We recommend against car rental for multi-country itineraries because rental agencies charge steep one way fees and most European capital cities aren't car-friendly. It's often quicker and cheaper to take the train. If you're just exploring the Czech Republic and starting and ending your trip in Prague however, a rental can be an inexpensive way to get around, once you leave the capital. In Prague a car is not needed at all. Czech expressways are modern, but rural roads can be bumpy and narrow. The Czech Republic has a zero tolerance policy for drunk driving, with steep fines for drivers with any detectable blood alcohol level.