The government rushed to prepare three major infrastructure projects: the Německý Brod – Brno railway; the Plzeň – Ostrava road; and a 4-lane highway from Prague to Velký Bočkov (on the Czechoslovak – Romanian border).

The prime minister of Carpathian Ruthenia, Avgustyn Voloshyn, requested that the Slovak border – Chust segment be added to the plan as well.

[4] The German occupation of Czechoslovakia brought only small technical changes to the project, and the construction of another segment, Chodov – Humpolec, began in May 1939.

The increasing demands of World War II slowed down the construction, and the works were completely halted in 1942.

[4] In the 1960s, traffic was growing very quickly, and a new plan for a D1 highway from Prague to the Soviet Union border was formulated.

In the late 1980s and the early 1990s the 19-km long Brno – Vyškov segment was built, along with another 20 km from Liptovský Mikuláš to Hybe in Slovakia.

As of 1 January 2023, it was announced that the section km 0.0-5.2 would be transferred to the ownership of the City of Prague and removed from the toll network.

However, the Prague TSK spokesperson Barbora Lišková reportedly continued to mystify that it was a Class I road.

[9] Furthermore, in April 2025, the widening works (to three lanes in each direction) on the 1.4 kilometres (0.87 mi) long section in Brno should conclude.

Content in this edit is translated from the existing Czech Wikipedia article at cs:Dálnice D1; see its history for attribution.