Vienna’s public transport system, covering buses, trams, and metro lines, plays a critical role in its ranking as the world’s most livable city. With affordable annual passes and future expansions like the U5 metro line, the city is focused on sustainability, CO2 reduction, and ensuring accessibility, aiming for climate neutrality by 2040.

Source:  https://www.euronews.com/next/2024/10/20/we-drive-five-times-around-the-world-everyday-what-to-know-about-viennas-public-transport