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The execution of urban road works in the city of Puno and other Peruvian municipalities faces critical problems in their budget execution, according to reports from the Comptroller General of the Republic. The Provincial Municipality of Puno has experienced a high number of paralyzed works and variations in investment budgets, which highlights the importance of identifying the causes of failure in budget management. In this study, two representative projects to improve urban road service and walkability in the José Antonio Encinas neighborhood and in the town center of Alto Puno were analyzed. A qualitative-quantitative approach was used, including interviews with relevant public officials, documentary analysis, and ex-ante and ex-post evaluations. The mixed methodology was effective and complete in determining the impact of the projects by comparing the Logical Framework matrices, which revealed significant causes of failure in terms of scope, cost and time. The conclusions reveal the excessive delay in the execution of works by direct administration as the main problem, with a less significant impact on contracted works. The final relationship between scope, cost and time management was 93% and 105%, respectively. In addition, recommendations were proposed based on the methodologies of the Project Management Institute and the International Organization for Standardization to improve project management and reverse the adverse indicators found, thus seeking to optimize the execution of urban road works in the city of Puno.