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Map showing construction dates of sections of the M1 M1 at junction 4. The old overhead lane control gantries are still visible, which were replaced with newer, verge-mounted MS4 variable message signs in 2008. The M1 was extended south towards London from its original starting point at junction 5, in three stages.
The M1 is straight and flat on the 6-mile (9.7 km) stretch between Junctions 9 and 10 and on the 4-mile (6.4 km) stretch between Junctions 12 and 13, and an urban myth exists claiming that these were to be used as supplementary runways by the United States Air Force in the event of a major conflict with the Soviet Union. [5]
A 120 km/h (75 mph) speed limit applies on most of the M1, the exception being a 100 km/h (62 mph) limit between Junction 1 and Junction 2 at Dublin Airport. The lower speed limit is credited to the much higher volumes of traffic on this stretch. Fingal County Council raised the limit on this section to 100 km/h (62 mph) in June 2022.
A number of other types of junction are also used on the motorway network. The M4/M6 and M7/M9 junctions use a variant of the fork style interchange. The M9/N10 junction in County Kilkenny and N40/N28 junction in County Cork are trumpet-style interchange while the M50/N7 and M50/N4 interchanges use partial cloverleaf junctions.
The Catthorpe Interchange is a major intersection at the southern end of the M6, the western end of the A14 and junction 19 of the M1 near the village of Catthorpe in Leicestershire, England. It was developed in 1994 when the link to the A14 was added to the pre-existing M1/M6 junction by joining the M1, M6 and A14 to the country lane between ...
Early designs for the M1 show the extension to Sheffield and Leeds at what is now the Aston Interchange (A57). The draft scheme for the 87 miles from Crick to Doncaster was first published on 8 January 1960, where the extension to Leeds was now north of the Aston Interchange; all the junctions shown are those that would be built.
The Ordnance Survey 1:25000 map showed the A-road section as part of the A14 and the motorway section (between the B1043 junction and the A1(M)) as the A14(M). However, some official documents, including the 1993 statutory instrument which authorised the motorway upgrade, referred to it as the A604(M). [ 78 ]
This section opened in stages, first from the M62 to junction 1 in 1971 (this was originally numbered M65), and then next from junction 1 to junction 3 in 1973. [ 1 ] When the M1 was diverted away from Leeds when the 'M1 – A1 Lofthouse to Bramham' extension opened in 1999 [ 2 ] adjustments were made to junction 3 and the Leeds section of the ...