The share of back-to-back buses on a route that arrived much closer together than the timetable planned for those same two trips.
- 定义
- 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.
- 单位
- percent of judged pairs, with the count of pairs
- 人群
- Pairs of buses on the same route and direction that arrived one after the other at the same stop, from settled final predictions.
- 测量时段
- The 28 most recent completed service days, by calendar date in Ottawa.
- 覆盖范围
- 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.
- 发布资格
- 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.
- 范围
- 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).
- 这个数字可以说明什么
- A high share means buses often come together and then leave a longer wait behind them. It is not a count of late buses.
- 来源和标识
- 方法 · Daily reliability-pattern method
settled-reliability-patterns-daily-v2 - 当前 API · Bunching, slow segments and on-time by hour
reliability-patterns
- 方法 · Daily reliability-pattern method
实施状态
- 候选来源
- 已在此候选源中实现。
- 公开发布
- 此指标版本尚未在公开的正式运行环境中经过独立验证。
引用这个数字之前，请先阅读状态说明。
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.
排除项
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.
不确定性与解读
Arrival times are the last prediction made no earlier than 10 minutes before the scheduled time, not a recorded door opening.
当前证据
此指标没有已登记的详细记录。公开页面仍是当前的展示来源。
变更历史
此指标版本没有登记在案的重大变更记录。