Motorway fork sign
A blue sign with a diagram showing a branch off the road ahead and the following text.
Forward destinations: Preston; Kendal.
Exit destinations: Penrith; Keswick; Brough; A66 [Hollow diamond diversion symbol].
Junction number: 40.
The A66 crosses the Pennines to the A1, if your aim is to head down the east side of England instead of the west. It's the only coast-to-coast route 66 in the world.