Location : The M1 southbound between junctions J41 and J40 . Lane Closures : Lanes 1, 3 and 4 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to clear between 08:15 and 08:30 on 15 September 2021. Return To Normal : Normal traffic conditions are expected between 08:15 and 08:30 on 15 September 2021. Lanes Closed : There are three of four lanes closed.