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Bus route B12

Transport
B12
Usually an Alexander Dennis Adl Enviro 200.

No on-time figurewe can't yet publish a reliable on-time figure for route B12. Below is how long people waited, against what the timetable alone would give.

The last week, day by day
Chance of waiting more than ten minutes if you turn up at random.

Watch a day of route B12’s buses: every bus, replayed on the map. Or click a day on the chart.

The weekly figures

The chance of waiting more than ten minutes if you turn up at random.

Week endingtowards Erith Town Centre / Riversidetowards St Mary's Road
21 Jun 2025no datano data
28 Jun 202555%54%
5 Jul 202557% thin55% thin
12 Jul 2025no datano data
19 Jul 202555%53%
26 Jul 202556%55%
2 Aug 202556%55%
9 Aug 202557%55%
16 Aug 202557%55%
23 Aug 202556%54%
30 Aug 202557%57%
6 Sept 202556%55%
13 Sept 202556%55%
20 Sept 202556%55%
27 Sept 202556%55%
4 Oct 202557%56%
11 Oct 202555%55%
18 Oct 202555%55%
25 Oct 202555%54%
1 Nov 202555%55%
8 Nov 202557%55%
15 Nov 202556% thin53% thin
22 Nov 2025no datano data
29 Nov 2025no datano data
6 Dec 202558%57%
13 Dec 202556%56%
20 Dec 202557%55%
27 Dec 202558% thin58% thin
3 Jan 202658%59%
10 Jan 2026no datano data
17 Jan 2026no datano data
24 Jan 2026no datano data
31 Jan 202654%54%
7 Feb 202655%55%
14 Feb 2026no datano data
21 Feb 2026no datano data
28 Feb 2026no datano data
7 Mar 202654%53%
14 Mar 202659%58%
21 Mar 202656%55%
28 Mar 202656%55%
4 Apr 202656%55%
11 Apr 202659%60%
18 Apr 202655%55%
25 Apr 202656% thin55% thin
2 May 202657%56%
9 May 202657%56%
16 May 202656%55%
23 May 202656%56%
30 May 202659%58%
6 Jun 202657%55%
13 Jun 202656%55%
20 Jun 202658%57%
27 Jun 202657%55%
4 Jul 2026no datano data
11 Jul 202658%57%
18 Jul 202657%56%
25 Jul 202655%55%
1 Aug 2026no datano data
8 Aug 2026no datano data
15 Aug 2026no datano data
22 Aug 2026no datano data
29 Aug 2026no datano data
5 Sept 202657%56%
12 Sept 202657%56%
19 Sept 202660%60%
26 Sept 202656%55%
3 Oct 202657%56%
10 Oct 202655%56%
17 Oct 202655%55%

Waiting for a bus towards Erith Town Centre / Riverside, more than ten minutes goes by on about 55% of trips. Running exactly to the timetable it would be 54% of trips.

towards Erith Town Centre / Riverside
Wait > 10 min
55%timetable alone: 54%
Wait > 20 min
19%timetable alone: 13%
Wait > 30 min
3%timetable alone: 0%
1 in 20 wait over
28 min
Cut short
5.1% 20 of 395 journeys
towards St Mary's Road
Wait > 10 min
55%timetable alone: 53%
Wait > 20 min
18%timetable alone: 11%
Wait > 30 min
3%timetable alone: 0%
1 in 20 wait over
28 min
Cut short
27.3% 107 of 392 journeys

65 minutes was the longest gap between buses this week, at Bexley Park towards Erith Town Centre / Riverside, on Sunday 11 October from 12:34 to 13:39. This excludes any gaps caused by holes in our own data. Watch it happen →

When it goes wrong

Chance of waiting more than twenty minutes if you turn up at random, by time of day, averaged over the most recent weeks of data. The mark on each bar is the chance if everything ran to timetable.

  • Weekdays 05:00–07:00 26.0%
  • Weekdays 07:00–10:00 15.1%
  • Weekdays 10:00–16:00 10.7%
  • Weekdays 16:00–19:00 9.4%
  • Weekdays 19:00–24:00 26.3%
  • Saturdays 15.4%
  • Sundays and bank holidays 33.4%

Journeys cut short

Last week: 16.1% of journeys were turned back before the end of the line in the week ending 17 October 2026. Everyone on board has to get off; for anyone waiting further along the route it's effectively a cancellation.

towards Erith Town Centre / Riverside

Last week, 20 of 395 journeys (5%) were turned short.

  • Hail & Ride Victoria Road1.0 km short of the end 11
  • Bexley Park0.8 km short of the end 3
  • Hail & Ride Erith & District Hospital2.3 km short of the end 3
  • Shakespeare Road5.8 km short of the end 1
  • St Mary's Road6.4 km short of the end 1
  • Elsewhere along the route 1

towards St Mary's Road

Last week, 107 of 392 journeys (27%) were turned short.

  • Dartford Road / Baldwyns Park5.6 km short of the end 84
  • Bexley Park5.0 km short of the end 6
  • North Cray Road / Vicarage Road0.8 km short of the end 6
  • Vicarage Road0.6 km short of the end 5
  • Hail & Ride Parsonage Manorway Shops8.4 km short of the end 2
  • Elsewhere along the route 4

Each place is the last stop the bus was timed at before it turned round, with the typical distance it fell short of the end of the line. The five busiest are named; the rest are counted together.

Compared with TfL's own figures

QuarterTfLOurs
2025/26 Q313 Sept – 2 Jan 202680% on timeno figure
2026/27 Q11 Apr – 26 Jun 202680% on timeno figure

TfL's figures come from its own tracking equipment and its own timetable; mine are computed from the buses' public position feed. They are the same calculation on independent data, so they should broadly agree and move together rather than match exactly.

About this data
Data collected, week ending 17 October 2026
100% of the week. This is the share of the week for which we hold bus location data at all, across the whole of London rather than for this route. A week under 60% is not published; under 90% it is marked as thin.
Journeys observed
  • towards Erith Town Centre / Riverside: 395 journeys tracked across seven days
  • towards St Mary's Road: 392 journeys tracked across seven days
A guide to how much evidence sits behind this week's figures, not a measure of the service.
How it is measured
Every day, 05:00–23:59. Waits are measured along the route at TfL's timing points, in each direction, against the timetable — not at the ends of the route, where a bus turned back early counts as if it had run. This route runs to a timetable, but we can't yet publish a reliable on-time figure for it, so it is measured by how long people waited, as a frequent route is. A day with less than four hours of data collected shows no daily figure. How these figures are made.
Gaps in the record for this period (39)

Most recent first. Hover a week on the chart and it will name the gap behind it. Most are a few missing hours on an otherwise ordinary day.

  • 17 Sept 2026 partial day, no data 12:00-12:59: our collector was down (machine off or power cut)
  • 28 Aug 2026 partial day, no data 20:00-23:59: our collector was down (machine off or power cut)
  • 29 Jul – 26 Aug 2026 no collection: the volunteer BODS archive was down and our own collector had not yet started
  • 28 Jul 2026 partial day, no data 11:00-23:59: no collection: the volunteer BODS archive was down and our own collector had not yet started
  • 7 Jul 2026 partial day, no data 15:00-15:59: gap in the volunteer BODS archive (its collector was down)
  • 5 Jul 2026 partial day, no data 06:00-11:59: gap in the volunteer BODS archive (its collector was down)
  • 4 Jul 2026 partial day, no data 06:00-21:59: gap in the volunteer BODS archive (its collector was down)
  • 2 Jul – 3 Jul 2026 gap in the volunteer BODS archive (its collector was down)
  • 8 Jun 2026 partial day, no data 07:00-08:59: gap in the volunteer BODS archive (its collector was down)
  • 7 Jun 2026 partial day, no data 12:00-12:59, 18:00-19:59: gap in the volunteer BODS archive (its collector was down)
  • 6 Jun 2026 partial day, no data 12:00-12:59, 16:00-16:59, 18:00-18:59: gap in the volunteer BODS archive (its collector was down)
  • 27 Apr 2026 partial day, no data 12:00-12:59: gap in the volunteer BODS archive (its collector was down)
  • 21 Apr 2026 partial day, no data 06:00-11:59: gap in the volunteer BODS archive (its collector was down)
  • 20 Apr 2026 partial day, no data 15:00-23:59: gap in the volunteer BODS archive (its collector was down)
  • 16 Apr 2026 partial day, no data 12:00-15:59: gap in the volunteer BODS archive (its collector was down)
  • 28 Feb 2026 partial day, no data 06:00-18:59: gap in the volunteer BODS archive (its collector was down)
  • 16 Feb – 27 Feb 2026 gap in the volunteer BODS archive (its collector was down)
  • 15 Feb 2026 partial day, no data 16:00-23:59: gap in the volunteer BODS archive (its collector was down)
  • 30 Jan 2026 partial day, no data 20:00-23:59: gap in the volunteer BODS archive (its collector was down)
  • 25 Dec 2025 no bus service on Christmas Day
  • 23 Dec 2025 partial day, no data 06:00-07:59: gap in the volunteer BODS archive (its collector was down)
  • 5 Dec 2025 partial day, no data 06:00-08:59: gap in the volunteer BODS archive (its collector was down)
  • 24 Nov 2025 partial day, no data 17:00-17:59: gap in the volunteer BODS archive (its collector was down)
  • 17 Nov 2025 partial day, no data 06:00-09:59: gap in the volunteer BODS archive (its collector was down)
  • 15 Nov – 16 Nov 2025 no London vehicles in the national feed — TfL's export to BODS was down (the volunteer archive itself was collecting)
  • 14 Nov 2025 partial day, no data 06:00-07:59, 13:00-23:59: gap in the volunteer BODS archive (its collector was down)
  • 31 Oct 2025 partial day, no data 06:00-07:59: gap in the volunteer BODS archive (its collector was down)
  • 17 Oct 2025 partial day, no data 06:00-07:59: gap in the volunteer BODS archive (its collector was down)
  • 10 Oct 2025 partial day, no data 06:00-08:59: gap in the volunteer BODS archive (its collector was down)
  • 3 Oct 2025 partial day, no data 06:00-11:59: gap in the volunteer BODS archive (its collector was down)
  • 19 Sept 2025 partial day, no data 06:00-08:59: gap in the volunteer BODS archive (its collector was down)
  • 5 Sept 2025 partial day, no data 06:00-09:59: gap in the volunteer BODS archive (its collector was down)
  • 1 Aug 2025 partial day, no data 06:00-09:59: gap in the volunteer BODS archive (its collector was down)
  • 18 Jul 2025 partial day, no data 06:00-09:59: gap in the volunteer BODS archive (its collector was down)
  • 8 Jul 2025 partial day, no data 06:00-08:59: gap in the volunteer BODS archive (its collector was down)
  • 6 Jul – 7 Jul 2025 gap in the volunteer BODS archive (its collector was down)
  • 5 Jul 2025 partial day, no data 18:00-23:59: gap in the volunteer BODS archive (its collector was down)
  • 4 Jul 2025 partial day, no data 06:00-14:59: gap in the volunteer BODS archive (its collector was down)
  • 25 Jun 2025 partial day, no data 06:00-11:59: gap in the volunteer BODS archive (its collector was down)

For latest timetable and route information, see TfL's official page.

Contains public sector information licensed under the Open Government Licence v3.0; bus data via the DfT Bus Open Data Service and Transport for London. Figures are computed from observed bus positions, every day, 05:00–23:59. How these figures are made. Bus positions from the Department for Transport’s Bus Open Data Service (BODS); the Department for Transport cannot warrant the accuracy or quality of the data published there. Positions before September 2026 come from the Bus Open Data archive generously built and kept by Open Innovations, with thanks. Route lines and stops: Powered by TfL Open Data. Contains OS data © Crown copyright and database rights 2016. Geomni UK Map data © and database rights [2019]. These pages and the bus replay are built independently from open data: Transport for London, the Department for Transport and the bus operators had no part in making them, and none of them endorses them. Not for planning a journey.