Location : The M4 westbound between junctions J4 and J4B .
Lane Closures : Lanes 1 and 2 are closed.
Reason : Road traffic collision.
Status : Currently Active.
Time To Clear : The event is expected to clear between 19:30 and 19:45 on 29 March 2026.
Return To Normal : Normal traffic conditions are expected between 19:30 and 19:45 on 29 March 2026.
Lanes Closed : There are two of five lanes closed.
