While the speed limit on that stretch is 65 miles per hour, the fastest 5% of drivers average speeds around 82 miles per hour over 17 miles of roadway.
Mr Passmore said he had lived on the A140 for more than 30 years and the number of serious road accidents had fallen since a 50mph limit was imposed on the Suffolk stretch of the road in 2004.
It's roughly a five-day trip across country, assuming the driver follows hours-of-service regulations that limit how long a driver can go in a given stretch.