A green sign with a diagram showing a roundabout with exits ahead and right, and the following text.
Forward destinations: The NORTH; Peterborough A1 .
Right turn destinations: Biggleswade; A6001.
The Biggleswade Bypass was built in the 1950s, when there was a much more austere vision of what the A1 might look like. It's got a roundabout at each end, still here today.