Gehl Architects has worked with many cities to improve public spaces and urban quality of life. Their work is based on research by Jan Gehl on how the built environment impacts human activity and social interaction. In Copenhagen, they conducted multi-decade public life studies to inform improvements. For New York City, they analyzed the public realm, recommended initiatives to enhance streets and promote cycling, and piloted projects that doubled bicycle lanes and attracted over 300,000 people to car-free events.