An elderly man caused four miles of traffic jams as he drove his mobility scooter at 8mph along the A12 in Essex.
Essex Police were called to the southbound carriageway, which has no hard shoulder, near Chelmsford, on Thursday, after calls from drivers.
Police escorted the man from Chelmsford off the A12.
Police issued him with a Section 59 warning which is normally restricted to using a vehicle in an anti-social manner.
An Essex Police spokesman said: "Police received numerous calls from drivers concerned for the welfare of the scooter rider."
He said officers formed "a rolling roadblock around the scooter to hold back traffic until the man could be escorted off at the Danbury turn-off".
Sgt Jason Dearsley said: "Instead of tying up the court's precious time we decided that the best way to deal with this matter was to use powers given to us normally for dealing with boy racers.
"We see it as an Anti-Social Behaviour Order (Asbo) for road users."