The share of back-to-back buses on a route that arrived much closer together than the timetable planned for those same two trips.
- 定義
- The share of back-to-back buses on a route that arrived much closer together than the timetable planned for those same two trips.
- 公式
- 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.
- 單位
- percent of judged pairs, with the count of pairs
- 對象群體
- Pairs of buses on the same route and direction that arrived one after the other at the same stop, from settled final predictions.
- 測量期間
- The 28 most recent completed service days, by calendar date in Ottawa.
- 涵蓋範圍
- 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.
- 發布資格
- 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.
- 範圍
- 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).
- 這個數字可以說明什麼
- A high share means buses often come together and then leave a longer wait behind them. It is not a count of late buses.
- 來源與識別碼
- 方法 · Daily reliability-pattern method
settled-reliability-patterns-daily-v2 - 目前 API · Bunching, slow segments and on-time by hour
reliability-patterns
- 方法 · Daily reliability-pattern method
實施狀態
- 候選來源
- 已在此來源候選版本中實施。
- 公開製作
- 此指標版本尚未在公開的正式環境中經過獨立驗證。
引用此數字前，請先閱讀狀態說明。
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.
排除項目
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.
不確定性與解讀
Arrival times are the last prediction made no earlier than 10 minutes before the scheduled time, not a recorded door opening.
目前數據
此指標沒有已登記的深入查看紀錄。公開頁面仍是目前的呈現來源。
變更紀錄
此指標版本沒有已登記的重大變更紀錄。