Its route was: Bratislava (D2) - Trnava (R1), before 1999 D65) - Piešťany - Trenčín (junction with old D1).
Most of the D61 part of new D1 highway is still marked with old kilometres (except in some parts of Bratislava).
The motorway was first mentioned in plans in 1963 and its construction started in 1972 by constructing Bratislava - Senec section.
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