Between 1960 and 1961, two sections of (what is now known as) the M20 motorway were built between junctions 5 and 8. This was known as the Maidstone Bypass and was renumbered the A20(M) as it bypassed the stretch of the A20 through Maidstone. The A20 road was then renumbered as the A2020, which is the source of the name of the 20/20 Business Park, situated close to junction 5 of the present M20.
However, during 1971 and later in 1977, the A20(M) was extended westwards towards London and was renamed the M20 motorway, and as a result the A2020 reverted to being the A20. The 20/20 Business Park has kept its name, however.
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