A1 | Cambridgeshire | Carriageway Closure | Expect Delays

Incident timeline

1. 03:34, 28 JulFirst report

   The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

2. 05:50, 28 JulUpdate

   The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

3. 06:20, 28 JulUpdate

   ⏱ Still active — no changes from National Highways. Incident ongoing for 2h 45m. Monitoring continues.

4. 06:25, 28 JulUpdate

   The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

5. 07:00, 28 JulUpdate

   ⏱ Still active — no changes from National Highways. Incident ongoing for 3h 25m. Monitoring continues.

6. 07:05, 28 JulUpdate

   The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

7. 07:35, 28 JulUpdate

   ⏱ Still active — no changes from National Highways. Incident ongoing for 4h 0m. Monitoring continues.

8. 07:40, 28 JulUpdate

   The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

9. 08:10, 28 JulUpdate

   ⏱ Still active — no changes from National Highways. Incident ongoing for 4h 35m. Monitoring continues.

10. 08:15, 28 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

11. 08:45, 28 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 5h 10m. Monitoring continues.

12. 08:50, 28 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

13. 09:20, 28 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 5h 45m. Monitoring continues.

14. 09:25, 28 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

15. 10:00, 28 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 6h 25m. Monitoring continues.

16. 10:05, 28 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

17. 10:35, 28 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 7h 0m. Monitoring continues.

18. 10:40, 28 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

19. 11:10, 28 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 7h 35m. Monitoring continues.

20. 11:15, 28 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

21. 11:50, 28 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 8h 15m. Monitoring continues.

22. 11:55, 28 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

23. 12:25, 28 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 8h 50m. Monitoring continues.

24. 12:30, 28 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

25. 13:00, 28 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 9h 25m. Monitoring continues.

26. 13:05, 28 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

27. 13:35, 28 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 10h 0m. Monitoring continues.

28. 13:40, 28 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

29. 14:10, 28 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 10h 35m. Monitoring continues.

30. 14:15, 28 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

31. 14:45, 28 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 11h 10m. Monitoring continues.

32. 14:50, 28 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

33. 15:20, 28 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 11h 45m. Monitoring continues.

34. 15:25, 28 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

35. 15:55, 28 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 12h 20m. Monitoring continues.

36. 16:00, 28 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

37. 16:35, 28 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 13h 0m. Monitoring continues.

38. 16:40, 28 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

39. 17:10, 28 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

40. 17:40, 28 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 14h 5m. Monitoring continues.

41. 17:45, 28 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

42. 18:15, 28 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 14h 40m. Monitoring continues.

43. 18:20, 28 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

44. 18:50, 28 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 15h 15m. Monitoring continues.

45. 18:55, 28 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

46. 19:25, 28 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 15h 50m. Monitoring continues.

47. 19:30, 28 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

48. 20:00, 28 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 16h 25m. Monitoring continues.

49. 20:05, 28 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

50. 20:35, 28 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 17h 0m. Monitoring continues.

51. 20:40, 28 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

52. 21:10, 28 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 17h 35m. Monitoring continues.

53. 21:15, 28 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

54. 21:45, 28 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 18h 10m. Monitoring continues.

55. 21:50, 28 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

56. 22:20, 28 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 18h 45m. Monitoring continues.

57. 22:25, 28 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

58. 23:00, 28 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 19h 25m. Monitoring continues.

59. 23:05, 28 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

60. 23:35, 28 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 20h 0m. Monitoring continues.

61. 23:40, 28 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

62. 00:10, 29 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 20h 35m. Monitoring continues.

63. 00:15, 29 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

64. 00:45, 29 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 21h 10m. Monitoring continues.

65. 00:50, 29 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

66. 01:20, 29 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 21h 45m. Monitoring continues.

67. 01:25, 29 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

68. 01:55, 29 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 22h 20m. Monitoring continues.

69. 02:00, 29 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

70. 02:35, 29 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 23h 0m. Monitoring continues.

71. 02:40, 29 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

72. 03:15, 29 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 23h 40m. Monitoring continues.

73. 03:20, 29 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

74. 03:50, 29 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 24h 15m. Monitoring continues.

75. 03:55, 29 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

76. 04:30, 29 JulUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 24h 55m. Monitoring continues.

77. 04:35, 29 JulUpdate

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

78. 05:05, 29 JulUpdate

    ✅ Incident cleared — A1 reopened at 05:05 on 29 Jul 2026. Total disruption: 25h 30m. All lanes open, traffic returning to normal.

79. 13:59, 6 NovFinal update

    The A1 in Cambridgeshire is closed northbound between J17 of the A1(M) (near Peterborough A1139) and the A47 (near Wansford) following a serious collision.

Wording from National Highways, recorded as it changed.

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