Th A1081 has never been a cause of problems on this junction so shutting it off is a pointless suggestion! Also making the A1 south of here motorway would solve nothing. I use this daily and have done so for 10 years now. This junction regularly got grid-locked as selfish idiots ignored the lights and joined the back of queues, blocking entries and exits. Since the widening and remarking of lanes a couple of years though, this has problem has all but disappeared. Camera's to stop people jumping the lights would be good, especially on the set prior to joining the A1 northbound as many twats regularly have a long run up to them and jump them at red, endangering traffic exiting the M25 clockwise.