Australian state and territory governments are making significant progress towards decarbonising their bus networks by setting zero-emissions targets. In New South Wales, the largest zero-emissions bus fleet operates in Greater Sydney and Newcastle. The state aims to transition 8,300 buses by 2050, with a staged approach focusing on infrastructure upgrades and steady transition rates. Challenges include power upgrades for depots and ensuring effective integration of new buses. Queensland is targeting 50% renewable energy for its bus network by 2030, with an order of 200 zero-emissions buses. Victoria mandates that all new public transport buses from 2025 must be zero-emissions, showing a strong commitment to sustainability.