Smart Motorway gantry sign
A gantry structure spanning the motorway with electronic signals, blue signs showing a "tiger tail lane drop" where the left lane exits, the right hand two lanes continue ahead and the second lane from the left can go in either direction, and the following text.
Exit destinations: A41 Aylesbury; Hemel Hempstead .
Forward destinations: (M1, M11) The NORTH; Luton [Airport symbol] Stansted [Airport symbol] M25 .
Junction number: 20.
The A41 is an expressway from here to Aston Clinton, just short of Aylesbury, though if you're really tenacious you could stay with it all the way to Birkenhead. There are faster ways to Merseyside, though.