2.2. Update Rules 2.2.1. Speed Update The speed of each vehicle according to the rules of Table 1 to update is as follows. Table 1 Speed update rules. 2.2.2. Location Update One has the following: Xn = Xn + Vn; Xn is the location of train n. 2.2.3. Color Update One has the following: if B(k) = 1 color(k) Topotecan solubility = “red”; else if B(k + 1) = 1 color(k) = “yellow”; else if B(k + 2) = 1 color(k) = “green-yellow”; else color(k) = “green”; end, where B(k) represents the state of block subsection
k, 1 is for the situation having train, and 0 is for the situation without train; color(k) represents the signal light color of the block subsection k. Furthermore, the factor of the intermediate stops with unlimited capacity is also
taken into account; that is, if the train needs to enter and stop, there are enough arrival and departure tracks for it. If the train that is getting nearer to the station needs to enter and stop, the train can directly enter the station if the conditions are met or else the train will have to stop in front of the station until the conditions are met; if the train only needs to go through the station, it can directly pass by the station. In addition, we also take the electric overhaul (every 20 hours) and maintenance (every 35 hours) time into consideration in this work. 3. Numerical Simulation and Analysis 3.1. Initialization of the Parameters There are six stations in the simulation system, where the first station is the departure station and the last one is the terminal station. Others are intermediate overtaking stations, and the intermediate stations have infinite arrival and departure tracks; that is, the station capacity is infinite. We assume that the length of the block subsection is 800 cells, the station spacing is 20km, the total length of the line is 100km, and the
length of the train is 600 cells; the departure interval Tint is 7min; there will be an electric overhaul every 20 hours and a maintenance every 35 hours, and every station will set Batimastat a 120min overhaul period. When the train is running through the terminal station, the train has pulled out of the analog system and the status of the train is no longer considered. The total number of the simulation steps is 259,200, namely, 72 hours. Trains in the departure station are allowed to depart in accordance with the time interval and safety conditions; trains in the intermediate stations can be allowed to depart as long as meeting the security conditions to start; if the station is in the maintenance period, trains cannot be allowed to depart.