Black Cat Roundabout is on the junction between the A1 and A421 (formerly A428) Bedford road just south of St Neots. It was reconstructed in 2005-6 as part of the Great Barford bypass works to allow access to the new dual carriageway bypass. It takes its name from the garage and car repair workshop which opened in the 1920s at the junction called the Black Cat Garage. In later years the garage was converted to a nightclub and then a restaurant, before becoming derelict for many years. In the 1980s, the current large covered petrol station was opened on the site.