Table 1.

Meaning of symbols

SymbolsMeaning
aRunning activity
ASet of all running activities
TdpaRunning activity a planned departure time
TapaRunning activity a planned arrival time
TdraRunning activity a actual departure time
TaraRunning activity a actual arrival time
faRunning activity a priority parameter
N(a)Running activity a next running activity
Sd(a)Running activity a departure station
Sa(a)Running activity a arrival station
TraRunning activity a section minimum running time
TsaRunning activity a station minimum stop time
saLine started station
seLine terminal station
IdMinimum departure interval
IaMinimum arrival interval
IadMinimum departure and arrival interval
Te1Start time of section passing capacity failure
Te2Recover time of section passing capacity
Se1Station 1 corresponding to the section where the passing capacity is invalid
Se2Station 2 corresponding to the section where the passing capacity is invalid
θa,a'Running activity a and a’ whether overtaking 0–1variable
ωa,a'Running activity a and a’ whether meet the arrival and departure
interval 0-1variable
xa,ya,za0-1 variable
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