SPAGHETTI JUNCTION, BIRMINGHAM

Spaghetti Junction, 38, covers 30 acres, serves 18 routes and includes 2.5 miles of slip roads, but only 0.6 miles of the M6 itself. It connects the M6 southbound - leading to the M1, the M6 northbound - also leeading to the M5, the A38M into Birmingham City centre and a number of other roads. It also straddles three canals, two rivers and a main railway line.

Work on the junction started in 1968 and took 4 years to complete construction of the 18 roads and 559 concrete columns, reaching up to 24.4 metres height.

Gravelly Hill Interchange, dubbed Spaghetti junction, was Britain's first free-flow interchange not involving roundabouts or traffic lights.

If you wanted to cover every road on the Junction itself, adhering to the Highway Code, you would have to drive approximately 73 miles. On a good day that might take as little as 80 minutes. On an averge West Midlands day, you are best to set aside a couple of hours at least.