Transborder cooperation for the development of sustainable cities and communities in the Tijuana - San Diego border region. Review of institutions

The United Nations states that more than half of the world's population lives in cities and the number is expected to increase to 60% by 2030. A metropolitan area that has experienced an accelerated population increase is the Tijuana - San Diego region. These cities are considered twin cities due to their high interaction, joint development and interdependence. This region has a population of more than five million inhabitants, therefore the use of resources and urban needs increase with it. Sustainable development is presented as the best option to face the use of resources in a balanced way without compromising the capacity of future generations. This work has the objective of analyzing the role of transborder cooperation as a fundamental tool for the institutions that are responsible for the sustainable development of cities and communities in the Tijuana - San Diego region, through the binational activity of the institutions in the creation and implementation of urban planning instruments in the region. With the use of the qualitative method of longitudinal character. A classification of urban planning instruments in the region is made from the year 2015 and if they comply with the sustainable and binational approach.