Interchange Transfer Matrix · Step-Free Lift & Concourse Links
London Interchange Walk-Time & Step-Free Matrix
TfL-seeded and warehouse-calibrated transfer walking times often decide whether a one-change route beats a direct line. In the Tube Hound warehouse router (`walk` table), Bank ↔ Monument costs 4 minutes (240 seconds) via the subterranean travolator and escalator link, and Hammersmith (Piccadilly/District ↔ Hammersmith & City/Circle) costs 4 minutes (240 seconds) across Hammersmith Broadway. Transfers at King's Cross St. Pancras, Paddington (Bakerloo, Circle, District, and Hammersmith & City ↔ Elizabeth line), Waterloo, Liverpool Street (Tube ↔ Elizabeth line), Stratford, and Euston each cost 3 minutes (180 seconds). When `step_free: true` is requested, the router checks live TfL lift disruptions (`lifts` slice) and avoids any interchange with an out-of-service lift.
| Interchange Hub | Walk Time | Corridor / Link Type | Lines Served | Step-Free & Lift Routing Note |
|---|---|---|---|---|
| Bank ↔ Monument Central / Northern / W&C / DLR ↔ District & Circle | 4 min (240s) | Subterranean travolator & escalator link (240s router transfer) | Central, Northern, Waterloo & City, DLR, District, Circle | Step-free on DLR, Northern & Waterloo & City (weekday Walbrook lifts); Central/Monument transfer uses escalators. |
| King's Cross St. Pancras Deep-level Tube ↔ Sub-surface & National Rail | 3 min (180s) | Internal lift & escalator concourse (180s router transfer) | Circle, H&C, Metropolitan, Northern, Piccadilly, Victoria | Step-free street-to-platform on all 6 Underground lines via Northern & Western ticket halls. |
| Paddington (Tube ↔ Elizabeth line) Bakerloo / Circle / District ↔ Elizabeth line | 3 min (180s) | Eastbourne Terrace / Lawn concourse link (180s router transfer) | Bakerloo, Circle, District, H&C, Elizabeth line | Step-free on Elizabeth line, H&C and Circle/District; Bakerloo uses escalators. |
| Waterloo Jubilee ↔ Northern / Bakerloo / Waterloo & City | 3 min (180s) | Moving-walkway link between Jubilee and Northern/Bakerloo (180s router transfer) | Bakerloo, Jubilee, Northern, Waterloo & City | Step-free on Jubilee line and Waterloo & City (mainline ramp); Bakerloo & Northern use escalators. |
| Liverpool Street (Tube ↔ Elizabeth line) Central / Sub-surface ↔ Elizabeth line & Weaver | 3 min (180s) | Direct underground Broadgate & Moorgate-spanning concourse (180s router transfer) | Central, Circle, H&C, Metropolitan, Elizabeth line, Weaver | Step-free on Elizabeth line, Weaver, and Circle, Hammersmith & City, and Metropolitan platforms (Central line uses escalators). |
| Stratford (Tube ↔ Elizabeth / DLR / Overground) Central / Jubilee ↔ Elizabeth line, DLR & Mildmay | 3 min (180s) | Cross-platform Eastbound Central/Elizabeth & subway links (180s router transfer) | Central, Jubilee, Elizabeth line, DLR, Mildmay | Step-free level & lift access across all platforms; check live lift status before travelling. |
| Hammersmith (Piccadilly/District ↔ H&C/Circle) Broadway ticket hall ↔ Beadon Road ticket hall | 4 min (240s) | Out-of-station street walk across Hammersmith Broadway (240s router transfer) | Piccadilly, District, Hammersmith & City, Circle | Step-free street-to-platform in both stations; street crossing between ticket halls. |
| Euston Victoria ↔ Northern (Bank & Charing Cross branches) | 3 min (180s) | Cross-platform Victoria/Northern (Bank branch) & subway (180s router transfer) | Northern, Victoria, Lioness (Overground) | Step-free on Victoria line, Northern line (Bank branch), and Lioness/Mainline; Charing Cross branch uses escalators. |
Router note: Same-station platform changes not listed above default to 180 seconds (`DEFAULT_TRANSFER_S`), plus a 600-second change penalty in `fast` mode and an 1,800-second change penalty in `calm` (fewer-changes) mode.
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