Location : The M1 northbound entry slip at junction J21 . Reason : Accident involving a vehicle crossing the central reservation. Status : Currently Active. Time To Clear : The event is expected to clear between 17:30 and 17:45 on 24 July 2021. Return To Normal : Normal traffic conditions are expected between 17:30 and 17:45 on 24 July 2021. Lanes Closed : All lanes are closed.