🚆 Railways & Public Transport · State Machine
Train Ticket (PNR) Status
The states of a train ticket from booking to journey, including RAC and waitlist confirmation and cancellation.
Drawing diagram…
What this diagram shows
- Waitlisted tickets move up as others cancel
- RAC gives a shared berth before full confirmation
- Unconfirmed e-tickets are cancelled automatically at chart time
Prompt used
State machine for a PNR: Booked as Confirmed, RAC or Waitlisted. Waitlisted can move to RAC or Confirmed on cancellations. At chart preparation, still-waitlisted e-tickets are Cancelled with an automatic refund. Confirmed and RAC tickets become Travelled after the journey, or Cancelled by the passenger with a refund.
Mermaid code
stateDiagram-v2 [*] --> Confirmed: Seat available [*] --> RAC: Shared berth only [*] --> Waitlisted: No seat Waitlisted --> RAC: Cancellations Waitlisted --> Confirmed: Cancellations RAC --> Confirmed: Cancellations Waitlisted --> AutoCancelled: Chart prepared, still waitlisted Confirmed --> Cancelled: Passenger cancels RAC --> Cancelled: Passenger cancels Confirmed --> Travelled: Journey done RAC --> Travelled: Journey done AutoCancelled --> [*] Cancelled --> [*] Travelled --> [*]
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