Trimtabist
The US Trade Ledger — every US container gateway, every partner country, every month. Census-recorded, AIS-verified.
TT-009 · Berth queueing

Average waiting rate by gateway

tt009.gateway.waiting-rate observed

Sum of waiting hours divided by sum of hours alongside berth — UNCTAD (1983), codified as World Bank Transport PS-6 (Chung, 1993) indicator 6. Design range 0.05-0.20, PIANC about 0.165. An aggregate ratio, never an average of ratios.

Withdrawn from publication

THREE OPEN BLOCKERS. (1) Right-censoring deletes the longest waits and the bias grows with congestion. (2) Not reconciled against the World Bank CPPI annex, whose published berth-share converts arithmetically to this same rate. (3) The fleet-mix check is unrun: waiting falls with ship size while service time rises, so this could measure fleet composition rather than port performance. See berthing/PHASES.md.

· from 1970-01-01 · open-ended · the data is not served while this stands.

Unit
ratio
Grade
observed
Horizon
medium
Covers
2026-07-26 → now

Own-recorded live from terrestrial AIS (aisstream.io receiver network); the recording, timestamps and event derivation are ours. Source: undefined.

Cite this

Trimtab TT-009 Berth queueing, "Average waiting rate by gateway" (retrieved 2026-08-06).
Trimtabist TT-009 Berth queueing, own AIS receivers, 10 US container gateways. Method: berthing/METHOD.md. Grade: observed.
Licence CC BY 4.0

Machine readable

Updated: 2026-08-06 (regenerated on every request from the live registry)
/series/tt009.gateway.waiting-rate.csv — tidy long format
/series/tt009.gateway.waiting-rate.metadata.json — provenance, coverage, citation
POST /mcp — query_series, describe_series