It is planned as a reliever for Interstate 10 five miles to the south and will run through the communities of Buckeye, Goodyear, Avondale, and Phoenix.

SR 30 will then head back northeast for seven miles before intersecting Loop 202 just south of Broadway Road in Phoenix.

SR 30 will then continue to travel northeast for four and a half miles before meeting its eastern terminus by intersecting the Interstate 17 at the Durango Curve in Phoenix.

[3] In November 2004, Maricopa County voters approved an extension to an existing sales tax funding regional transportation improvements.

However, rapid growth in the neighboring communities of Buckeye, Goodyear, and Avondale is expected to worsen the congestion on I-10, necessitating the construction of a reliever route.

In response to a budget shortfall brought on by the Great Recession, the Maricopa Association of Governments (MAG) voted to suspend funding to numerous projects in October 2009, including SR 30.

In October 2016, it was announced that ADOT was exploring the possibility of building SR 30 as a toll road to accelerate its construction.

[6] On October 26, 2017, local mayors officially named SR 30 the Tres Rios Freeway after the nearby Gila, Agua Fria, and Salt rivers.