The main purpose of this legislation, known as the Fair Allocation and Improvement of Regional Fleets Act or the FAIR Fleets Act, is to improve how the United States Postal Service distributes its fleet of vehicles. The goal is to ensure that all areas, especially those that are underserved, have better access to postal services. This includes modernizing the vehicle fleet to include more fuel-efficient and environmentally friendly options. Key provisions of the Act include a requirement for the Postal Service to regularly assess how its vehicles are distributed across the country.