Today's society faces several challenges, the greatest of which is to remain globalized while also being sustainable. Thus, the search for alternatives to these challenges requires an effort never before seen or undertaken. Rapid urban expansion in Brazil has brought issues such as mobility to the forefront of discussions. Public roads remain the same, while the number of private vehicles continues to increase. Given this situation, and considering public transportation as a solution for mitigating urban mobility problems, this book presents an assessment of urban mobility in the city of Aracaju, Sergipe, in terms of service and population access to the city's public transportation system, through documentary, field, and observational research.