Preston By-pass Preston By-pass The Preston Bypass was Britain’s first motorway. It was designed and engineered by Lancashire County Council surveyor James Drake as part of a larger initiative to create a north-south motorway network that would later form part of the M6 motorway. The bypass was opened on 5 December 1958 by the Prime Minister, Harold Macmillan. Nearly £3 million was spent in its construction. The original -mile () motorway ran around the east side of Preston between Bamber Bridge (now the M6, Junction 29) and Broughton (now the M55, Junction 1) and crosses over the River Ribble at Samlesbury at
M6 motorway (Ireland) and M4, which form the Galway-Dublin route, consist of a grade-separated 2+2 dual carriageway road with a top speed limit of 120 km/h. At approximately 144 km (90 mi), the M6 is the third longest motorway in the state. Near Kinnegad, the M6 motorway diverges from the M4 at a restricted access junction. From here it proceeds westward, passing through counties Westmeath, Offaly, Roscommon and Galway before terminating just east of Galway City near Doughiska. The present-day M6 was constructed in five stages between 2005 and late 2009. Some of the sections which now form part of the M6 were