the fresh air supply section
In III, fresh air is introduced from outside the tunnel, passes through the vertical ventilation section I ', and in the air supply and exhaust section II', the whole amount is discharged together with fresh air introduced from the wellhead exit side.

Then, in each ventilation section I, II, III,
I 'and II' are provided with mechanical ventilation equipment for providing a predetermined ventilation wind in the tunnel. The methods and specific roles of these mechanical ventilation equipment are as follows.

That is, jet fans 2a and 2b are installed in the vertical ventilation sections I and I 'at the ceiling of the tunnel 1. The jet fans 2a and 2b are boosters that compensate for the shortage of air flow in the tunnel due to the action of the vehicle piston during normal ventilation. In other words, in a car tunnel, the amount of air flow can be obtained by the action of a piston that moves the air itself as the car travels, but this is not enough to dilute the contaminated air generated in the tunnel, and the jet is not sufficient. By installing the fans 2a and 2b, a ventilation amount necessary for diluting or discharging the contaminated air is secured.

The air supply / exhaust sections II and II 'located at the center and the exit side of the tunnel are provided with an irregular cross-flow ventilation which is located upstream and supplies fresh air into the tunnel and discharges polluted air outside the tunnel. In this section, fresh air is pushed into the tunnel using the blower 3, and contaminated air in the tunnel is discharged to the outside by the exhaust fan 4. In addition, the transmission and exhaust section II
There is a fresh air supply section III which is located on the downstream side of the vessel and performs only the supply of fresh air.
Is used to supply fresh air into the tunnel.

This tunnel ventilation operation system sets an ideal flow pattern for ventilation in a tunnel at a design traffic volume (maximum traffic volume), and when the traffic volume changes,
The operation is controlled so as to be an appropriate value according to the traffic volume while maintaining this ideal flow pattern.

Next, a basic flow pattern in a road during ventilation will be described. This ventilation operation system is based on the premise that vertical air flows through the tunnel in order to maintain a constant level of ventilation and wellhead environment in the tunnel. That is, in the longitudinal ventilation sections I and I ', ventilation wind is generated in the tunnel in the traveling direction of the vehicle by the action of the jet fan and the car piston. In the air supply / exhaust section, the air flow speed in the roadway is reduced by appropriately setting the exhaust flow rate per unit length and the magnitude of the air supply flow rate. Then, the contaminated air sent from the upstream side is diluted by the supply of fresh air from the outside, diluted to the contaminant concentration level on the tunnel entrance side, and discharged to the outside of the tunnel. To reduce the concentration load at

Then, in the next stage 2, the contaminant concentration level at the tunnel entrance is reached in the air supply section III, and in the subsequent vertical ventilation section I ', as in the vertical ventilation section of the stage 1, A ventilation action such as a jet fan and an automobile piston action generates a ventilation wind in the tunnel in the traveling direction of the vehicle. In the air supply / exhaust section on the exit side of the exit, the wind speed in the roadway is reduced by appropriately setting the exhaust flow rate per unit length and the magnitude of the air supply flow rate. That is, in this section, in order to suppress the amount of leakage from the wellhead to the outside of the tunnel, it is necessary to set the flow rate of air supply / exhaust in the section so that the wind speed at the tunnel exit is zero or reverse.

The basic flow pattern of the ventilation air volume in the tunnel described above indicates the relationship in the reference traffic volume (maximum traffic volume or design traffic volume). Therefore, for any traffic volume, this pattern (ratio)
While maintaining the above, the air volume is increased or decreased. The wind speed in the road in the vertical ventilation section is controlled in proportion to the traffic volume of the vehicle. That is, the amount of pollutant emission in the tunnel in the vertical ventilation section is proportional to the traffic volume of the vehicle. Therefore, when the traffic volume is small, the pollutant emission volume is also small, so that the allowable pollutant concentration is satisfied. This is because the wind speed in the road (airflow in the road) may be set smaller by that amount. As described above, the maximum equipment capacity of the air flow rate and the exhaust air flow rate determined at the maximum traffic volume is set as an upper limit, and the air flow rate and the air flow rate of the exhaust air are appropriately controlled according to the detected vehicle traffic volume, so that the concentration of the pollutant in the tunnel is reduced. Is kept below the allowable concentration.

However, as described above, as the size of the air supply / exhaust equipment increases, the response speed decreases, and a problem arises in that it is not possible to secure and maintain the required ventilation at each time. In order to avoid such a situation, it is necessary to predict the traffic condition in the tunnel in advance, thereby predicting the concentration of the exhaust gas of the vehicle, and predictively operate the ventilation.
For this reason, a traffic meter will be provided in front of the tunnel entrance.
This traffic meter is provided at a point A about 2 km ahead of the tunnel entrance in the present embodiment. The traffic meter calculates the traffic volume of the vehicle, that is, the number of vehicles passing per unit time, the vehicle speed, the mixing ratio of large vehicles, and the like, with a monitor video camera and analyzing the image.

Therefore, vehicles passing through the point A are 2
After 3 minutes, you reach the tunnel entrance (Point B)
Stage 1 about 2 km away from the tunnel entrance after 3 minutes
To the point C near the end point of. Therefore, by measuring the traffic volume at the point A in front of the tunnel with a traffic meter, it is possible to predict the traffic volume in the tunnel of stage 1 several minutes later. Thereby, the wind speed of the longitudinal ventilation wind in the tunnel can be theoretically calculated, and the emission amount of the pollutant can be calculated in advance based on the data of the traffic volume.
Then, the pollutant concentration distribution is calculated based on the velocity of the longitudinal ventilation wind in the tunnel, and the finally required air supply / discharge amount can be calculated by the ventilation calculation.

Similarly, by measuring the traffic at the point B at the entrance of the tunnel using a traffic meter, it is possible to predict the traffic in the tunnel of the stage 2 having a length of about 2 km after several minutes. it can. Thus, in the second stage as well as in the first stage, necessary air supply and
It is possible to calculate the displacement by ventilation calculation.

The traffic meter sets the minimum measurement time to 5 minutes or 10 minutes when measuring the traffic volume. The total number of vehicles passing during this time, the average vehicle speed, and the large vehicle mixing ratio are displayed. First, a theoretical calculation of the wind speed in the tunnel is performed based on the traffic volume measured during the 5 minutes (10 minutes). At the same time, by calculating the average soot generation amount, the required ventilation amount and the predicted soot passage rate (VI value) are theoretically obtained. The ventilation volume of the jet fan in the vertical flow ventilation section, the operating air volume of the blower and the exhaust fan in the air supply / exhaust section, and the like are determined from the required ventilation amount thus obtained.

In this embodiment, the traffic meter, the VI meter, the CO meter, and the NO meter are located near the portion where the concentration of the contaminants is highest in the first and second stages of the tunnel, that is, near the end of the vertical ventilation section. A sensor for measuring the concentration of pollutants, such as an _X- meter, and a sensor for measuring the wind speed are provided. This is defined as a point C of the first stage and a point D of the second stage. At the points C and D, the traffic volume and the like of vehicles actually passing through are calculated by a traffic meter. The program for grasping the current state of the tunnel ventilation state grasps the current state at the time when the operation of the blower / exhaust fan is to be performed by the ventilation prediction operation program described above. From the traffic meters at the points C and D, the traffic volume per unit time, the mixing ratio of large vehicles, the traffic speed of vehicles, and the like are similarly measured. Then, the measurement result is compared with the prediction result of the traffic meter at the point A and compared. Therefore, the prediction result of the traffic volume at the point A is compared and corrected by the measurement result of the traffic volume at the point C,
Based on this, the ventilation air volume and the like are corrected.

The relationship between the vehicle travel time and the time required for fresh air to reach the location required is, for example, in the case of point B, the time required for the vehicle to reach point C from the tunnel entrance is 3 minutes on average. The average time for fresh air to reach point C from the tunnel entrance is 6 minutes. The time required for the vehicle to reach point C from point A in front of the tunnel entrance is about five and a half minutes. The time required for the vehicle to reach the point D from the point C is an average of three and a half minutes, and the time required for fresh air to reach the point D from the air outlet of the fresh air supply section III is an average of six and a half minutes. Since there is a difference between the speed of the vehicle and the speed of the fresh air,
It is necessary to perform predictive control so as to eliminate this deviation. Note that this is a case where the point A is installed 2 km ahead of the tunnel entrance. Because the time for fresh air to reach the point where the concentration of pollutants is highest is quite large,
The ventilator must start operation taking this time constant into account.

FIG. 2 shows the flow of a tunnel ventilation prediction program according to one embodiment of the present invention. First, the traffic condition is actually measured from a traffic meter installed at the point A. That is, as actual measured values, traffic volume, vehicle speed, large-vehicle mixture ratio, and the like are calculated. Then, by measuring for 5 to 10 minutes, the numerical values of the traffic volume, the vehicle speed, and the mixing ratio of large vehicles are determined. Then, based on the determined value, the longitudinal air flow in the vertical ventilation section in the tunnel is calculated in consideration of the air flow of the piston wind. Then an estimate of the pollutant emissions is calculated. Further calculate the contaminant concentration.
Then, the necessary ventilation air volume is calculated accordingly. Then, the air volume notch is determined, and the number of operating and the air volume of the jet fan, and further, the air volume and the air volume of the blower / discharger are determined.
In the case where the traffic meter installed at the point A is out of order, the measured values are replaced with actual measured values using data such as traffic volume, vehicle speed, and large vehicle mixing ratio obtained from past performance data.
Further, a traffic meter installed at the tunnel entrance (point B) may be used instead.

This program controls the ventilation air volume at the first stage of the tunnel based on the traffic volume measured at the point A, and calculates the ventilation air volume at the second stage portion of the tunnel based on the traffic volume measured at the point B. Control. Then, based on the traffic volume measured at the point C, the vehicle speed of the traffic volume measured at the point A is corrected. Similarly, based on the traffic volume measured at the point D, the vehicle speed of the traffic volume measured at the point B is corrected.

FIG. 3 shows a flow of a ventilation operation present condition grasping program according to an embodiment of the present invention. This is based on data from a traffic meter at point C and various sensors. First, the current values such as the traffic volume, the vehicle speed, and the mixing ratio of large vehicles at the point C are measured. Then, the required ventilation volume is calculated from the current ventilation state, and the required wind speed in the tunnel is calculated by a relational expression. And this wind speed is C in the tunnel.
This is compared with the actual value of the anemometer installed at the point. In addition, a comparison is made with the wind speed value of the previous cycle predicted from the traffic volume of the traffic meter at the point A. If there is a difference between them, the wind speed value set based on the predicted value is compared and adjusted.

Next, the pollutant emission amount and the pollutant concentration are calculated from the current traffic volume. And inside the tunnel (C
Value, CO value measured by various sensors at
The pollutant concentration, such as the value, NOx value, etc., is compared with the pollutant concentration of the previous cycle predicted from the traffic meter traffic at the point A. Then, based on the wind speed value and the pollutant concentration that have been compared and adjusted, a comprehensive comparison and adjustment is performed. And the first
Correct the air flow notch on the stage. That is, the number of operating jets and the amount of air and the number of operating blowers and exhaust fans and the amount of air are determined. If the fume transmission (VI) value increases, it means that the concentration of the contaminants has deteriorated, and thus the ventilation air volume is increased by interrupt processing.

Similarly, also at the point D, the traffic meter measures the current values such as the traffic volume, the vehicle speed, and the mixing ratio of large vehicles. Then, the required ventilation volume is calculated from the traffic volume at the present time, and the required wind speed in the tunnel is calculated by a relational expression.
Then, the wind speed is compared with the actual speed using an anemometer installed at the point D in the tunnel. In addition, it compares with the wind speed value of the previous cycle predicted from the traffic volume of the traffic meter at the point B. If there is a difference between them, the wind speed value set based on the predicted value is compared and adjusted. Next, the pollutant emission amount and the pollutant concentration are calculated from the current traffic volume. Then, the concentration of pollutants such as VI value, CO value, NOx value, etc. measured by various sensors in the tunnel (point D) is compared with the concentration of pollutants in the previous cycle predicted from the traffic volume of the traffic meter at point B. Compare and adjust. Then, based on the wind speed value and the pollutant concentration that have been compared and adjusted, a comprehensive comparison and adjustment is performed. Then, the airflow notch of the second stage is corrected. That is, the operating number and the air volume of the jet fan of the second stage, the operating number and the air volume of the blower / discharger are determined.

In the above-described embodiment, an example has been described in which the tunnel portion serving as a unit for introducing fresh air and discharging contaminated air has two stages, a first stage and a second stage. It goes without saying that the gist of the present invention can be similarly applied to a tunnel having a longer length and an additional number of stages.
Further, in the present embodiment, an example has been described in which an irregular cross-flow ventilation section is provided in which air is exhausted while performing air supply and exhaust over a certain zone in the air supply and exhaust section. However, concentrated vertical exhaust and concentrated vertical air supply may be used. . Thus, various modifications can be made without departing from the spirit of the invention.

[0037]

According to the present invention as described above,
By predicting the traffic volume based on the measured value of the traffic meter installed in front of the tunnel entrance, even in a large tunnel with a large time constant, the time required for the vehicle to pass through the part where the concentration of pollutant is the highest is adjusted. The air supply and exhaust volume can be adjusted. This allows an economical operation of the tunnel ventilation system while keeping the contaminant concentration within an acceptable range. Furthermore, by providing a means for comparing the predicted value of the traffic volume in the tunnel predicted at the entrance of the tunnel or at the tunnel entrance with the actual traffic volume in the tunnel, the difference between the predicted value and the actual value is corrected, Optimal ventilation system can be operated.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an automobile tunnel ventilation operation system according to an embodiment of the present invention.

FIG. 2 is a program flow chart of a tunnel ventilation prediction operation in FIG.

FIG. 3 is a flowchart of a program for grasping and operating a current situation in a tunnel in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tunnel 1a Tunnel entrance 1b Tunnel exit 2a, 2b Jet fan 3,5 Blower 4 Air blower T Traffic meter W Anemometer

Continuation of front page (72) Inventor Atsuko Komatsu 11-1 Haneda Asahimachi, Ota-ku, Tokyo Inside Ebara Corporation

Claims (5)

[Claims] 1. A first stage comprising a vertical flow ventilation section I and an air supply and exhaust section II, a fresh air supply section III following the first stage, a vertical flow ventilation section I ', and a supply and exhaust section II'. And a second stage comprising: a traffic tunnel in the first stage, based on a traffic value measured by a traffic meter provided in front of the tunnel entrance, and a predicted value of the traffic volume. Means for predicting the discharge amount of pollutants in the tunnel and obtaining the required vertical ventilation airflow, controlling the ventilation airflow of the first stage based on the calculated value, and the traffic volume provided by a traffic meter provided at the tunnel entrance. The traffic volume of the second stage is predicted based on the measurement value of the above, the emission amount of the pollutant in the tunnel is predicted from the predicted value of the traffic volume, and the required longitudinal ventilation airflow is calculated. The said Means for controlling two-stage ventilation air volume. 2. The vehicle according to claim 1, wherein the ventilation air volume is controlled in a similar manner to the maximum ventilation air volume corresponding to the maximum traffic volume, corresponding to the traffic volume. Tunnel ventilation operation system. 3. A traffic meter and sensors for measuring the concentration of pollutants are provided near the end of the longitudinal ventilation section of the first stage and the second stage, and the predicted values of the actual traffic and the concentration of pollutants are provided. 2. The vehicle tunnel ventilation operation system according to claim 1, wherein the ventilation air volume is corrected based on the comparison result. 4. The automobile tunnel ventilation operation system according to claim 3, wherein the traffic meter measures a traffic volume, a vehicle speed, a mixing ratio of large vehicles, and the like. 5. The sensor for measuring the concentration of the pollutant includes at least one of a VI meter, a NOx meter, and a CO meter, and further includes an anemometer, and measures the measured wind speed and the pollutant concentration. 4. The vehicle tunnel ventilation operation system according to claim 3, wherein the ventilation air volume is corrected based on a comparison result with a predicted value.