Cycling cities has covered 50 cities in 25 countries and is still growing. See below for a list of researched cities finished or in progress:

Africa
Aba, Nigeria
Bamako, Mali
Cairo, Egypt
Chipata, Zambia
Cape Town, South Africa
Dar es Salam, Tanzania
Douala, Cameroon
Johannesburg, South Africa
Kampala, Uganda
Kano, Nigeria
Kisumu, Kenya
Maputo, Mozambique
Mzuzu, Malawi
Nairobi, Kenya
Tamale, Ghana
Zomba, Malawi

Asia
Tehran, Iran

Europe
Arnhem & Nijmegen, The Netherlands
Barcelona, Spain
Budapest, Hungary
Cork, Ireland
Lisbon, Portugal
Maastricht, The Netherlands
Munich, Germany
Rotterdam, The Netherlands
The Hague, The Netherlands

North-America
Mexico City, Mexico
Minneapolis, United States