Purpose and scope
What this timeline establishes
Calculate the latest departure that still reaches a destination by a required time.
The Last-Train Departure Planner calculates checkpoints from Required destination arrival, Train journey minutes, Transfer minutes, Station-entry buffer minutes, and Final walk minutes; Carry Final walk minutes separate from internal buffers.
Instructions
How to use this calculator
Supply Required destination arrival and Train journey minutes as the Last-Train Departure Planner control point, then carry Transfer minutes, Station-entry buffer minutes, and Final walk minutes tied to the applicable planning source.
- Supply Required destination arrival and Train journey minutes as the controlling Last-Train Departure Planner endpoint.
- Supply Transfer minutes, Station-entry buffer minutes, and Final walk minutes from the applicable planning source.
- Calculate the Last-Train Departure Planner checkpoints, then audit Final walk minutes in chronological order.
- Confirm the unit and convention for Final walk minutes before accepting the Last-Train Departure Planner result.
Calculation
Method used
Journey, transfer, entry, and final-walk durations are subtracted from the required arrival.
The Last-Train Departure Planner applies Required destination arrival, Train journey minutes, and Transfer minutes in sequence; audit the Final walk minutes allowance at each checkpoint.
Calculation method last reviewed: June 21, 2026.
Visual audit
Reading the calculated timeline
The Last-Train Departure Planner timeline calculates checkpoints from Required destination arrival, Train journey minutes, Transfer minutes, Station-entry buffer minutes, and Final walk minutes. Audit Final walk minutes from the anchor toward the endpoint carrying the consequence.
Interpretation
Interpreting the calculated date and buffers
The result provides a timing target and does not confirm that a train actually operates at that time.
Audit the Last-Train Departure Planner deadline separately from Final walk minutes; internal buffers remain adjustable unless the planning source fixes them.
For a separate check, the Train Transfer Buffer Calculator is designed to compare a rail connection with walking, delay, and boarding allowances.
Worked scenario
Example calculation
Match the Last-Train Departure Planner control event with Required destination arrival and Train journey minutes, then audit each Final walk minutes adjustment.
Boundaries
Important edge cases and limitations
Published timetables, service disruption, platform access, and last-service rules must be checked separately.
Adjust the Last-Train Departure Planner allowance when Final walk minutes differs from the planning source rule; calculate its dependent checkpoints again.
Practical use
Recommended workflow
Match the target against the published timetable and retain an earlier fallback service.
Input audit
Checklist for this calculation
- Audit the Last-Train Departure Planner control point in Required destination arrival and Train journey minutes.
- Carry Final walk minutes separate from discretionary buffers.
- Match the earliest Last-Train Departure Planner checkpoint with its endpoint.
- Carry Transfer minutes, Station-entry buffer minutes, and Final walk minutes beside the Last-Train Departure Planner; include Final walk minutes in any saved or shared record.
Questions
Frequently asked questions
Why include the final walk in a train calculation?
The required arrival is usually at the true destination, not the destination station platform.
Should Required destination arrival or Final walk minutes control the last-train departure planner timeline?
Supply Required destination arrival as the Last-Train Departure Planner control point, then audit Final walk minutes separately. Carry Last-Train Departure Planner Final walk minutes reminders provisional unless the planning source fixes their timing.
Which inputs make a last-train departure planner result reproducible?
Another reviewer needs Required destination arrival and Train journey minutes and Transfer minutes, Station-entry buffer minutes, and Final walk minutes to recreate the Last-Train Departure Planner. Store those values with their units and generation date.
What event should trigger another last-train departure planner calculation?
Reconsider the Last-Train Departure Planner when Final walk minutes no longer matches the source used for Required destination arrival. A new calculation keeps the cases separate.