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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
State Route 87 (Duthie-Martin Highway) are on the Current
Studies page.
State
Route 87
(Duthie-Martin Highway) |
New Four Peaks Road to Dos S Ranch Road Reconstruction
and Erosion Control Project.
Once the design is completed, it is anticipated that
construction of the erosion control portion of the project
will occur between March 1, 2010 and September 28, 2010.
The reconstruction and widening portion of the project
is anticipated to occur between September 7, 2010 and
June 10, 2011. |
SR 87 (Duthie-Martin Highway) improvements are funded with
the half cent sales tax under the voter-approved Proposition
400.
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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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