The Metropolitan Mobility Observatory  (MMO) is an initiative of analysis and reflection, comprised of the Public Transport Authorities (PTA), of the main Spanish metropolitan areas, the Ministry for the Environment and Rural and Marine Affairs and the Ministry of Public Works in order to reflect the contribution of public transport to improve the quality of life and sustainable development in cities.

The MMO publishes an annual report analyzing the mobility of participating metropolitan areas.

Another important activity is the MMO Technical Conferences, which presents the annual reports.