There's more than one stretch of motorway in the UK which was designed to be used as a runway in wartime. One such section is the A1 in Lincolnshire mear Cottesmore, it's the bit next to the disused airfield at Woolfox Lodge. The southbound carriageway is perfect straight and level for several miles, whereas the other carriageway is undulating and windy. Also, there is a service road next to it which gave access to the old hardstandings at Woolfox Lodge.