Location : The M4 westbound between junctions J21 and J22 . Lane Closures : The hard shoulder and lane 1 are closed. Reason : Medical emergency. Status : Currently Active. Time To Clear : The event is expected to clear between 02:30 and 02:45 on 30 June 2021. Return To Normal : Normal traffic conditions are expected between 02:30 and 02:45 on 30 June 2021. Lanes Closed : There is one of two lanes closed.