The M16 motorway was the designation planned in the late 1960s and early 1970s for use on Ringway 3, a new motorway planned as part of the London Ringways Plan to run a circular route around London.
Construction of the first section of the M16 began in 1973 between South Mimms and Potters Bar in Hertfordshire and opened in September 1975 with the temporary general purpose road designation A1178. During construction of the first section of the motorway, the majority of the Ringways plan was cancelled and, in 1975 the plans for Ringway 3 were modified to combine it with parts of another motorway, Ringway 4, the outermost Ringway.
Source: Wikipedia.org
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Address: Hertsmere, United Kingdom
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