Construction of the section of Loop 101 known as the Agua Fria Freeway first began in 1985, after Maricopa County voters approved Proposition 300, which established a 20 year half-cent sales tax to construct Valley freeways.

Today, Loop 101 (Agua Fria Freeway) is a six lane highway extending north from Interstate 10 (I-10) and west to Interstate 17 (I-17). Loop 101 is an integral part of the Valley freeway system and serves as the link between these two Interstate highways that are important routes for transportation and commerce.

In November 2004, voters in Maricopa County approved Proposition 400, which extended the existing half-cent sales tax to fund regional transportation projects through 2025. The proposition included $9 billion in funding for freeway improvements throughout Maricopa County as part of a comprehensive, 20 year Regional Transportation Plan (RTP).

Improvements to Loop 101 (Agua Fria Freeway) in the plan include widening by one general purpose lane and one HOV lane in each direction from I-10 to I-17, as well as new interchanges and landscape improvements. These projects are scheduled throughout the 20 year cycle of the plan.

Planned Improvements