Location : The M40 southbound entry slip at junction J4 . Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to clear between 10:45 and 11:00 on 10 July 2021. Return To Normal : Normal traffic conditions are expected between 10:45 and 11:00 on 10 July 2021. Lanes Closed : All lanes are closed.