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In November 2004, Maricopa County voters approved a 20-year extension of a half-cent sales tax until December 31, 2025, to fund a comprehensive package of transportation improvements as part of the Regional Transportation Plan. Funding for the plan, which includes $9 billion in regional freeway improvements in Maricopa County, became effective January 1, 2006.
Freeway planning to determine potential future corridors and freeway improvements is conducted well in advance of design and construction. Area population growth, future land use, jurisdictional responsibilities and other factors are used to determine the need, feasibility and general location of future freeway improvements.
The study stage establishes the location (alignment) and basic characteristics (number of lanes, type of traffic interchange, etc.) of a roadway. Accompanying this are environmental studies (noise, economic impacts, etc.), identification and evaluation of alternatives, general cost estimates, coordination with public and private partners and the determination of feasibility to move to the design phase.
The design of a roadway involves several stages of detailed engineering and technical review and interim levels of approval. Project information is shared and discussed with the public at project milestones, and public input is considered in the evaluation of alternatives. The final design of the roadway is represented in plans and specifications that construction contractors use to prepare construction bids.
Road construction for projects is based on detailed plans and specifications provided to the contractor following the approved design. As the construction process advances, changes may occur that are influenced by a variety of factors. ADOT continually looks for ways to improve the construction process for maximum efficiency and minimal community impact. Once built, a roadway will be maintained and improved over time as a result of future growth and transportation needs.
ADOT continually plans for enhancements to the roadway once it is built and in use for maximum efficiency and safety. Various studies identify these enhancements and may influence additional planning, design and construction. Studies for Loop 101 (Price Freeway) are on the Current Studies page.
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Our
Valley Freeway System is part of the 2004 voter-approved
Regional Transportation Plan. We are working hard with
our transit partners to implement the voters’
vision and are committed to quality, safety, open communication
with our neighbors, and minimal inconvenience to the
traveling public. |
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