A-road fork sign
A green sign with a diagram showing an exit branching off the road ahead and the following text.
Forward destinations: London; Stevenage; Junction 10 A1(M) [Motorway symbol] .
Exit destinations: Baldock; Stotfold; A507; Services.
...we're about to join the final length of A1(M), the motorway that will take us to the gates of Greater London.