Copenhagen has developed one of the most sustainable transportation systems in the world through its focus on green transportation options. The city has a well-used public transportation network including the Metro and S-Train systems. It has also prioritized cycling and pedestrian infrastructure, with over 30% of trips made by bike. Additionally, Copenhagen has invested in green spaces and has a carbon neutrality plan to be fully implemented by 2025. Through gradual transformations under the guidance of urban planner Jan Gehl and supportive policies, Copenhagen has successfully shifted toward more sustainable transportation modes.