The Metropolitan Planning Enhancement Act requires federal transportation agencies and state and local planning organizations to make their project selection process more transparent and accountable when deciding which transportation investments to fund. Under this bill, transportation agencies must use publicly available criteria to evaluate and rank projects based on their performance and alignment with national transportation goals, then publicly categorize the highest-performing projects. If an agency chooses to fund a lower-ranked project instead of a higher-ranked one, it must publicly explain why, such as for geographic balance or to support economically distressed areas. The bill applies to both metropolitan areas and statewide transportation planning processes and does not establish new funding amounts or implementation timelines. Overall, the legislation aims to give the public greater insight into how their tax dollars are being spent on transportation projects.