M40 J4 northbound exit | Northbound | Congestion

Incident timeline

1. 11:30, 29 JunFirst report

   Location : The M40 northbound exit slip at junction J4 .
   Reason : Congestion.
   Status : Currently Active.
   Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
   Delay : There are currently delays of 10 minutes against expected traffic.

2. 11:35, 29 JunUpdate

   Location : The M40 northbound exit slip at junction J4 .
   Reason : Congestion.
   Status : Currently Active.
   Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
   Delay : There are currently delays of 10 minutes against expected traffic.

3. 12:10, 29 JunUpdate

   ⏱ Still active — no changes from National Highways. Incident ongoing for 40 minutes. Delays of 10 minutes still recorded. Monitoring continues.

4. 12:15, 29 JunUpdate

   Location : The M40 northbound exit slip at junction J4 .
   Reason : Congestion.
   Status : Currently Active.
   Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
   Delay : There are currently delays of 10 minutes against expected traffic.

5. 12:45, 29 JunUpdate

   ⏱ Still active — no changes from National Highways. Incident ongoing for 1h 15m. Delays of 10 minutes still recorded. Monitoring continues.

6. 12:50, 29 JunUpdate

   Location : The M40 northbound exit slip at junction J4 .
   Reason : Congestion.
   Status : Currently Active.
   Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
   Delay : There are currently delays of 10 minutes against expected traffic.

7. 13:25, 29 JunUpdate

   ⏱ Still active — no changes from National Highways. Incident ongoing for 1h 55m. Delays of 10 minutes still recorded. Monitoring continues.

8. 13:30, 29 JunUpdate

   Location : The M40 northbound exit slip at junction J4 .
   Reason : Congestion.
   Status : Currently Active.
   Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
   Delay : There are currently delays of 10 minutes against expected traffic.

9. 14:00, 29 JunUpdate

   ⏱ Still active — no changes from National Highways. Incident ongoing for 2h 30m. Delays of 10 minutes still recorded. Monitoring continues.

10. 14:05, 29 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

11. 14:35, 29 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 3h 5m. Delays of 10 minutes still recorded. Monitoring continues.

12. 14:40, 29 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

13. 15:15, 29 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 3h 45m. Delays of 10 minutes still recorded. Monitoring continues.

14. 15:20, 29 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

15. 15:50, 29 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 4h 20m. Delays of 10 minutes still recorded. Monitoring continues.

16. 15:55, 29 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

17. 16:25, 29 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 4h 55m. Delays of 10 minutes still recorded. Monitoring continues.

18. 16:30, 29 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

19. 18:55, 29 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 7h 25m. Delays of 10 minutes still recorded. Monitoring continues.

20. 19:00, 29 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

21. 19:30, 29 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 8h 0m. Delays of 10 minutes still recorded. Monitoring continues.

22. 19:35, 29 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

23. 20:05, 29 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 8h 35m. Delays of 10 minutes still recorded. Monitoring continues.

24. 20:10, 29 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

25. 20:40, 29 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 9h 10m. Delays of 10 minutes still recorded. Monitoring continues.

26. 20:45, 29 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

27. 21:15, 29 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 9h 45m. Delays of 10 minutes still recorded. Monitoring continues.

28. 21:20, 29 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

29. 21:55, 29 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 10h 25m. Delays of 10 minutes still recorded. Monitoring continues.

30. 22:00, 29 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

31. 22:35, 29 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 11h 5m. Delays of 10 minutes still recorded. Monitoring continues.

32. 22:40, 29 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

33. 23:10, 29 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 11h 40m. Delays of 10 minutes still recorded. Monitoring continues.

34. 23:15, 29 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

35. 23:45, 29 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 12h 15m. Delays of 10 minutes still recorded. Monitoring continues.

36. 23:50, 29 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

37. 00:20, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 12h 50m. Delays of 10 minutes still recorded. Monitoring continues.

38. 00:25, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

39. 00:55, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 13h 25m. Delays of 10 minutes still recorded. Monitoring continues.

40. 01:00, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

41. 01:30, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 14h 0m. Delays of 10 minutes still recorded. Monitoring continues.

42. 01:35, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

43. 02:05, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 14h 35m. Delays of 10 minutes still recorded. Monitoring continues.

44. 02:10, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

45. 02:40, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 15h 10m. Delays of 10 minutes still recorded. Monitoring continues.

46. 02:45, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

47. 03:20, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 15h 50m. Delays of 10 minutes still recorded. Monitoring continues.

48. 03:25, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

49. 03:55, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 16h 25m. Delays of 10 minutes still recorded. Monitoring continues.

50. 04:00, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

51. 04:30, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 17h 0m. Delays of 10 minutes still recorded. Monitoring continues.

52. 04:35, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

53. 05:10, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 17h 40m. Delays of 10 minutes still recorded. Monitoring continues.

54. 05:15, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

55. 05:45, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 18h 15m. Delays of 10 minutes still recorded. Monitoring continues.

56. 05:50, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

57. 06:20, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 18h 50m. Delays of 10 minutes still recorded. Monitoring continues.

58. 06:25, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

59. 06:55, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 19h 25m. Delays of 10 minutes still recorded. Monitoring continues.

60. 07:00, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

61. 07:30, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 20h 0m. Delays of 10 minutes still recorded. Monitoring continues.

62. 07:35, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

63. 10:50, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 23h 20m. Delays of 10 minutes still recorded. Monitoring continues.

64. 10:55, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

65. 11:25, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 23h 55m. Delays of 10 minutes still recorded. Monitoring continues.

66. 11:30, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

67. 12:00, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 24h 30m. Delays of 10 minutes still recorded. Monitoring continues.

68. 12:05, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

69. 12:35, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 25h 5m. Delays of 10 minutes still recorded. Monitoring continues.

70. 12:40, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

71. 13:10, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 25h 40m. Delays of 10 minutes still recorded. Monitoring continues.

72. 13:15, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

73. 13:45, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 26h 15m. Delays of 10 minutes still recorded. Monitoring continues.

74. 13:50, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

75. 14:20, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 26h 50m. Delays of 10 minutes still recorded. Monitoring continues.

76. 14:25, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

77. 14:55, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 27h 25m. Delays of 10 minutes still recorded. Monitoring continues.

78. 15:00, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

79. 15:35, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 28h 5m. Delays of 10 minutes still recorded. Monitoring continues.

80. 15:40, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

81. 16:10, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 28h 40m. Delays of 10 minutes still recorded. Monitoring continues.

82. 16:15, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

83. 16:50, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 29h 20m. Delays of 10 minutes still recorded. Monitoring continues.

84. 16:55, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

85. 17:30, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 30h 0m. Delays of 10 minutes still recorded. Monitoring continues.

86. 17:35, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

87. 18:05, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 30h 35m. Delays of 10 minutes still recorded. Monitoring continues.

88. 18:10, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

89. 18:45, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 31h 15m. Delays of 10 minutes still recorded. Monitoring continues.

90. 18:50, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

91. 19:20, 30 JunUpdate

    ⏱ Still active — no changes from National Highways. Incident ongoing for 31h 50m. Delays of 10 minutes still recorded. Monitoring continues.

92. 19:25, 30 JunUpdate

    Location : The M40 northbound exit slip at junction J4 .
    Reason : Congestion.
    Status : Currently Active.
    Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 29 June 2026.
    Delay : There are currently delays of 10 minutes against expected traffic.

Wording from National Highways, recorded as it changed.

More on the M40

• M40M40 - IncidentSevere · 30 Oct 2026, 14:40
• M40M40 - IncidentModerate · 25 Oct 2026, 12:57
• M40M40 - Road closureSevere · 11 Oct 2026, 14:53
• M40M40 - Road closureSevere · 11 Oct 2026, 13:53
• M40M40 - IncidentSevere · 9 Oct 2026, 13:32