Within the
agglomeration of Brno plans for a new route intend to relocate the D52 running from the
Rajhrad junction bypassing the city centre to reach the
Highway D1 and the
Expressway R43 at
Troubsko. Parts of the motorway were built on sections of the former
Strecke 88 Autobahn constructed between 1939 and 1942 during the
German occupation of Czechoslovakia as part of a connection between
Breslau (Wrocław) and Vienna, colloquially called
Hitlerova dálnice ("Hitler's motorway"). Prior to year 2016, this highway was categorised as Expressway R52 (). A section between
Pohořelice and
Mikulov is planned for 2028, providing a continuous connection between
Brno and the Austrian A5 (
North Autobahn) at
Drasenhofen, leading to
Vienna.
Dispute There is a long-standing dispute over the continuation of the motorway. While the Directorate of Roads and Motorways has persistently advocated using the I/52 road directly for the construction of the motorway to the maximum extent, which in the section from
Pohořelice to
Mikulov runs outside the villages and in a footprint more or less compliant with the motorway parameters, opponents have proposed using the D2 motorway from Brno to Breclav for the Brno-Vienna transit and from there to build a link to the state border. This route via Breclav was advocated by some municipalities below Pálava and environmentalist groups, as they feared environmental damage in the area of the Novomlýnské nádraží reservoirs and the Pálava protected landscape area, along whose western border the I/52 road runs. These disputes have also delayed the decision to build the Břeclav bypass on the I/55 road. On 23 January 2009, an agreement was signed in Vienna between the Czech Republic and Austria on the connection of the R52 expressway with the Austrian A5 motorway on the Brno-Vienna route in the Mikulov-Drasenhofen section (in the area of the former border crossing). The construction of the R52 was supposed to start in 2010, but on the petition of the municipalities of Bavory and Dolní Dunajovice and several individuals, the Supreme Administrative Court annulled the zoning plan of the Břeclav region in November 2009, including the disputed R52 route between Pohořelice and Vienna. The European Commission also criticised the procedure of the Czech authorities in approving the zoning plan of the Břeclav region and refused to co-finance the construction until the situation was clarified. ==Route description==