Valley residents have seen 410 new corridor miles of freeways, 252 miles of street projects, and millions of additional miles of bus service since the implementation of Proposition 400, according to new report by the Maricopa Association of Governments (MAG). The 2022 Annual Report on the Status of the Implementation of Proposition 400 details transportation progress made under Proposition 400, the half-cent sales tax for transportation passed by Maricopa County voters in 2004. The revenue generated by the tax accounts for more than half of the region’s funding to implement projects included in the Regional Transportation Plan . MAG Chair and Avondale Mayor Ken Weise says the current Prop 400 progress must be built upon if the region is to remain an ideal place to live, work and play. The projects completed under Proposition 400 are improving the lives of our residents every day, including better access to work, school, grocery stores, medical appointments and recreation. Kenneth Weise Avondale Mayor Mayor Weise continues, “Maricopa County is one of the fastest growing areas of the country – both in terms of population and jobs. We need to build on the successes of Proposition 400 to ensure the Valley remains attractive to new residents, tourists and business interests looking to relocate to Arizona.” In 2004, Maricopa County voters approved the extension of a half-cent sales tax for transportation, originally passed in 1985. (A map of projects completed during fiscal year 2022 is included below.) Proposition 400 funding will expire in December 2025. In June 2021, the MAG Regional Council unanimously approved a new Regional Strategic Transportation Infrastructure Investment Plan . The plan, which involved significant public and stakeholder input, is multimodal and includes a suite of investments such as freeway improvements and high-capacity transit expansion. Significant investments also have been identified for important programs such as safety, bus transit, and active transportation (walking and bicycling infrastructure). The Plan also provides greater flexibility to ensure the region can best respond to critical needs now and into the future. Funding for the Plan would need to come through an extension of the half-cent sales tax. Legislative approval is needed to put an extension of Proposition 400 before Valley voters. Notable Proposition 400 projects that were completed last year include the Loop 303 (Estrella Freeway), Happy Valley Road to Lake Pleasant Parkway freeway widening in the West Valley, reconstruction of the I-17 (Maricopa) at Central Avenue bridge in Phoenix, and Tempe Streetcar in the East Valley. A map detailing all Proposition 400 projects in Fiscal Year 2022 is provided below. The 2022 Annual Report on the Status of the Implementation of Proposition 400 is a statutory requirement under Arizona Revised Statutes (ARS) 28-6354 and is produced by MAG in consultation with its implementing partners, including the Arizona Department of Transportation, Valley Metro, and MAG member agencies. Here is the map showing projects completed in FY 2022 as outlined in the annual report: Learn more about our Regional Transportation Plan .