M1 crash J23A northbound

Cleared Cleared at 09:33 on 14 Oct 2026, after 496 h 46 min.

Crash on the M1 northbound at J23A on Wednesday 23 September 2026, from 16:47. Cleared at 09:33 after 496 h 46 min. Timeline of reports from TomTom and the motorway signs.

1. !

   M1 northbound · J23A

   Collision

   Wed 16:47–09:33 (cleared after 496 h 46 min) · delay ~4 min · queue 3.0 mi

   TomTom ×3 · Motorway signs ×5

See the M1 on the live map M1 traffic now

Timeline

1. Wed 16:47 TomTom: queueing traffic, “Slow traffic”, delay ~5 min
2. Wed 17:21 Motorway signs: “REPORT OF OBSTRUCTION”
3. Wed 17:50 TomTom no longer reports it
4. Wed 17:56 Motorway signs no longer show “REPORT OF OBSTRUCTION”
5. Wed 17:56 All clear: no source reports it any more
6. Thu 07:34 Motorway signs: “REPORT OF OBSTRUCTION” (reported again)
7. Thu 08:04 Motorway signs no longer show “REPORT OF OBSTRUCTION”
8. Thu 08:04 All clear: no source reports it any more
9. Thu 13:05 Motorway signs: “REPORT OF OBSTRUCTION” (reported again)
10. Thu 13:35 Motorway signs no longer show “REPORT OF OBSTRUCTION”
11. Thu 13:35 All clear: no source reports it any more
12. Fri 11:40 Motorway signs: “REPORT OF OBSTRUCTION” (reported again)
13. Fri 12:10 Motorway signs no longer show “REPORT OF OBSTRUCTION”
14. Fri 12:10 All clear: no source reports it any more
15. Sun 12:00 Motorway signs: “REPORT OF OBSTRUCTION” (reported again)
16. Sun 12:30 Motorway signs no longer show “REPORT OF OBSTRUCTION”
17. Sun 12:30 All clear: no source reports it any more
18. Mon 07:35 Motorway signs: “REPORT OF OBSTRUCTION” (reported again)
19. Mon 08:05 Motorway signs no longer show “REPORT OF OBSTRUCTION”
20. Mon 08:05 All clear: no source reports it any more
21. Mon 17:07 Motorway signs: “REPORT OF OBSTRUCTION” (reported again)
22. Mon 17:37 Motorway signs no longer show “REPORT OF OBSTRUCTION”
23. Mon 17:37 All clear: no source reports it any more
24. Thu 07:52 Motorway signs: “REPORT OF OBSTRUCTION” (reported again)
25. Thu 08:22 Motorway signs no longer show “REPORT OF OBSTRUCTION”
26. Thu 08:22 All clear: no source reports it any more
27. Thu 10:52 Motorway signs: “REPORT OF OBSTRUCTION” (reported again)
28. Thu 11:23 Motorway signs no longer show “REPORT OF OBSTRUCTION”
29. Thu 11:23 All clear: no source reports it any more
30. Fri 07:59 Motorway signs: “REPORT OF OBSTRUCTION” (reported again)
31. Fri 08:29 Motorway signs no longer show “REPORT OF OBSTRUCTION”
32. Fri 08:29 All clear: no source reports it any more
33. Fri 09:30 Motorway signs: “REPORT OF OBSTRUCTION” (reported again)
34. Fri 10:00 Motorway signs no longer show “REPORT OF OBSTRUCTION”
35. Fri 10:00 All clear: no source reports it any more
36. Fri 14:01 Motorway signs: “REPORT OF OBSTRUCTION” (reported again)
37. Fri 14:24 TomTom: queueing traffic, “Slow traffic”, delay ~6 min
38. Fri 14:29 TomTom: delay now ~11 min (was ~6)
39. Fri 14:31 Motorway signs no longer show “REPORT OF OBSTRUCTION”
40. Fri 14:43 TomTom: delay now ~20 min (was ~8), “Queuing traffic”
41. Fri 14:52 TomTom: “Slow traffic”
42. Fri 14:57 TomTom: “Queuing traffic”
43. Fri 15:53 Motorway signs: “REPORT OF DEBRIS”
44. Fri 16:32 Motorway signs no longer show “REPORT OF DEBRIS”
45. Fri 16:43 TomTom: “Slow traffic”
46. Fri 16:47 TomTom: delay now ~8 min (was ~17)
47. Fri 16:47 TomTom: queueing traffic, “Queuing traffic”, delay ~9 min
48. Fri 17:01 TomTom: queueing traffic, “Slow traffic”, delay ~3 min (reported again)
49. Fri 17:10 TomTom: “Queuing traffic”
50. Fri 17:15 TomTom: “Slow traffic”
51. Fri 17:43 TomTom no longer reports it
52. Fri 17:43 All clear: no source reports it any more
53. Fri 19:33 Motorway signs: “REPORT OF OBSTRUCTION” (reported again)
54. Fri 19:40 Motorway signs no longer show “REPORT OF OBSTRUCTION”
55. Fri 19:40 All clear: no source reports it any more
56. Sun 18:18 Motorway signs: “REPORT OF OBSTRUCTION” (reported again)
57. Sun 18:48 Motorway signs no longer show “REPORT OF OBSTRUCTION”
58. Sun 18:48 All clear: no source reports it any more
59. Sun 22:49 Motorway signs: “REPORT OF OBSTRUCTION” (reported again)
60. Sun 23:19 Motorway signs no longer show “REPORT OF OBSTRUCTION”
61. Sun 23:19 All clear: no source reports it any more
62. Mon 07:51 Motorway signs: “REPORT OF OBSTRUCTION” (reported again)
63. Mon 08:21 Motorway signs no longer show “REPORT OF OBSTRUCTION”
64. Mon 08:21 All clear: no source reports it any more
65. Mon 13:23 Motorway signs: “REPORT OF OBSTRUCTION” (reported again)
66. Mon 13:53 Motorway signs no longer show “REPORT OF OBSTRUCTION”
67. Mon 13:53 All clear: no source reports it any more
68. Mon 15:23 Motorway signs: “REPORT OF OBSTRUCTION” (reported again)
69. Mon 15:33 Motorway signs: “REPORT OF PEDESTRIANS”
70. Mon 15:53 Motorway signs no longer show “REPORT OF OBSTRUCTION”
71. Mon 16:24 Motorway signs no longer show “REPORT OF PEDESTRIANS”
72. Mon 16:24 All clear: no source reports it any more
73. Tue 07:58 Motorway signs: “REPORT OF OBSTRUCTION” (reported again)
74. Tue 08:58 Motorway signs no longer show “REPORT OF OBSTRUCTION”
75. Tue 08:58 All clear: no source reports it any more
76. Tue 12:59 Motorway signs: “REPORT OF OBSTRUCTION” (reported again)
77. Tue 13:29 Motorway signs no longer show “REPORT OF OBSTRUCTION”
78. Tue 13:29 All clear: no source reports it any more
79. Tue 13:59 Motorway signs: “REPORT OF OBSTRUCTION” (reported again)
80. Tue 14:29 Motorway signs no longer show “REPORT OF OBSTRUCTION”
81. Tue 14:29 All clear: no source reports it any more
82. Fri 22:41 Motorway signs: “REPORT OF DEBRIS” (reported again)
83. Fri 23:11 Motorway signs no longer show “REPORT OF DEBRIS”
84. Fri 23:11 All clear: no source reports it any more
85. yesterday 07:27 Motorway signs: “REPORT OF OBSTRUCTION” (reported again)
86. yesterday 07:57 Motorway signs no longer show “REPORT OF OBSTRUCTION”
87. yesterday 07:57 All clear: no source reports it any more
88. 07:33 Motorway signs: “REPORT OF OBSTRUCTION” (reported again)
89. 07:50 Motorway signs: “OBSTRUCTION ON SLIP ROAD”
90. 08:03 Motorway signs no longer show “REPORT OF OBSTRUCTION”
91. 08:24 Motorway signs: “COLLISION SLOW DOWN”
92. 09:03 Motorway signs no longer show “COLLISION SLOW DOWN”
93. 09:33 Motorway signs no longer show “OBSTRUCTION ON SLIP ROAD”
94. 09:33 All clear: no source reports it any more

What the sources said

• Slow traffic
• Overhead signs read “REPORT OF OBSTRUCTION” (2 signs; furthest along: M1 northbound between J23A and J24).
• Overhead signs read “REPORT OF DEBRIS” (6 signs; furthest along: M1 J24 southbound exit).
• Overhead signs read “REPORT OF PEDESTRIANS” (5 signs; furthest along: M1 northbound within J23A).
• Overhead signs read “OBSTRUCTION ON SLIP ROAD” (1 sign; furthest along: M1 northbound between J23 and J23A).
• Overhead signs read “COLLISION SLOW DOWN” (1 sign; furthest along: M1 northbound within J23A).

Other recent incidents on the M1

• M1 crash J9–J10 · yesterday 21:47, cleared after 1 h 33 min
• M1 crash J33–J34 northbound · yesterday 17:38, cleared after 1 h 52 min
• M1 crash J21A–J22 · yesterday 16:34, cleared after 2 h 4 min
• M1 closed J33–J32 southbound · yesterday 16:27, cleared after 2 h 12 min
• M1 crash J8–J9 northbound · yesterday 16:25, cleared after 6 h 35 min
• M1 closed J31 northbound · yesterday 15:57, cleared after 2 h 13 min
• M1 stopped traffic J22–J23 · yesterday 08:22, cleared after 32 min
• M1 crash J8 southbound · Mon 14:38, cleared after 44 min
• M1 crash J31–J32 northbound · Mon 13:35, cleared after 47 min
• M1 crash J32–J33 northbound · Mon 09:57, cleared after 2 h 55 min

About this page

This page shows what the data sources reported about this event and when, merged from every source that reported it at the same place. It doesn't say what caused it or whether anyone was hurt: no source reports that. Times are UK time. For live alerts, follow @motorways.me on Bluesky.