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The share of back-to-back buses on a route that arrived much closer together than the timetable planned for those same two trips.

Definición
The share of back-to-back buses on a route that arrived much closer together than the timetable planned for those same two trips.
Fórmula
At each stop, buses of one route and direction are put in the order they arrived. For each pair, the observed gap is compared with the scheduled gap between the same two trips. Bunched: observed gap under 0.25 times the scheduled gap. Long gap: over 1.75 times. Share = bunched pairs divided by judged pairs.
Unidades
percent of judged pairs, with the count of pairs
Población
Pairs of buses on the same route and direction that arrived one after the other at the same stop, from settled final predictions.
Ventana de medición
The 28 most recent completed service days, by calendar date in Ottawa.
Cobertura
Only days the daily rollup computed. Days with partial feed capture and days when the live trip numbers did not match the timetable are left out and listed.
Elegibilidad para publicar
A pair is judged only when the timetable planned 2 to 30 minutes between those two trips. A route needs at least 30 judged pairs before a share is shown.
Alcance
Every bus route with judged pairs, by hour band: early 4 to 6, morning rush 6 to 9, midday 9 to 15, afternoon rush 15 to 18, evening 18 to 22, night 22 to 4 (Ottawa time).
Qué puede respaldar este número
A high share means buses often come together and then leave a longer wait behind them. It is not a count of late buses.
Fuentes e identificadores

Estado de implementación

Fuente candidata
Implementado en esta fuente candidata.
Producción pública
Esta versión de la métrica no ha sido verificada de forma independiente en el sitio público.

Lee el estado antes de citar este número.

The daily calculation is implemented in this source candidate (worker rollup, migrations 0396 and 0407, method settled-reliability-patterns-daily-v2). Public production verification for this version is not yet recorded.

Exclusiones

OC Transpo O-Train lines are left out: the operator publishes no live train positions, so their arrivals repeat the timetable.

Comparing each pair with its own planned gap means an unseen bus in between, or a bus passing another, does not create a false bunch.

Incertidumbre e interpretación

Arrival times are the last prediction made no earlier than 10 minutes before the scheduled time, not a recorded door opening.

Datos probantes actuales

No hay un registro de detalle disponible para esta métrica. La página pública sigue siendo la fuente de la presentación actual.

Historial de cambios

No hay ningún cambio importante registrado para esta versión de la métrica.