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State Route 101 (SR 101) or Loop 101 is a semi-beltway looping around the
Phoenix Metropolitan Area The Phoenix metropolitan area, also known as the Valley of the Sun, the Salt River Valley, metro Phoenix, or The Valley, is the largest metropolitan statistical area in the Southwestern United States, with its largest principal city being the c ...
in central
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, United States. It connects several suburbs of Phoenix, including Tolleson, Glendale, Peoria, Scottsdale,
Mesa A mesa is an isolated, flat-topped elevation, ridge, or hill, bounded from all sides by steep escarpments and standing distinctly above a surrounding plain. Mesas consist of flat-lying soft sedimentary rocks, such as shales, capped by a ...
, Tempe, and Chandler. Construction began in 1986 and was completed in 2002. Loop 101 has three officially designated sections along its route: * Agua Fria Freeway in the west valley from I-10 to I-17 * Pima Freeway in the east valley from I-17 to Loop 202 (Red Mountain Freeway) * Price Freeway in the east valley from Loop 202 (Red Mountain Freeway) to Loop 202 (Santan Freeway)


Route description


Agua Fria Freeway

Loop 101 begins as the Agua Fria Freeway at a three-level interchange with I-10 in Tolleson west of Phoenix. From that point, the route heads north entering Phoenix then Glendale, passing State Farm Stadium and Desert Diamond Arena. Continuing northward through Peoria, it encounters the Grand Avenue portion of
US 60 U.S. Route 60 is a major east–west United States highway, traveling from southwestern Arizona to the Atlantic Ocean coast in Virginia. The highway's eastern terminus is in Virginia Beach, Virginia, where it is known as General Booth Bouleva ...
and passes the Peoria Sports Complex before entering northwestern Glendale and curving east just past the Arrowhead Towne Center mall. The route then heads east along the Beardsley Road alignment, traveling through the community of Arrowhead Ranch. The freeway enters northern Phoenix, and at
milepost A milestone is a numbered marker placed on a route such as a road, railway, railway line, canal or border, boundary. They can indicate the distance to towns, cities, and other places or landmarks like Mileage sign, mileage signs; or they c ...
23, Loop 101 intersects I-17 north of Downtown Phoenix.


Pima Freeway

Continuing east as the Pima Freeway, Loop 101 travels just south of Deer Valley Airport before intersecting the northern terminus of SR 51 at milepost 29. East of this junction, Loop 101 travels through Northern Phoenix, passing through Desert Ridge and passing by Desert Ridge Marketplace to its north, and
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to its south. The freeway then curves south through Scottsdale on the Pima Road alignment. The freeway then
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east and passes through the Salt River Pima-Maricopa Indian Community, just south of Via Linda providing access to Downtown Scottsdale, Scottsdale Pavilions, Scottsdale Community College, two
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s, and Scottsdale Fashion Square. Continuing south, Loop 101 encounters an interchange with the Red Mountain Freeway portion of Loop 202 in Tempe at milepost 51. This interchange is partially built over the Salt River.


Price Freeway

Loop 101 then becomes the Price Freeway and continues south. Just south of the interchange, the freeway passes Tempe Marketplace to the east, and Sloan Park to the west. The freeway then passes
Arizona State University Arizona State University (Arizona State or ASU) is a public university, public research university in Tempe, Arizona, United States. Founded in 1885 as Territorial Normal School by the 13th Arizona Territorial Legislature, the university is o ...
to the east. At milepost 53, the freeway provides access to Apache Boulevard, and the Price–101 Freeway/Apache Boulevard park and ride light rail station, on Valley Metro's A Line. The route then intersects the Superstition Freeway portion of US 60 at milepost 55 before entering Chandler. Loop 101 provides access to Chandler Fashion Center just prior to concluding at milepost 61 at an interchange with the Santan Freeway portion of Loop 202.


History


1985–2007: original construction

Loop 101 was a part of the 1985
Maricopa County Maricopa County () is a county in the south-central part of the U.S. state of Arizona. As of the 2020 census the population was 4,420,568, or about 62% of the state's total, making it the fourth-most populous county in the United States and ...
Regional Transportation Plan that was funded by a sales tax approved by Maricopa County voters that year. The
freeway A controlled-access highway is a type of highway that has been designed for high-speed vehicular traffic, with all traffic flow—ingress and egress—regulated. Common English terms are freeway, motorway, and expressway. Other similar terms ...
was originally assigned two different route numbers along its path: The Agua Fria Freeway portion was initially designated as SR 417, and the Pima/Price Freeway portion was initially designated as SR 117. The Loop 101 designation was first assigned on December 18, 1987, at which time the South Mountain Freeway and the portion of the San Tan Freeway between I-10 and Price Road were also designated to be part of Loop 101. On July 19, 1991, the proposed South Mountain Freeway was renumbered as part of Loop 202. The San Tan Freeway portion of Loop 101 has never officially been renumbered, though this freeway section has been signed as Loop 202 since its opening. In 1990, after several years of negotiation with the Salt River Pima–Maricopa Indian Community, the state of
Arizona Arizona is a U.S. state, state in the Southwestern United States, Southwestern region of the United States, sharing the Four Corners region of the western United States with Colorado, New Mexico, and Utah. It also borders Nevada to the nort ...
paid the tribe $247 million for right of way for the nine-mile eastern leg of Loop 101 from Via Linda to the north bank of the Salt River. The resulting alignment kept all four corners of each interchange on tribal land, allowing the community to control and benefit from development. The tribe formed a development arm, Salt River DevCo, to manage these and other community developable properties. Loop 101 was built in stages from 1986 to 2002. The first segment of Loop 101 opened in November 1988, consisting of the two-mile stretch from Peoria Avenue to Northern Avenue in Peoria. Throughout the next 14 years, the other 59 miles of the route would be built including the interchanges with I-10, I-17, both Loop 202 Freeways, and the US 60. The final segment that was built was the two-mile stretch from Scottsdale Road to Pima Road in Scottsdale that opened in April 2002, marking the full completion of the entire 61-mile route. Loop 101 was built with three general-purpose lanes in each direction along with one auxiliary lane with the exception of the three-mile stretch from Loop 202 (Red Mountain Freeway) to US 60 where there were four general-purpose lanes in each direction. In January 2006, Scottsdale installed speed enforcement cameras along its 7.8 mile stretch of Loop 101 to lower speeds and reduce collisions. There were six cameras placed in total, three in each direction. The system was calibrated to ticket anyone traveling or greater, as was the predetermined
speed limit Speed limits on road traffic, as used in most countries, set the legal maximum speed at which vehicles may travel on a given stretch of road. Speed limits are generally indicated on a traffic sign reflecting the maximum permitted speed, express ...
. The trial phase lasted from January to October 2006 before resuming full time in February 2007. There had been much criticism of the program since its inception, and it ended in 2010.


2007–present: recent improvements

Due to booming population growth in Phoenix's suburbs along the route of the freeway, the route has undergone many widening projects to accommodate the growth in the region, between 2007 and 2011,
HOV lanes A high-occupancy vehicle lane (also known as an HOV lane, carpool lane, diamond lane, 2+ lane, and transit lane or T2 or T3 lanes) is a restricted traffic lane reserved for the exclusive use of vehicles with a driver and at least one passenger, ...
were constructed along the entire route in different phases. It included construction of direct HOV ramps between Loop 101 east and SR 51 south in Northern Phoenix and Loop 101 north and Loop 202 east (Santan Freeway) in Chandler. The Maryland Avenue HOV interchange in Glendale began construction in October 2013 and was completed in March 2014. Due to the nature of the project, the HOV lanes near the exit had to widened for extra lane width. In August 2014, construction began to add a fourth general-purpose lane in each direction for the 11-mile segment from Shea Boulevard to Loop 202 in Scottsdale. Construction was completed in October 2016. The 64th Street interchange in northeast Phoenix opened in May 2015 after being built in 2008 during the initial build-out of the freeway. In February 2019, construction began to add a fourth general-purpose lane in each direction for the 13-mile segment from I-17 to Pima Road in Scottsdale and northeast Phoenix. Construction was completed in January 2022. In May 2019, construction began to add a fourth general-purpose lane in each direction for the 6.4-mile segment from Baseline Road to Loop 202 (Santan Freeway) in the East Valley. Construction was completed in August 2020. Construction began in January 2024 to add a fourth general-purpose lane in each direction for the 4.5-mile segment from Shea Boulevard to Princess Drive/Pima Road. Construction is expected to be completed in early 2026. Construction began in September 2024 to add a fourth general-purpose lane in each direction for the six-mile segment from 75th Avenue to I-17 in the northwest valley. Construction is expected to be completed in early 2027.


Future

ADOT, in partnership with MAG and the cities of Goodyear and Tolleson, plan to construct direct HOV lane connections at the I-10 interchange between Loop 101 and I-10 east. Construction is planned to begin in 2025 and be completed in 2027. The Northern Avenue interchange in Peoria is planned to be upgraded to a diverging diamond interchange (DDI). It will be the first DDI on Loop 101, and construction is expected to begin in 2025 and be completed in 2027.


Exit list


See also

* * *
Roads and freeways in metropolitan Phoenix The metropolitan area of Phoenix, Arizona, Phoenix in the U.S. state of Arizona contains one of the nation's largest and fastest-growing freeway systems, with over 1,405 lane miles (2,261 km) as of 2005 (this was before construction on the ...
* Loop 202 * Loop 303


References


External links


Agua Fria Loop 101 construction history

Pima Loop 101 construction history

Price Loop 101 construction history
{{Authority control 101 101 Transportation in Maricopa County, Arizona Transportation in Peoria, Arizona Transportation in Mesa, Arizona Transportation in Glendale, Arizona Transportation in Chandler, Arizona Transportation in Scottsdale, Arizona Transportation in Tempe, Arizona Beltways in the United States