Immigration minister Robert Jenrick has been disqualified from driving for six months and fined £1,639 for speeding on the M1.
The offence happened on 5 August last year, the Courts and Tribunal Service said.
The MP for Newark, Nottinghamshire, previously admitted to travelling at 68mph in a temporary 40mph zone between junctions 18 and 17 on the southbound M1.
The case was dealt with through a Single Justice Procedure at Northampton Magistrates Court, which allows a magistrate to rule on criminal cases seen as minor in a closed court, meaning the public and press cannot attend.
They also allow defendants to plead guilty or not guilty in writing which meant that Mr Jenrick did not have to attend court in person.