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 of Agriculture, Food and Environment, the Ministry of Public Works , the Ministry of Industry - through the Institute for Energy Diversification and Savings (IDAE )- and the Ministry of Internal Affairs - through the DGT - 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.