Expressways connect Berlin with Dresden (A-13) and Leipzig (A-9). Both journeys take about two hours. The A-4 stretches east–west across the southern portion of Thuringia and Saxony.
A road-construction program in eastern Germany is ongoing, and you should expect traffic delays on any journey of more than 300 km (186 miles). The Bundesstrassen throughout eastern Germany are narrow, tree-lined country roads, often jammed with traffic. Roads in the western part of the Harz Mountains are better and wider.
Cars can be rented at the Dresden and Leipzig airports, at train stations, and through all major hotels. Be aware that you are not allowed to take rentals into Poland or the Czech Republic.