The D1 motorway (Czech: Dálnice D1) is the main motorway of the Czech Republic. Currently it connects the two biggest Czech cities, Prague and Brno; in the future it will be extended to Ostrava and to the Czech–Polish border in Věřňovice (Karviná District) / Gorzyczki (Wodzisław County). It is 366 km (227.4 mi) long, but the planned length is 376.5 km (233.9 mi). It is the busiest motorway in the Czech Republic, with a maximum AADT of 99,000 vehicles per day near Prague. From Wikipedia
