The Czech Republic has numerous highways surrounding Prague. These are usually two lane roads leading to major regions. However, there are many narrow side roads. Numerous railway crossings located on roads other than highways are distinctive for the Czech Republic. Pay attention to a road connecting Prague and Wroclaw with a bottle neck in a form of narrowing and alternating traffic with traffic lights - you may waste a lot of time there.
The game does not offer too many roads in Slovakia. Actually you can visit only Bratislava located near the Austrian border (one highway). Bratislava and its neighborhood is full of speed cameras; 50km/h is the speed limit.