Why do you have an empty car that does not carry passengers in the early peak of the subway, but you can't overtime a few more times?

On the morning peak on working days, the migrant workers who raised the clock on the platform looked forward to the arrival of the train, and suddenly heard the radio sounding:

Is there a busy early peak? In fact, those empty cars are "overtime bus" or "small interchange vehicles".

Overall bus is a spare -running vehicle for a short period of time to quickly evacuate the peak period.

Small traffic cars are temporary trains that cycle in the middle of the large passenger flow during the peak period.

For example, during the early peak peak period, the demand for ride in the direction of Futian Port in Shenzhen Metro Line 4 is large. In order to accelerate the operation of the intermediate section, add an empty vehicle from the vehicle section or the nearby storage line. Driving density to relieve passenger flow pressure.

These temporary overtime and small road vehicles will not carry passengers before arriving at the designated site.

Line 4 is so crowded in the early morning peak, can you drive a few more overtime bus?

In fact, this overtime shuttle does not want to add a few times.

The drivers all know that the safety vehicle distance refers to the necessary safety distance that rear vehicles to maintain in order to avoid accidents with the front vehicles in front of the vehicle. The subway trains are running on the line. The safe distance between the two vehicles is based on the line speed limit, line slope, vehicle structure speed and automatic control characteristics of the train.

The subway must go through the process of accelerating → uniform speed → deceleration, and finally stop at station A.

Assuming that on the highway, the two cars were arranged back and forth at a speed of 80km/h. The two workshops did not maintain a safe distance. When the current car slows down, the rear car is easy to brake, causing rear -end accidents. The same is true for the subway.

Therefore, the core of the subway signal system, the automatic control of the train (ATC) system, monitor the running status and location of the train at all times, control the speed of the vehicle, and ensure that the train maintains a safe distance.

Working overtime and small traffic vehicles that are temporarily joined during the peak period must also maintain a safe distance from front and rear vehicles. For each additional overtime or small cross -road vehicle, it must go through fine operations and plans to avoid accidents.

To ensure a safe distance between trains, it is to ensure the safety of passengers and subway operations. Therefore, the number of trains operated on the subway line is limited, and you ca n’t want to add as much as overtime.

Finally, I remind everyone: Sweep the site code before entering the station, show the 48 -hour kernel certificate, and cooperate with a mild security check, and safely take the car.

Source | MTR Shenzhen Life

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