Which motorway runs through Birmingham's original Spaghetti Junction?

Birmingham’s original Spaghetti Junction is the Gravelly Hill Interchange on the M6 motorway.

The interchange is officially Junction 6 of the M6, where the motorway meets the A38(M) Aston Expressway near Gravelly Hill. It also connects with the A38, the A5127 and several local roads, making the site much more than a simple motorway crossing. The M6 is therefore the motorway most directly identified with Birmingham’s original Spaghetti Junction.

Construction formed part of the expansion of the M6 through the Birmingham area. The interchange was designed around a difficult landscape containing railway lines, canals, rivers and existing roads. That dense arrangement required elevated carriageways and a large network of slip roads, producing the tangled appearance that led to the nickname.

The M6 is often confused with nearby routes such as the M5, M40 or M42. Those motorways serve Birmingham and the wider Midlands, but none is the motorway designated as Junction 6 at Gravelly Hill. The distinctive junction is specifically associated with the M6 and A38(M).