Location : The A1 northbound entry slip from the A607 . Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to clear between 12:45 and 13:00 on 25 September 2021. Return To Normal : Normal traffic conditions are expected between 12:45 and 13:00 on 25 September 2021. Lanes Closed : All lanes are closed.