Motorists still have to pass through signaled ramp junctions at I-17 until a full freeway-to-freeway interchange is built.īeginning in mid-2011, ADOT began upgrading Loop 303 between US 60 and I-10 from a two-lane highway to a six-lane freeway with auxiliary lanes and interchanges. In May 2011, this segment opened as a four-lane freeway with interchanges at Happy Valley Parkway, Lone Mountain Parkway (not opened until 2012), and Lake Pleasant Parkway. In 2009, construction began on the 14-mile segment between Happy Valley Parkway and I-17.
I39 reliever route detailed mat upgrade#
Funds from this were also used to upgrade the crossings at Waddell and Cactus Roads to make way for the new freeway. According to an agreement between the state legislature and ADOT, Statewide Transportation Acceleration Needs (STAN) funds were used to build a partial interchange at Bell Road in summer 2010, several years before previously intended. As Maricopa County had completed much of the required study and preparation work, construction on the freeway proceeded with a planned completion date of the I-10 to I-17 segment by 2015. With the extension of the sales tax approved in 2004, SR 303 was taken back over by the Arizona Department of Transportation (ADOT) and added back to the regional transportation plan. In May 2004, SR 303 was renamed the "Bob Stump Memorial Parkway" in honor of former Arizona congressman Bob Stump. An interim interchange and bridge above US 60 were also built at the same time. The segment between US 60 and Bell Road in Surprise was partially upgraded to freeway standards in 2004 with overpasses at Clearview Boulevard and Mountain View Boulevard. SR 303 was still largely a two-lane rural road and the only sections as a four-lane divided parkway was the extension north of US 60, and the southern terminus just north of I-10 between Indian School and McDowell Roads. The county then made significant improvements to the highway, extending it from US 60 to Happy Valley Parkway in 2004 as a four-lane divided parkway. Maricopa County took charge of SR 303 when it was dropped from the regional freeway plans in 1995, maintaining the interim two-lane highway along the original corridor while keeping the state route designation. However, funding shortfalls and increasing construction costs forced cutbacks in the plan, and in 1995 the freeway was dropped from the regional plans. The freeway was scheduled to be completed sometime by 2005. The interim two-lane highway was completed between US 60 and I-10 in 1991, marking the first road along the Loop 303 corridor. The freeway, designed to serve the Northwest Valley, was originally designated SR 517 in 1985 the Loop 303 designation was first assigned on December 18, 1987. Loop 303 was originally a part of the 1985 Maricopa County Regional Transportation Plan that was funded by a sales tax approved by Maricopa County voters. Old colored Arizona Loop 303 shield that has been phased out. The southern portion between US 60 to I-10 is used to bypass Grand Avenue, and the whole route is used to bypass the Phoenix Metropolitan Area History 1985–1995 East of this interchange, Loop 303 becomes Sonoran Desert Drive. The freeway comes to an end at a temporary at-grade interchange (eventually to be a freeway-to-freeway interchange) with I-17 near Skunk Creek. Following the Lake Pleasant Parkway interchange, the freeway condenses down to four lanes and passes through planned arterial interchanges. It turns east again south of Lake Pleasant at the Agua Fria River. The freeway turns eastward north of Sun City West before turning north again at the Happy Valley Parkway interchange. It passes above Grand Avenue (US 60) and a BNSF railraod line at a parclo interchange. After passing Northern Parkway, the freeway continues for a few miles before entering a residential community at Greenway Road and turning northeast. It then proceeds through a farmland terrain and passes by the Wildlife World Zoo near the Northern Parkway trumpet interchange. The freeway heads north under McDowell and Thomas Roads, then over an interchange with Indian School Road. South of Van Buren Street it continues as Cotton Lane but without a route number.
It becomes a six-lane freeway with a stack interchange at I-10. Loop 303 currently begins at Van Buren Street, one mile south of I-10 in Goodyear.
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