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Arizona State Route 303

Route map:
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"Loop 303" and "Arizona Loop 303" redirect here. For other uses, see List of highways numbered 303.

State Route 303 marker

State Route 303

Bob Stump Memorial Parkway
Map
Loop 303 highlighted in red
Route information
Maintained by ADOT
Length35.25 mi[1] (56.73 km)
Existed1991–present
Major junctions
From MC 85 in Goodyear (Planned)
Major intersections
To I-17 in Phoenix
Location
CountryUnited States
StateArizona
Highway system
  • Arizona State Highway System
← SR 289→ SR 347
Loop 303/I-10 interchange

Arizona State Route 303 (SR 303) or Loop 303, also known as the Bob Stump Memorial Parkway (formerly the Estrella Freeway), is a freeway that serves the west part of the Phoenix metropolitan area. The freeway, originally a two-lane rural highway, was maintained by Maricopa County until 2004 when the Arizona Department of Transportation again took control of upgrading the interim road to a freeway.[2]

Route description

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Loop 303 currently begins at Van Buren Street, one mile south of I-10 in Goodyear. It becomes a six-lane freeway with a stack interchange at I-10.[3] South of Van Buren Street it continues as Cotton Lane but without a route number. The freeway heads north under McDowell and Thomas Roads, then over an interchange with Indian School Road. It then proceeds through a farmland terrain and passes by the Wildlife World Zoo near the Northern Parkway trumpet interchange.[4] After passing Northern Parkway, the freeway continues for a few miles before entering a residential community at Greenway Road and turning northeast. It passes above Grand Avenue (US 60) and a BNSF railroad line at a parclo interchange.[5] The freeway turns eastward north of Sun City West before turning north again at the Happy Valley Parkway interchange. It turns east again south of Lake Pleasant at the Agua Fria River. Following the Lake Pleasant Parkway interchange, the freeway condenses down to four lanes and passes through planned arterial interchanges.[6] 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. East of this interchange, Loop 303 becomes Sonoran Desert Drive. 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

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1985–1995

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Old colored Arizona Loop 303 shield that has been phased out.

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.[7] 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.[8] 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 was scheduled to be completed sometime by 2005. However, funding shortfalls and increasing construction costs forced cutbacks in the plan, and in 1995 the freeway was dropped from the regional plans.[2]

1995–2004

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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. 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.[2] 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 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. An interim interchange and bridge above US 60 were also built at the same time.[9] In May 2004, SR 303 was renamed the "Bob Stump Memorial Parkway" in honor of former Arizona congressman Bob Stump.[10]

2004–2011

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With the extension of the sales tax approved in 2004,[7] SR 303 was taken back over by the Arizona Department of Transportation (ADOT) and added back to the regional transportation plan.[2] 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.[11] 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. Funds from this were also used to upgrade the crossings at Waddell and Cactus Roads to make way for the new freeway.[12]

In 2009, construction began on the 14-mile segment between Happy Valley Parkway and I-17. 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. Motorists still have to pass through signaled ramp junctions at I-17 until a full freeway-to-freeway interchange is built.[11]

2011–present

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Beginning 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 August 2011, construction began on the six-mile segment between Mountain View Boulevard and Peoria Avenue. This segment was completed in fall 2013 with interchanges at Bell, Greenway, Waddell, and Cactus Roads as well as Peoria Avenue.[13][14]

In November 2011, construction began on the north half of the I-10 and Loop 303 stack interchange. Construction was completed in August 2014 with the opening of all of the north half ramps. The McDowell Road bridge was also completed during this time.[15]

In May 2012, construction began on the seven-mile segment between Peoria Avenue and Thomas Road. This segment was fully completed in August 2014 with a trumpet interchange at Northern Parkway (opened in late 2013) along with other interchanges at every arterial road except Olive Avenue.[16][17]

In August 2014, construction began on the seven-mile segment between US 60 and Happy Valley Parkway to upgrade it to freeway standards. The first part was to upgrade the roadway to three lanes in each direction; it was complete in summer 2015. The second part was to construct a parclo interchange at the US 60. This part began in December 2014 and was complete in spring 2016. The final part was to construct the El Mirage Road interchange. This began in February 2015 and was complete in summer 2016. This marked the first time the entire Loop 303 between I-10 and I-17 was fully upgraded to freeway standards.[5]

In February 2016, construction began on the south half of the I-10 and Loop 303 stack interchange. Construction was complete in October 2017 with the opening of all of the south half ramps along with the Van Buran Street interchange.[3]

In December 2020, construction began to widen the six-mile segment between Happy Valley Parkway and Lake Pleasant Parkway from two to three lanes in each direction. It was completed with the opening of the Jomax Parkway exit in Peoria in January 2022.[18]

Interchange at 43rd Avenue

In October 2022, construction began to build the interchanges at 51st Avenue and 43rd Avenue. Construction was completed with the opening of these interchanges in August 2023.[6]

Future

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A new segment of Loop 303 is planned to begin construction in 2025. It is the three-mile segment south of Van Buren Street to MC-85. The two-mile stretch of this segment between Van Buren Street and Elwood Street will be built along the Cotton Lane alignment. It will consist of building three lanes in each direction along with interchanges at Yuma Road and Elwood Street. There will be frontage roads along this entire segment to provide access to local communities. Bridges will be built over Lilac Street/Canyon Trails Boulevard and Lower Buckeye Road, and access will be via the frontage roads. Following Elwood Street, Loop 303 will head southwest for the one-mile stretch of this segment between Elwood Street and MC-85. It will consist of building two lanes in each direction as well as an at-grade intersection with MC-85.[19]

A full freeway-to-freeway interchange will be built at the Loop 303 and I-17. The goal is for construction to begin sometime in 2028. Loop 303 has been built to accommodate four-general purpose lanes, one HOV lane, and one auxiliary lane in order to expand in the future.[20]

Loop 303 is planned to continue south of MC-85 and connect to the future SR 30 in Goodyear. Construction of that segment will be around the same time as that portion of SR 30, and the timeline is currently unknown.[21]

Long-term plans include the Loop 303 to continue south of SR 30 to the future I-11 Hassayampa Freeway. Most of this extension would be in Goodyear and would be built around the same time as that portion of I-11.[22]

Exit list

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Exit numbering is arbitrary. The entire route is in Maricopa County.

Locationmi
[1]		kmExitDestinationsNotes
Goodyear0.000.0099 MC 85 (Historic US 80)Planned at-grade intersection; construction planned to begin in 2025; Loop 303 may go south of MC-85 in the future[19]
1.101.77100Elwood Street / Cotton LanePlanned interchange; to be southbound exit and northbound entrance; construction planned to begin in 2025[19]
2.103.38102Yuma Road / Lower Buckeye RoadPlanned interchange; no northbound signage for Lower Buckeye Road; construction planned to begin in 2025[19]
3.205.15103Van Buren Street / McDowell RoadNorthbound exit and southbound entrance; temporary counterclockwise terminus
3.80–
3.97		6.12–
6.39		104 I-10 – Phoenix, Los AngelesStack interchange; signed as exits 104A (east) and 104B (west); exit 124 on I-10
5.198.35105Thomas Road / McDowell RoadSouthbound exit and northbound entrance
6.179.93106Indian School Road
Goodyear–Glendale line7.1911.57107Camelback Road
Glendale8.1913.18108Bethany Home Road
9.2014.81109Glendale Avenue
10.1816.38110ANorthern AvenueNorthbound exit and southbound entrance
10.6817.19110BNorthern Parkway eastTrumpet interchange; west end of Northern Parkway
11.1617.96111Olive AvenuePlanned interchange; to be southbound exit and northbound entrance[23]
Glendale–Surprise line12.1819.60112Peoria Avenue
Surprise13.1821.21113Cactus Road
14.1822.82114Waddell Road
15.1824.43115Greenway Road
16.1826.04116Bell Road
19.2931.04119 US 60 (Grand Avenue)Parclo interchange
Sun City West22.5036.21122Litchfield RoadProposed interchange[24]
23.6838.11123El Mirage Road
​25.6841.33125Happy Valley Parkway / Vistancia BoulevardHappy Valley Parkway was routing of Temporary Loop 303 before parkway's maintenance was turned over to Maricopa County
Peoria26.8843.26126Jomax Parkway
27.9845.03127Lone Mountain Parkway
31.7851.14131Lake Pleasant Parkway
Phoenix34.5855.6513367th AvenuePlanned interchange[6]
36.7859.1913651st Avenue
37.6860.6413743rd Avenue
39.2563.17138 I-17 / Sonoran Desert Drive – Flagstaff, PhoenixClockwise terminus; at-grade intersection with frontage roads; I-17 exit 221; continues east as Sonoran Desert Drive
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also

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References

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  1. ^ a b Roadway Inventory Management Section, Multimodal Planning Division (December 31, 2013). "2013 State Highway System Log" (PDF). Arizona Department of Transportation. Retrieved January 16, 2016.
  2. ^ a b c d "Loop 303". AAroads. June 6, 2020. Retrieved January 30, 2022.
  3. ^ a b "ADOT opens all new ramp connections at I-10/Loop 303 interchange in Goodyear". Arizona Department of Transportation. October 10, 2017. Retrieved February 5, 2022.
  4. ^ "Northern Parkway". AAroads. June 6, 2020. Retrieved January 23, 2022.
  5. ^ a b "New Loop 303 lanes open in northwest Valley". Arizona Department of Transportation. June 24, 2016. Retrieved February 5, 2022.
  6. ^ a b c "Loop 303: Lake Pleasant Parkway to I-17 Improvements". Arizona Department of Transportation. Retrieved November 30, 2022.
  7. ^ a b "About MAG: Proposition 300 and 400". Maricopa Association of Governments. Retrieved January 30, 2022.
  8. ^ Breyer, Joe. "Right-of-Way Resolutions - Route Number: 517". Arizona Highway Data. Works Consulting LLC. Retrieved March 2, 2016.
  9. ^ "West Valley's explosive growth spawns Loop 303 construction". Biz Journals. October 5, 2003. Retrieved January 30, 2022.
  10. ^ "Maricopa County Board of Supervisors minute book" (PDF). May 13, 2004. Archived from the original (PDF) on 30 September 2007. Retrieved September 30, 2007.
  11. ^ a b "The future of Loop 303". Arizona Department of Transportation. May 5, 2011. Retrieved February 5, 2022.
  12. ^ "FY 2009 and FY 2010 Appropriations Chairmen Budget Options" (PDF). Arizona Legislature. p. 6. Retrieved February 1, 2022.
  13. ^ "'Turnin' dirt' on the Loop 303 in Surprise". Arizona Department of Transportation. August 11, 2011. Retrieved February 1, 2022.
  14. ^ "Work continues on Loop 303". Arizona Department of Transportation. December 16, 2013. Retrieved February 1, 2022.
  15. ^ "All ramps are open at the Loop 303/I-10 traffic interchange". Arizona Department of Transportation. September 4, 2014. Retrieved February 5, 2022.
  16. ^ "Two new Loop 303 expansion projects to start soon in the West Valley". Arizona Department of Transportation. May 3, 2012. Retrieved February 4, 2022.
  17. ^ "ADOT opens two ramps connecting Loop 303, Interstate 10". Arizona Department of Transportation. August 17, 2014. Retrieved February 4, 2022.
  18. ^ "Loop 303 widening project completed in northwest Valley". Arizona Department of Transportation. January 20, 2021. Retrieved January 21, 2022.
  19. ^ a b c d "Loop 303: MC 85 to Van Buren Street Improvements". Arizona Department of Transportation. Retrieved July 29, 2022.
  20. ^ "Initial Design Concept Report SR 303L Lake Pleasant Parkway to I-17" (PDF). Arizona Department of Transportation. October 2021. pp. 77–78. Retrieved April 1, 2022.
  21. ^ "Loop 303 from Interstate 10 to Proposed State Route 30". Arizona Department of Transportation. Retrieved July 29, 2022.
  22. ^ "Loop 303: State Route 30 to Hassayampa Freeway Study". Arizona Department of Transportation. Retrieved February 5, 2022.
  23. ^ "FY 2022 FREEWAY LIFE CYCLE PROGRAM (FLCP)" (PDF). Maricopa Association of Governments. December 1, 2021. p. 39. Retrieved July 29, 2022.
  24. ^ "SR 303L, LITCHFIELD ROAD TRAFFIC INTERCHANGE FINAL PROJECT ASSESSMENT" (PDF). Maricopa Association of Governments. April 2019. Retrieved February 5, 2022.
[edit]
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