Location : The A1 northbound exit slip to the A639 . Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to clear between 15:15 and 15:30 on 20 June 2021. Return To Normal : Normal traffic conditions are expected between 15:15 and 15:30 on 20 June 2021. Lanes Closed : All lanes are closed.