Urban divides are elements that influence how urban fabric grow and develop. They separate -physically or figuratively- space, movement and connections. It is the juxtaposition between Types, which is the context where the device can be found and Devices, which are the objects which divide. When an urban divide ceases to operate, it changes, disappears, or stay as ruins, leading to urban emptiness (a multilayer phenomenon in the city system). This Major Project aims to explore different urban relationships related to urban divide typologies and devices, urban emptiness typologies and how urban regeneration projects using urban divides work as strategy axes to improve cities, allowing the design of macro-strategic projects. Therefore, this proposal focuses on analysing rail tracks as elements for urban regeneration. Projects using urban divides and urban emptiness across Mexico and the United States of America are analysed to understand the effects on the urban fabric and how this practice provides tools to generate relationships between society, government and private sectors. The chosen site for the project uses two historical railways in Celaya, Mexico. These will cease to operate in 2020 when a new railway system outside of the city is completed. These rail tracks divide Celaya´s urban sprawl into four quadrants and have a complex relationship with their urban environments, as they cross diverse urban typologies, gated communities, informal settlements, historical sites, factories and industrial archaeology. To create an Urban Regeneration Strategies applying urban divides, a detailed analysis of smaller urban divides devices within the urban fabric is important to understand the complexity of urban relationships, as these will disclosure strengths, weaknesses, opportunities and threats for improving the distribution of urban equipment, social equality, new green infrastructure, legibility, opportunities and accessibility. This approach is an opportunity to encounter common identities in order to improve the development of urban growth and the life of their inhabitants using urban divides that will cease to operate.