I-19 highlighted in red
|Maintained by ADOT|
|Length||102.08 km (63.43 mi)|
|Counties||Santa Cruz, Pima|
Interstate 19 (I-19) is a north–south Interstate Highway located entirely within the U.S. state of Arizona. I-19 travels from Nogales, roughly 300 feet (91 m) from the Mexican border, to Tucson, at I-10. The highway also travels through the cities of Rio Rico, Green Valley, and Sahuarita.
In the United States, a state is a constituent political entity, of which there are currently 50. Bound together in a political union, each state holds governmental jurisdiction over a separate and defined geographic territory and shares its sovereignty with the federal government. Due to this shared sovereignty, Americans are citizens both of the federal republic and of the state in which they reside. State citizenship and residency are flexible, and no government approval is required to move between states, except for persons restricted by certain types of court orders. Four states use the term commonwealth rather than state in their full official names.
Arizona is a state in the southwestern region of the United States. It is also part of the Western and the Mountain states. It is the sixth largest and the 14th most populous of the 50 states. Its capital and largest city is Phoenix. Arizona shares the Four Corners region with Utah, Colorado, and New Mexico; its other neighboring states are Nevada and California to the west and the Mexican states of Sonora and Baja California to the south and southwest.
Nogales is a city in Santa Cruz County, Arizona. The population was 20,837 at the 2010 census and estimated 20,407 in 2014. Nogales forms part of the larger Tucson-Nogales combined statistical area, with a total population of 1,027,683 as of the 2010 Census. The city is the county seat of Santa Cruz County.
Having a total length of just over 63 miles (101 km), I-19 is the sixth-shortest primary (two-digit) Interstate Highway in the contiguous 48 states, where only I-97, I-86 (western), I-14, I-11 and I-2 are shorter.
Interstate 97 (I-97) is a part of the Interstate Highway System that runs entirely within Anne Arundel County, Maryland. The intrastate Interstate runs 17.62 miles (28.36 km) from U.S. Route 50 (US 50) and US 301 in Parole near Annapolis north to I-695 and I-895 in Brooklyn Park near Baltimore. The Interstate is the primary highway between Baltimore and Annapolis. I‑97 connects Annapolis with Baltimore–Washington International Airport and links the northern Anne Arundel County communities of Crownsville, Millersville, Severna Park, Glen Burnie, and Ferndale. It is the second shortest primary Interstate Highway after I-87 in North Carolina.
Interstate 86 (I-86) is an east–west intrastate Interstate Highway located entirely within the state of Idaho. It runs approximately 63 miles (101 km) from an intersection with I-84 east of Declo in rural Cassia County, to an intersection with I-15 in Chubbuck, just north of Pocatello. The highway is part of the main route from Boise and Twin Falls to Idaho Falls and the upper Snake River region.
Interstate 14 (I-14), also known as the "14th Amendment Highway", the Gulf Coast Strategic Highway and the Central Texas Corridor, is an Interstate Highway in the U.S. state of Texas that follows U.S. Highway 190 (US 190). The highway was named for the 14th Amendment. In 2005, I-14 was planned to have a western terminus at Natchez, Mississippi, extending east through Louisiana, Mississippi, and Alabama, before ending at Augusta, Georgia or North Augusta, South Carolina. Advocates of the Gulf-Coast Strategic Highway proposed extending I-14 to I-10 near Fort Stockton and the junction of US 277 and I-10 near Sonora, Texas.
While the highway is short, it is a very important corridor, serving as a fast route from Tucson and Phoenix (via I-10) to the Mexican border. The highway is a portion of the United States section of the CANAMEX Corridor, a trade corridor that stretches north from Mexico across the United States to the Canadian province of Alberta.
The CANAMEX corridor is a series of improvements to freeways and other transportation infrastructure linking Canada to Mexico through the United States. The corridor was established under the North American Free Trade Agreement. Currently the corridor is defined by a series of highways. However, the corridor is also proposed for use by railroads and fiber optic telecommunications infrastructure.
Mexico, officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatemala, Belize, and the Caribbean Sea; and to the east by the Gulf of Mexico. Covering almost 2,000,000 square kilometres (770,000 sq mi), the nation is the fifth largest country in the Americas by total area and the 13th largest independent state in the world. With an estimated population of over 120 million people, the country is the tenth most populous state and the most populous Spanish-speaking state in the world, while being the second most populous nation in Latin America after Brazil. Mexico is a federation comprising 31 states and Mexico City, a special federal entity that is also the capital city and its most populous city. Other metropolises in the state include Guadalajara, Monterrey, Puebla, Toluca, Tijuana and León.
Alberta is a western province of Canada. With an estimated population of 4,067,175 as of 2016 census, it is Canada's fourth most populous province and the most populous of Canada's three prairie provinces. Its area is about 660,000 square kilometres (250,000 sq mi). Alberta and its neighbour Saskatchewan were districts of the Northwest Territories until they were established as provinces on September 1, 1905. The premier is Jason Kenney as of April 30, 2019.
In Nogales, the southern terminus of I-19 is at West Crawford Street, adjacent to the international port of entry, and southbound travelers can continue into Nogales, Sonora, Mexico, via state-maintained surface roads, and connect with Mexico Federal Highway 15 either to the south or west of Nogales, Sonora.
Heroica Nogales, more commonly known as Nogales, is a city and the county seat of the Municipality of Nogales. It is located on the northern border of the Mexican state of Sonora. The city is abutted on its north by the city of Nogales, Arizona, across the U.S.-Mexico border.
Starting from the southern terminus at kilometer post 0, I-19 initially heads briefly south then west on surface streets, navigating its way through the town of Nogales for 0.2 miles (0.32 km) before becoming an Interstate–grade freeway and making the turn to head north toward Tucson. It has interchanges with two other state highways near the southern end of the route, State Route 189 (SR 189) at exit 4 and SR 289 at exit 12. The interchange with SR 189 at exit 4 both serves to funnel traffic so as to bypass around Nogales, Arizona, and Nogales, Sonora, for travelers bound to or from Hermosillo or Mexico City, and provides for the continuous flow of freight and truck traffic through the larger Mariposa Port of Entry to Highway 15, which has its northern terminus at the US–Mexico border with SR 189 and its southern terminus 2,179 kilometers (1,354 mi) away in Mexico City. After exiting Nogales to the north, I-19 passes near and around a series of sparsely-populated towns and retirement communities along the banks of the Santa Cruz River, including Rio Rico, Tubac, Amado, Green Valley, and Sahuarita. For several miles near Amado and Green Valley, the eastward view from I-19 provides scenic views of Madera Canyon and the Santa Rita Mountains in the Coronado National Forest.
Standards for Interstate Highways in the United States are defined by the American Association of State Highway and Transportation Officials (AASHTO) in the publication A Policy on Design Standards: Interstate System. For a certain highway to be considered an Interstate Highway, it must meet these construction requirements or obtain a waiver from the Federal Highway Administration.
State Route 189 is a highway in Santa Cruz County, Arizona that runs from its junction with Interstate 19 to the US-Mexico Border. It is a north–south route for its entirety.
State Route 289 is a highway in Santa Cruz County, Arizona that runs from its junction with Interstate 19 to the north of Nogales, to Peña Blanca Lake. It is an east–west route.
Just before entering Tucson, I-19 passes through the eastern section of the San Xavier Indian Reservation where it makes its only crossing of the Santa Cruz River. As I-19 enters the Tucson city limits, it has an interchange with SR 86 at exit 99 before reaching its northern terminus at an interchange with I-10.
Tucson is a city and the county seat of Pima County, Arizona, United States, and home to the University of Arizona. The 2010 United States Census put the population at 520,116, while the 2015 estimated population of the entire Tucson metropolitan statistical area (MSA) was 980,263. The Tucson MSA forms part of the larger Tucson-Nogales combined statistical area (CSA), with a total population of 1,010,025 as of the 2010 Census. Tucson is the second-largest populated city in Arizona behind Phoenix, both of which anchor the Arizona Sun Corridor. The city is 108 miles (174 km) southeast of Phoenix and 60 mi (97 km) north of the U.S.–Mexico border. Tucson is the 33rd largest city and the 58th largest metropolitan area in the United States (2014).
The San Xavier Indian Reservation is an Indian reservation of the Tohono O’odham Nation located near Tucson, Arizona, in the Sonoran Desert.The San Xavier Reservation lies in the southwestern part of the Tucson metropolitan area and consists of 111.543 sq mi (288.895 km²) of land area, about 2.5 percent of the Tohono O’odham Nation. It had a 2000 census resident population of 2,053 persons, or 19 percent of the Tohono O’odham population.
The Santa Cruz River is a river in Southern Arizona and northern Sonora, Mexico. It is approximately 184 miles (296 km) long.
Nearly the entire route of I-19 follows, or is adjacent to, the former routing of US 89 and the Santa Cruz River, which flows northward from Mexico, through Tucson and usually disperses into the desert between Marana and the Gila River, southeast of Phoenix. Most of the time, much of the river is dry, but heavy storms can cause it to overflow its banks, flooding farmland before reaching the Gila River.
I-19 is unique among US Interstates, because signed distances are given in meters (hundreds or thousands as distance-to-exit indications) or kilometers (as distance-to-destination indications), and not miles. However, the speed limit signs give speeds in miles per hour. According to the Arizona Department of Transportation (ADOT), metric signs were originally placed because of the push toward the metric system in the United States at the time of the original construction of the highway.
I-19 had originally been signed as it was constructed, in a series of small signing contracts that used customary units.In 1980, Arizona DOT awarded a single contract to install new signs which used metric units, to overlay English-unit expressions on some existing signs with metric-unit expressions, to install kilometerposts, and to provide bilingual signing in select locations. The signing scheme used in 1980 provided explicit units on advance guide signs, but not on interchange sequence signs or post-interchange confirmation (distance) signs.
The expressions on advance guide signs were of the form "2 km" for distances over 1 kilometer (0.62 mi) and "500 m" for distances under 1 kilometer (0.62 mi), with no provision for fractional kilometrages. On advance guide signs, the metric unit expressions "km" and "m" were placed on the baseline where "MILES" would otherwise have gone but were sized so that their lowercase loop height matched the uppercase letter height of "MILES" on customary-unit signs.
The exception was a handful of advance guide signs for the SR 86 (Ajo Way) exit, which used "KM" (in uppercase, contrary to SI nomenclature) on the same baseline and at the same letter height as "MILES." The 1980 signing plans also provided design details for speed limit and advisory speed signs using metric units, with the limit values enclosed in a red circle on the speed limit sign and a black circle on the yellow-background advisory signs. These speed signs all had explicit units, with "km/h" below the circle enclosing the limit value. However, the advisory signs were cancelled by change order and not installed.
Had the metric speed limit sign been installed, the signed speed limit on I-19 would have been 88 kilometers per hour (54.7 mph), which is a close soft-conversion of the then-existing 55 miles per hour (88.5 km/h) national maximum speed limit. Information signs, to three distinct designs, were also placed at various locations on or near I-19 to advise motorists that the highway was signed in metric. Notwithstanding the metric legends, the signing plans were dimensioned entirely in feet and inches.
In 1999, Arizona DOT awarded two contracts (administered as a single construction project) to renew the signs along the full length of I-19. The general approach toward metric signing differed from that taken in 1980. Explicit units were given not just on advance guide signs, but also on interchange sequence signs, post-interchange confirmation signs, and community interchange signs (the last-listed had not been used in 1980). On the distance signs, "km" appeared after each kilometer measurement except when one or more of the distances was a fractional kilometer.
In such cases, all the distances were given in meters with "meters" (written out in full, not "m") after each distance value. On distance signs in general, "km" or "meters" appeared on the same baseline and with the same letter height as the distance values, while advance guide signs were formatted as in 1980. Since a typical Arizona DOT freeway guide sign rehabilitation contract also replaces surface road signing near those roads' interchanges with the freeway, metric-unit signs also appeared on local roads near I-19, giving distances in kilometers to tourist attractions such as Mission San Xavier del Bac.
As was the case in 1980, the signing plans were dimensioned in feet and inches. 1 kilometer (0.62 mi), rendered as "1500 m," while others use "m" rather than "meters" as the unit expression. Metric unit expressions on the advance guide signs installed or modified as part of this contract appear on the same baseline as the metric values, rather than on a raised baseline as on other I-19 advance guide signs. Again, the plans were dimensioned in feet and inches.However, a number of signs near the Valencia Road interchange were replaced or amended when it was converted from a partial cloverleaf to a single-point urban interchange in 2000. One of these signs has a fractional kilometrage greater than
Citing motorist confusion arising from the metric signs on I-19, Arizona DOT's Tucson district announced that new signs on I-19 would use United States customary units. To avoid the cost of replacing the metric signs all at once, signs would be replaced in specific areas of the freeway during construction projects in those areas.New signs were put into place between Exit 99 (Ajo Way) and Exit 101 (I-10) in 2004 after the completion of the new Interstate 10–Interstate 19 interchange.
As of 2010, the remainder of the project has been stalled due to local opposition, particularly from businesses that would have to change their directions.
A recent reconstruction project at the Interstate's northern terminus with I-10 in Tucson (at the interchange commonly called the Crossing) was begun in 2002 and completed in August 2004.
The first sections of Interstate 19 to be opened to traffic were a three-mile (4.8 km) stub, from I-10 to Valencia Road, in 1962 and a two-mile (3.2 km) stretch in Green Valley in 1963. The freeway between Rio Rico and Nogales, Arizona was completed in 1974. The major section between Green Valley and Rio Rico was finished in 1978. The official completion date of the I-19 segment between Tucson (km 100) and Green Valley (actually Helmet Peak Road at km 75) was February 12, 1972. A 1978 project report for the Arizona Department of Transportation lists entire I-19 project as "completed", which includes segments between Green Valley and Nogales, Arizona.
I-19 is a very heavily traveled corridor in the Tucson metro area. The freeway is currently two lanes in both directions in all parts besides where it meets with I-10, where it is four lanes. Plans call to expand the freeway to up to five lanes in each direction by 2030 from the crossing with I-10 to San Xavier Road.Current plans call for the widening from Irvington to Ajo, bringing the freeway to three lanes in each direction. I-19 is also part of the proposed I-11 corridor.
|Santa Cruz||Nogales||0.00||0.00||ADOT defines this intersection as southern terminus; former US 89 / SR 93|
|0.28||0.17||West Street||At-grade intersection; south end of freeway; road continues as Compound Street|
|0.71||0.44||1A||International Street||Southbound exit only|
|1.90||1.18||1B||Western Avenue||Signed as exit 1 northbound|
|||8.55||5.31||8||Southbound left exit and northbound entrance; former US 89 / SR 93|
|17.53||10.89||17||Rio Rico Drive / Yavapai Drive|
|22.45||13.95||22||Peck Canyon Road|
|||25.17||15.64||25||Palo Parado Road|
|||29.34||18.23||29||Tumacacori-Carmen||Tumacácori National Historical Park|
|||40.10||24.92||40||Chavez Siding Road|
|||42.84||26.62||42||Agua Linda Road|
|Pima||Green Valley||56.26||34.96||56||Canoa Road|
|Sahuarita||69.72||43.32||69||Duval Mine Road||Former US 89 / SR 93; Titan Missile Museum|
|80.32||49.91||80||Pima Mine Road||Desert Diamond Casino, Tohono O'odham Nation|
|||87.98||54.67||87||Papago Road||Dead end, U-turn only|
|||92.04||57.19||92||San Xavier Road||Access to Mission San Xavier del Bac|
|Tucson||95.10||59.09||95||Tucson International Airport|
|101.63||63.15||101||Northbound exit and southbound entrance; I-10 exit 260|
|101.84||63.28||102||29th Street / 22nd Street / Silverlake Road / Starr Pass Boulevard||Northbound exit and southbound entrance|
|102.08||63.43||—||Northern terminus; I-10 exit 260|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|
|Length||5.88 mi (9.46 km)|
Interstate 19 has one business route which begins at the Mexican border in Nogales near the southern end of the Interstate. I-19 Business follows Grand Avenue in Nogales and has intersections with SR 82 and SR 189 before terminating at I-19 just north of Nogales. The route follows the former alignment of US 89 and SR 93 , back when both highways traversed through southern Arizona.
The entire route is in Santa Cruz County.
|Nogales||0.00||0.00||International border with Mexico; southern terminus; continues south as Mexican Federal Highway 15|
|0.14||0.23||ADOT defines this intersection as southern terminus of I-19|
|||5.88||9.46||Northern terminus; no access to I-19 south|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|
Interstate 10 (I-10) is the southernmost cross-country interstate highway in the American Interstate Highway System. It stretches from the Pacific Ocean at California State Route 1 in Santa Monica, California, to I-95 in Jacksonville, Florida. Major cities connected by I-10 include Los Angeles, Phoenix, Tucson, El Paso, San Antonio, Houston, Baton Rouge, New Orleans, Mobile, Pensacola and Jacksonville. This freeway is part of the originally planned interstate highway network that was laid out in 1956, and its last section was completed in 1990. I-10 is the fourth-longest interstate highway in the United States, following I-90, I-80, and I-40. About one-third of its length is within the state of Texas, where the freeway spans the state at its widest breadth.
Interstate 17 (I-17) is an Interstate Highway located entirely within the U.S. state of Arizona. I-17's southern terminus lies within Phoenix, at Interstate 10, and its northern terminus is in Flagstaff, at Interstate 40. The majority of I-17 is known as the Arizona Veterans Highway. In the Phoenix metropolitan area, it is mostly known as the Black Canyon Freeway, however the southern 4.16 miles (6.69 km) is part of the Maricopa Freeway. The portion of the highway south of Cordes Lakes was built along the alignment of SR 69, while the northern part was built along old SR 79's alignment. I-17 is one of the most scenic Interstate Highways as it gains more than a mile in altitude between Phoenix at 1,117 feet (340 m) and Flagstaff at 7,000 feet (2,100 m). The highway features several scenic view exits along its route that overlook the many mountains and valleys found in northern Arizona.
Interstate 89 (I-89) is an Interstate Highway in the New England region of the United States traveling from Bow, New Hampshire, to the Canadian border between Highgate Springs, Vermont, and Saint-Armand, Quebec. As with all odd-numbered primary interstates, I-89 is signed as a north–south highway. However, it follows a primarily northwest-to-southeast path. The route forms a substantial part of the main connection between the cities of Montreal and Boston. In Quebec the route continues as Quebec Route 133. The eventual completion of Autoroute 35 from Montreal will lead to a non-stop limited access highway route between the two cities, following I-93 south from I-89's terminus. The largest cities directly served by I-89 are Concord, the state capital of New Hampshire, Montpelier, the state capital of Vermont, and Burlington, Vermont. I-89 is one of three main Interstate highways whose route is located entirely within New England, along with I-91 and I-93.
State Route 58 is a major east-west highway across the California Coast Ranges, the southern San Joaquin Valley, the Tehachapi Mountains, which border the southern Sierra Nevada, and the Mojave Desert. It runs between Santa Margarita and Barstow. It has junctions with Interstate 5 near Buttonwillow, State Route 99 in Bakersfield, State Route 202 in Tehachapi, State Route 14 near Mojave, and U.S. Route 395 at Kramer Junction. SR 58 gives good access to Edwards Air Force Base. At various points it is known as the Calf Canyon Highway, Carrisa Highway, Bakersfield-McKittrick Highway, Rosa Parks Highway, Rosedale Highway, Barstow-Bakersfield Highway, Kern County Korean War Veterans Memorial Highway, and Mojave-Barstow Highway.
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State Route 87 is a north–south road that travels from I-10 near Picacho northward to SR 264 near Second Mesa.
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U.S. Route 60 (US 60) is an east–west United States Highway within Arizona. The highway runs for 369 miles (594 km) from a junction with Interstate 10 near Quartzsite to the New Mexico State Line near Springerville. As it crosses the state, US 60 overlaps at various points: I-17, I-10, SR 77, SR 260, US 191, and US 180. Between Wickenburg and Phoenix, the route is known as Grand Avenue. From Tempe to Apache Junction, it is known as the Superstition Freeway.
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Arizona State Route 93, abbreviated SR 93, was a state highway in Arizona that existed from 1946 to 1991. The route was co-signed with other highways along nearly all of its route from Kingman to the border at Nogales. SR 93 was the original designation for the highway from Kingman to Wickenburg, which was built in 1946. In 1965, the northern terminus of the state route was moved south to an unnamed desert junction with U.S. Route 89 just north of Wickenburg, and the southern terminus of U.S. Route 93 was moved south to the US 89 junction. The Arizona Highway Department sought U.S. Highway status for SR 93 across the rest of the state, but the proposal was never granted by AASHTO. On December 17, 1984, the SR 93 designation was removed south of the Grand Avenue/Van Buren Street/7th Avenue intersection in Phoenix. The route was completely decommissioned in 1991.
The transportation system of Arizona comprises rail, air, bus, car and bicycle transport.
In the U.S. state of Arizona, U.S. Route 93 is a U.S. Highway that begins in Wickenburg and heads north to the Nevada state line at the Mike O'Callaghan–Pat Tillman Memorial Bridge.
The metropolitan area of Phoenix in the U.S. state of Arizona contains one of the nation's largest and fastest-growing freeway systems, boasting over 1,405 lane miles as of 2005.
Interstate business routes are roads connecting a central or commercial district of a city or town with an Interstate bypass. These roads typically follow along local streets often along a former U.S. route or state highway that had been replaced by an Interstate. Interstate business route reassurance markers are signed as either loops or spurs using a green shield shaped and numbered like the shield of the parent Interstate highway.
U.S. Route 80 also known as the Ocean-to-Ocean Highway, the Broadway of America and the Jefferson Davis Highway was a major transcontinental highway which existed in the U.S. state of Arizona from November 11, 1926, to October 6, 1989. At its peak, US 80 traveled from the California border in Yuma to the New Mexico state line near Lordsburg. US 80 was an important highway in the development of Arizona's car culture. Like its northern counterpart, US 66, the popularity of travel along US 80 helped lead to the establishment of many unique road side businesses and attractions, including many iconic motor hotels and restaurants.
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