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Location : The A405 northbound between the junctions with the M1 and the M25 .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 15:00 and 15:15 on 18 April 2026.
Delay : There are currently delays of 10 minutes against expected traffic.
Location : The A405 northbound between the junctions with the M1 and the M25 .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 15:00 and 15:15 on 18 April 2026.
Delay : There are currently delays of 10 minutes against expected traffic.
⏱ Still active — no changes from National Highways. Incident ongoing for 27h 11m. Delays of 10 minutes still recorded. Monitoring continues.
Location : The A405 northbound between the junctions with the M1 and the M25 .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 15:00 and 15:15 on 18 April 2026.
Delay : There are currently delays of 10 minutes against expected traffic.
⏱ Still active — no changes from National Highways. Incident ongoing for 27h 46m. Delays of 10 minutes still recorded. Monitoring continues.
Location : The A405 northbound between the junctions with the M1 and the M25 .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 15:00 and 15:15 on 18 April 2026.
Delay : There are currently delays of 10 minutes against expected traffic.
⏱ Still active — no changes from National Highways. Incident ongoing for 28h 21m. Delays of 10 minutes still recorded. Monitoring continues.
Location : The A405 northbound between the junctions with the M1 and the M25 .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 15:00 and 15:15 on 18 April 2026.
Delay : There are currently delays of 10 minutes against expected traffic.
⏱ Still active — no changes from National Highways. Incident ongoing for 29h 1m. Delays of 10 minutes still recorded. Monitoring continues.
Location : The A405 northbound between the junctions with the M1 and the M25 .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 15:00 and 15:15 on 18 April 2026.
Delay : There are currently delays of 10 minutes against expected traffic.
⏱ Still active — no changes from National Highways. Incident ongoing for 29h 36m. Delays of 10 minutes still recorded. Monitoring continues.
Location : The A405 northbound between the junctions with the M1 and the M25 .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 15:00 and 15:15 on 18 April 2026.
Delay : There are currently delays of 10 minutes against expected traffic.
⏱ Still active — no changes from National Highways. Incident ongoing for 30h 16m. Delays of 10 minutes still recorded. Monitoring continues.
Location : The A405 northbound between the junctions with the M1 and the M25 .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 15:00 and 15:15 on 18 April 2026.
Delay : There are currently delays of 10 minutes against expected traffic.
⏱ Still active — no changes from National Highways. Incident ongoing for 30h 51m. Delays of 10 minutes still recorded. Monitoring continues.
Location : The A405 northbound between the junctions with the M1 and the M25 .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 15:00 and 15:15 on 18 April 2026.
Delay : There are currently delays of 10 minutes against expected traffic.
⏱ Still active — no changes from National Highways. Incident ongoing for 31h 26m. Delays of 10 minutes still recorded. Monitoring continues.
Location : The A405 northbound between the junctions with the M1 and the M25 .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 15:00 and 15:15 on 18 April 2026.
Delay : There are currently delays of 10 minutes against expected traffic.
⏱ Still active — no changes from National Highways. Incident ongoing for 32h 1m. Delays of 10 minutes still recorded. Monitoring continues.
Location : The A405 northbound between the junctions with the M1 and the M25 .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 15:00 and 15:15 on 18 April 2026.
Delay : There are currently delays of 10 minutes against expected traffic.
⏱ Still active — no changes from National Highways. Incident ongoing for 32h 36m. Delays of 10 minutes still recorded. Monitoring continues.
Location : The A405 northbound between the junctions with the M1 and the M25 .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 15:00 and 15:15 on 18 April 2026.
Delay : There are currently delays of 10 minutes against expected traffic.
⏱ Still active — no changes from National Highways. Incident ongoing for 33h 11m. Delays of 10 minutes still recorded. Monitoring continues.
Location : The A405 northbound between the junctions with the M1 and the M25 .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 15:00 and 15:15 on 18 April 2026.
Delay : There are currently delays of 10 minutes against expected traffic.
⏱ Still active — no changes from National Highways. Incident ongoing for 33h 46m. Delays of 10 minutes still recorded. Monitoring continues.
Location : The A405 northbound between the junctions with the M1 and the M25 .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 15:00 and 15:15 on 18 April 2026.
Delay : There are currently delays of 10 minutes against expected traffic.
⏱ Still active — no changes from National Highways. Incident ongoing for 34h 21m. Delays of 10 minutes still recorded. Monitoring continues.
Location : The A405 northbound between the junctions with the M1 and the M25 .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 15:00 and 15:15 on 18 April 2026.
Delay : There are currently delays of 10 minutes against expected traffic.
⏱ Still active — no changes from National Highways. Incident ongoing for 34h 56m. Delays of 10 minutes still recorded. Monitoring continues.
Location : The A405 northbound between the junctions with the M1 and the M25 .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 15:00 and 15:15 on 18 April 2026.
Delay : There are currently delays of 10 minutes against expected traffic.
⏱ Still active — no changes from National Highways. Incident ongoing for 35h 31m. Delays of 10 minutes still recorded. Monitoring continues.
Location : The A405 northbound between the junctions with the M1 and the M25 .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 15:00 and 15:15 on 18 April 2026.
Delay : There are currently delays of 10 minutes against expected traffic.
⏱ Still active — no changes from National Highways. Incident ongoing for 36h 6m. Delays of 10 minutes still recorded. Monitoring continues.
Location : The A405 northbound between the junctions with the M1 and the M25 .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 15:00 and 15:15 on 18 April 2026.
Delay : There are currently delays of 10 minutes against expected traffic.
⏱ Still active — no changes from National Highways. Incident ongoing for 36h 41m. Delays of 10 minutes still recorded. Monitoring continues.
Location : The A405 northbound between the junctions with the M1 and the M25 .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 15:00 and 15:15 on 18 April 2026.
Delay : There are currently delays of 10 minutes against expected traffic.
⏱ Still active — no changes from National Highways. Incident ongoing for 37h 16m. Delays of 10 minutes still recorded. Monitoring continues.
Location : The A405 northbound between the junctions with the M1 and the M25 .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 15:00 and 15:15 on 18 April 2026.
Delay : There are currently delays of 10 minutes against expected traffic.
⏱ Still active — no changes from National Highways. Incident ongoing for 37h 56m. Delays of 10 minutes still recorded. Monitoring continues.
Location : The A405 northbound between the junctions with the M1 and the M25 .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 15:00 and 15:15 on 18 April 2026.
Delay : There are currently delays of 10 minutes against expected traffic.
⏱ Still active — no changes from National Highways. Incident ongoing for 38h 36m. Delays of 10 minutes still recorded. Monitoring continues.
Location : The A405 northbound between the junctions with the M1 and the M25 .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 15:00 and 15:15 on 18 April 2026.
Delay : There are currently delays of 10 minutes against expected traffic.
⏱ Still active — no changes from National Highways. Incident ongoing for 39h 11m. Delays of 10 minutes still recorded. Monitoring continues.
Location : The A405 northbound between the junctions with the M1 and the M25 .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 15:00 and 15:15 on 18 April 2026.
Delay : There are currently delays of 10 minutes against expected traffic.
⏱ Still active — no changes from National Highways. Incident ongoing for 39h 46m. Delays of 10 minutes still recorded. Monitoring continues.
Location : The A405 northbound between the junctions with the M1 and the M25 .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 15:00 and 15:15 on 18 April 2026.
Delay : There are currently delays of 10 minutes against expected traffic.
⏱ Still active — no changes from National Highways. Incident ongoing for 40h 26m. Delays of 10 minutes still recorded. Monitoring continues.
Location : The A405 northbound between the junctions with the M1 and the M25 .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 15:00 and 15:15 on 18 April 2026.
Delay : There are currently delays of 10 minutes against expected traffic.
⏱ Still active — no changes from National Highways. Incident ongoing for 41h 1m. Delays of 10 minutes still recorded. Monitoring continues.
Location : The A405 northbound between the junctions with the M1 and the M25 .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 15:00 and 15:15 on 18 April 2026.
Delay : There are currently delays of 10 minutes against expected traffic.
⏱ Still active — no changes from National Highways. Incident ongoing for 41h 36m. Delays of 10 minutes still recorded. Monitoring continues.
Location : The A405 northbound between the junctions with the M1 and the M25 .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 15:00 and 15:15 on 18 April 2026.
Delay : There are currently delays of 10 minutes against expected traffic.
Wording as published by National Highways, recorded as it changed.
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