One of the best ways to move around Vienna Austria is by tramway. Vienna has an extensive tram and bus network. In the most populated areas of Vienna, public transport runs so frequently (even during off-peak hours) that any familiarity with departure timetables is virtually unnecessary. The convenience and flexibility of the public transport is in turn reflected by its popularity; 53% of Viennese workers travel to their workplace by public transport. During night hours, public transport is continued by the Nightline buses operating on all the main routes, generally every half hour. Fare prices within the city are independent of the length of the journey and covers all modes of public transport. Tickets are also available for various time periods, such as 24 hour, monthly or yearly tickets.