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.
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The main alignment of the M16 would have continued south-west of the junction towards Radlett and Bushey.
M16 rifle | M4 motorway | M1 motorway | M6 motorway | Hemus motorway | M25 motorway | M5 motorway | M2 Hills Motorway | M40 motorway | M54 motorway | M11 motorway | Northwestern Motorway | M90 motorway | M63 motorway | M60 motorway | M16 motorway | Logan Motorway | Cherno More motorway | Wellington Urban Motorway | North West Motorway Police Group | Motorway City | M65 motorway | M61 motorway | M606 motorway | M4 Western Motorway | M4 motorway (Ireland) | M4 motorway (Great Britain) | M48 motorway | M27 motorway | M23 motorway |
Construction began on the first section of the motorway between South Mimms and Potters Bar in 1973 and the motorway was initially designated as the M16 motorway before its opening.