Next week from 15 to 21 September you can ride on Bratislava public transport for free just by showing a valid European driving licence as part of the annual European Mobility Week in Bratislava in an effort to force people out of cars and boost the use public transport, cycling and walking.
The offer does not apply to suburban lines, night buses or cross border connections, however, but covers all other public transport for the whole week.
Good idea. Buses are regular in BA and in better condition than many cars.