The A601(M) is a motorway in Lancashire, England. It is 1.3 miles (2.1 km) long, and meets the M6 at Junction 35. It is a unique motorway within the United Kingdom as it has a dual carriageway section leading north from Junction 35 of the M6, with a single carriageway section (the only single carriageway section with motorway status in the United Kingdom) leading south, where it terminates at a roundabout on a B road. The A601(M) is not the A601 under motorway restrictions, as is the usual explanation for such a classification in the UK.