M4 westbound between J4 and J4B | Westbound | Congestion

Location : The M4 westbound between junctions J4 and J4B .
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 02:15 and 02:30 on 10 February 2026.
Delay : There are currently delays of 10 minutes against expected traffic.