A green sign with a diagram showing an exit branching off the road ahead and the following text.
Forward destinations: The NORTH; Peterborough A1 .
Exit destinations: (M1); Milton Keynes; Cambridge; A421; Great; Barford ; Roxton.
Junction name: BLACK CAT.
For decades this was a notorious roundabout, named for the garage on the corner and its distinctive mascot. It's now a three-level roundabout junction where the A421 goes flying over the top, relieving the next bit of A1 from having to carry east-west traffic between Bedford and Cambridge.