M55 motorway meet junction 4, where the motorway ends and becomes the A5230. The western part of the M55, and the first few hundred metres of the A5230, occupy the route of the old Blackpool Branch railway line. The first motorway constructed in Great Britain was the M6 Preston Bypass, opened in 1958. This ran from the current M6 junction 29 to the M55 junction 1. It was built as a two-lane route. In 1965 the M6 was extended north from what is the current day junction 32 to meet the Lancaster Bypass, and the M6 junction was rebuilt to its current
M6 motorway (Ireland) measure to restore access from Dublin to Galway after severe flooding at Craughwell on Friday 20 November 2009, an incomplete section of this scheme between Loughrea and Galway Clinic (Doughiska) was opened temporarily. Until 2011 there were two junction numbering schemes on the N6 route. The M6 junction numbers below are used on the entire length of the road. The Athlone bypass had a separate numbering scheme (J1–J6) but was renumbered to its current form (J8–J13) following the upgrade of the bypass in 2011. Although the M6 is a tolled motorway, there is only a single toll plaza, located at