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

Asia
Tehran, Iran

Europe
Antwerp, Belgium
Amsterdam, The Netherlands
Arnhem & Nijmegen, The Netherlands
Barcelona, Spain
Basel, Switzerland
Budapest, Hungary
Copenhagen, Denmark
Cork, Ireland
Eindhoven, The Netherlands
Enschede, The Netherlands
Hannover, Germany
Lisbon, Portugal
Lyon, France
Maastricht, The Netherlands
Malmö, Denmark
Manchester, UK
Munich, Germany
Rotterdam, The Netherlands
South Limburg, The Netherlands
Stockholm, Sweden
Utrecht, The Netherlands
The Hague, The Netherlands

North-America
Mexico City, Mexico
Minneapolis, United States