Interstate 19 south
On the ramp from Interstate 10 westbound to Interstate 19 southbound, we see the first signage for Ajo Way, Exit 99. Photo taken 01/13/06.
Exit 99, Ajo Way, is also Arizona 86. Photo taken 01/13/06.
The next three exits are Ajo Way, Irvington Road and Valencia Road. Photo taken 01/13/06.
Exit 99 departs here for Ajo Way. Photo taken 01/13/06.
This sign warns travellers that Interstate 19 is a Metric highway. When the highway was signed in Metric during 1979, ADOT wanted to make the whole thing, including speed limit signs, metric - but the metric conversion of 55 MPH to 90 KPH worked out to 55.8 MPH, just over the then-national speed limit. Photo taken 01/13/06.
Advance signage for exit 98, Irvington Road, one kilometer. Photo taken 01/13/06.
Southbound Interstate 19 at Exit 98, Irvington Road. Irvington Road leads west to meet Arizona 86 (Ajo Highway) south of Tucson Mountain Park, and it connects to Interstate 10 at Exit 264 southwest of the Davis-Monthan Air Force Base. Photo taken 01/13/06.
Southbound Interstate 19 approaching Exit 95, Valencia Road/Tucson International Airport, three kilometers. Valencia Road skims the northern edge of the airport, and it connects with Interstate 10 at Exit 267, the eastern end of unsigned Business Loop I-10/Tucson-Benson Highway. Photo taken 01/13/06.
Southbound Interstate 19 approaching Exit 95, Valencia Road/Tucson International Airport, one kilometer. Photo taken 01/13/06.
Southbound Interstate 19 at Exit 95, Valencia Road/Tucson International Airport. This is the last Tucson urban interchange along southbound. Photo taken 01/13/06.
View of the Valencia Road overpass as seen along southbound Interstate 19. Some serious beautification funds were used to make this interchange prettier than any other along Interstate 19. Note that this is a single point urban interchange and that there is room for expansion of Interstate 19 to at least six if not eight lanes under Valencia Road. Photo taken 01/13/06.
Southbound Interstate 19 approaching Exit 92, San Xavier Road, one kilometer. The freeway enters the San Xavier Indian Reservation near Kilometerpost 93. Photo taken 01/13/06.
Southbound Interstate 19 approaching Exit 92, San Xavier Road. Photo taken 01/13/06.
Southbound Interstate 19 approaching Exit 87, Papago Road, one kilometer. Photo taken 01/13/06.
Southbound Interstate 19 at Exit 87, Papago Road. There are several "distinctly Arizona" names used for several of the upcoming exit, including Papago, which is also the name of Interstate 10 west of downtown Phoenix. Others including Pima and Yavapai. Photo taken 01/13/06.
First mileage sign along southbound Interstate 19 for Green Valley, Amado, and Nogales. Interstate 19 ends in Nogales just prior to the International Border with Mexico. Photo taken 01/13/06.
Advance signage for exit 80, Pima Mine Road, two kilometers. Photo taken 01/13/06.
Southbound Interstate 19 at Exit 80, Pima Mine Road. Photo taken 01/13/06.
Southbound Interstate 19 exiting the San Xavier (Tohono O'Odham) Indian Reservation. Photo taken 01/13/06.
Southbound Interstate 19 approaching Exit 75, Sahuarita Road, one kilometer. This road leads east to meet Business Loop I-19 in Sahuarita. Photo taken 07/26/08.
Southbound Interstate 19 at Exit 75, Sahuarita Road. Photo taken 07/26/08.
This new distance sign shows the distance to the next three Geen Valley Exits. Interestingly, this sign was placed in 2008, after the Metric freeway was supposed to be converted progressively back to English units. Photo taken 07/26/08.
Southbound Interstate 19 approaching Exit 69, Junction Northbound Business Loop I-19/Duval Mine Road. This business loop is old U.S. 89, and it parallels Interstate 19 from here north to Tucson. The business loop ends at its junction with Interstate 10 just east of the northern terminus of Interstate 19. The business loop does not extend south into the city of Green Valley. Photo taken 07/26/08.
Rather than place the business loop shield on the advance signs, the only indication that Exit 69 was a business loop is this standalone shield along southbound. This sign has been removed with the decommissioning of the Business Loop. Photo taken 05/24/03.
Southbound Interstate 19 at Exit 69, Northbound Business Loop I-19/Duval Mine Road. Photo taken 07/26/08.
Southbound Interstate 19 approaching Exit 65, Esperanza Boulevard/Green Valley, two kilometers. Photo taken 07/26/08.
Southbound Interstate 19 at Exit 65, Esperanza Boulevard into Green Valley. Photo taken 07/26/08.
Southbound Interstate 19 approaching Exit 63, Continental Road. Photo taken 07/26/08.
Use Exit 63 to reach the Madera Canyon recreation area, part of the Coronado National Forest. Photo taken 07/26/08.
Southbound Interstate 19 at Exit 63, Continental Road. Photo taken 07/26/08.
Southbound Interstate 19 approaching Exit 56, Canoa Road, two kilometers. Photo taken 07/26/08.
Southbound Interstate 19 at Exit 56, Canoa Road. Photo taken 07/26/08.
Interstate 19 is well-signed with reassurance markers, like this one. Photo taken 07/26/08.
Just south of Canoa Road is the Canoa Ranch rest area, the only one along Interstate 19. Photo taken 07/26/08.
Mileage sign along southbound Interstate 19 for the two exits into Amado. Photo taken 07/26/08.
The riparian environ of most of Interstate 19 provides for more vegetation and greenery than would normally be found through the desert. Bushes and trees along the median are quite common between Tucson and Nogales, giving Interstate 19 a parkway feel to it. The next exit is for Exit 48, Arivaca Road, two kilometers. Photo taken 07/26/08.
Southbound Interstate 19 approaching Exit 48, Arivaca Road. Interstate 19 leaves Pima County and enters Santa Cruz County near Exit 48. Photo taken 07/26/08.
Interstate 19 leaves Pima County here and enters Santa Cruz County. Photo taken 07/26/08.
Southbound Interstate 19 approaching Exit 42, Agua Linda Road. Photo taken 07/26/08.
Southbound Interstate 19 at Exit 42, Agua Linda Road. Photo taken 07/26/08.
Southbound Interstate 19 approaching Exit 40, Chavez Siding Road/Tubac. Photo taken 07/26/08.
Southbound Interstate 19 approaching Exit 40, Chavez Siding Road/Tubac, 500 meters. Photo taken 07/26/08.
Southbound Interstate 19 at Exit 40, Chavez Siding Road/Tubac. Photo taken 07/26/08.
Southbound Interstate 19 approaching Exit 34, Tubac/Historic U.S. 89, two kilometers. The old highway stays close to the Santa Cruz River. Photo taken 07/26/08.
Use Exit 34 for Tubac State Historical Park. Photo taken 07/26/08.
Southbound Interstate 19 at Exit 34, Tubac. This exit connects to former U.S. 89 through Tubac, Carmen, and Tumacacori. Photo taken 07/26/08.
Reassurance marker for Interstate 19 southbound. Photo taken 07/26/08.
Mileage sign along southbound Interstate 19 after Exit 34 for Tumacacori, Arizona 289 to Pena Blanca Lake, and Nogales. Photo taken 07/26/08.
Southbound Interstate 19 approaching Exit 29, Tumacacori/Carmen, two kilometers. Photo taken 07/26/08.
Tumacacori National Historic Park is located just east of Interstate 19 adjacent to the Santa Cruz River via Exit 29. Photo taken 07/26/08.
Southbound Interstate 19 at Exit 29, Tumacacori/Carmen. This exit connects to the southern end of an old section of U.S. 89. Photo taken 07/26/08.
Southbound Interstate 19 approaching Exit 25, Palo Parado Road, two kilometers. Photo taken 07/26/08.
Southbound Interstate 19 at Exit 25, Palo Parado Road. Photo taken 07/26/08.
Southbound Interstate 19 approaching Exit 22, Peck Canyon Road, one kilometer. Coronado National Forest lies west of Interstate 19 between Kilometerpost 40 and the International Border. Photo taken 05/24/03.
Southbound Interstate 19 at Exit 22, Peck Canyon Road. Photo taken 07/26/08.
Southbound Interstate 19 approaching Exit 17, Rio Rico Drive/Yavapai Drive, one kilometer. Photo taken 07/26/08.
Southbound Interstate 19 at Exit 17, Rio Rico Drive/Yavapai Drive. Photo taken 07/26/08.
Mileage sign along southbound Interstate 19 for Arizona 289, Nogales, and International Border. "International Border" is a control city used by southbound Interstate 5 and Interstate 805 in San Diego County, California. Photo taken 07/26/08.
Southbound Interstate 19 approaching Exit 12, Junction Westbound Arizona 289, two kilometers. This is a brown sign since the highway connects to a recreational area. Photo taken 07/26/08.
2 photos
2 photos
Southbound Interstate 19 approaching Exit 12 for Westbound Arizona 289, one kilometer. This is one of three Arizona x89 routes; the others are Arizona 189 (truck bypass around Nogales to Mexico Federal Route 15) and Arizona 389 (in northern Arizona between U.S. 89A in Fredonia and Utah 59 north of Colorado City). Arizona 189 and 289 are remnants related to former U.S. 89, which was dropped south of Flagstaff in 1993. Photo taken 07/26/08. Second photo taken 05/24/03.
Southbound Interstate 19 approaching Exit 12, Westbound Arizona 289/Ruby Road en route to Coronado National Forest. Photo taken 07/26/08.
2 photos
2 photos
Southbound Interstate 19 at Exit 12, Junction Westbound Arizona 289 to the Pena Blanca Lake Recreation Area in the Coronado National Forest. Arizona 289 is not a through route; it does not extend beyond Pena Blanca Lake. Photo taken 07/26/08. Second photo taken 05/24/03.
2 photos
2 photos
The last mileage sign along southbound shows the mileage to three of the final four exits: Exit 8 to Business Loop I-19/Grand Avenue; Exit 4 to Arizona 189/Truck Route/Mariposa Road; and Exit 1B to Western Avenue. The final exit (not listed) is Exit 1A, International Street. Photo taken 05/24/03. Second photo taken 07/26/08.
This is the only sign along southbound that Exit 8 is for Business Loop I-19. The following exit, Exit 4, has motorist services, but it does not connect directly to the business route. Photo taken 07/26/08.
Southbound Interstate 19 approaching Exit 8, Junction Southbound Business Loop I-19, two kilometers. Photo taken 07/26/08.
Business Loop I-19 connects to Arizona 82 east of downtown Nogales, providing a connection to Patagonia and Tombstone. However, since Arizona 82 leads northeast toward Tombstone, it is a bit out of the way for southbound traffic to use it. Travelers from Tucson should use Interstate 10 and Arizona 80 for a much faster route to Tombstone. Photo taken 07/26/08.
Signs similar to this are common at other border crossings into Mexico, including a nearly identical sign along California 905 as it approaches the port of entry in Otay Mesa/San Diego. Photo taken 07/26/08.
Southbound Interstate 19 approaching Exit 8, Junction Southbound Business Loop I-19, 500 meters. For whatever reason, the business loop shield is omitted from most of these signs. Perhaps they were installed around the same time that U.S. 89 was removed from the route in 1993. Either way, Grand Avenue provides an alternate into Nogales, and it rejoins Interstate 19 at the Arroyo Boulevard traffic signal (see the last photo in this series). Photo taken 07/26/08.
Southbound Interstate 19 at Exit 8, Junction Southbound Business Loop I-19/Grand Avenue (left exit). The business loop follows original U.S. 89 east of but parallel to the freeway. Photo taken 07/26/08.
Southbound Interstate 19 entering the city of Nogales. Photo taken 07/26/08.
Arizona 189 is also known as Mariposa Road, as evidenced by this sign along southbound. Photo taken 07/26/08.
Southbound Interstate 19 approaching Exit 4, Junction Westbound Arizona 189/Mariposa Road/Truck Bypass to Mexico, one kilometer. Photo taken 07/26/08.
Southbound Interstate 19 at Exit 4, Arizona 189/Mariposa Road. In keeping with the Arizona standard of numbering spur and auxiliary routes based on their parents, Arizona 189 is a spur of the now-defunct U.S. 89. Arizona 189 leads southwest to a port of entry west of downtown Nogales for trucks. It is a four lane highway that avoids the congestion of the main port of entry. At this point, Interstate 19 assumes a more southeasterly direction as it heads toward downtown Nogales. Photo taken 07/26/08.
Southbound Interstate 19 approaching Exit 1B, Western Avenue, one kilometer. Perhaps indicative of the size of Nogales, the freeway still has not taken an urban feel, even though its southern terminus is less than a mile away. Photo taken 01/13/06.
Southbound Interstate 19 at Exit 1B, Western Avenue. The freeway loses its rural character and prepares to end. Speed advisory signs ensue after this exit. Photo taken 01/13/06.
Immediately after Exit 1B is the bridge over Western Avenue. Photo taken 05/24/03.
The final exit of Interstate 19 is Exit 1A, International Street. Interstate 19 takes on a slightly more urban feel for its remaining distance. Photo taken 01/13/06.
There are no services located along International Street (Exit 1A), so southbound traffic is advised to continue straight ahead. Some of the services are located along the boulevard between the southern end of the freeway and Arroyo Boulevard (Business Loop I-19), while others are located downtown along the business route. Photo taken 05/24/03.
Again the speed limit drops, this time to 35 miles per hour. The freeway turns to the east now, paralleling the international border as it approaches downtown Nogales. Photo taken 05/24/03.
A cut was made through this hill on the final mile of Interstate 19. The final exit, Exit 1A for International Street, is just ahead. Note the tree-lined median resumes here, just as the median was in Tucson. Photo taken 05/24/03.
Southbound Interstate 19 at Exit 1A, International Street. International Street parallels the U.S.-Mexico Border west of the port of entry; this exit connects the freeway to it via an auxiliary street. There are no "END" Interstate 19 shield assemblies present along southbound. Photo taken 01/13/06.
Interstate 19 downgrades to a highway and immediately sees a decrease in the speed limit to 25 miles per hour. Downtown Nogales, along with the border crossing into Mexico, is just ahead. Although the aforementioned traffic signal is still "ahead," the highway is no longer Interstate standard. Interstate 19 comes to its end here. Photo taken 01/13/06.
Nogales is a fairly small border city, even though it rests at the southern end of an Interstate highway. In this photo, the border fence between the United States and Mexico is clearly visible on the hillside; at this point, traffic is headed nearly due east as the highway heads toward downtown Nogales. For motorists en route to Mexico, the highway crosses into Mexico and meets Mexico Federal Route 15 in Nogales, Sonora, Mexico. Mexico Federal Route 15 is a major through highway that goes all the way south to Mexico City, a distance of 1,357 miles! Photo taken 01/13/06.
Due to right of way issues, the last portion of the journey to the border is via surface streets, with no direct freeway access to the port of entry. There are even intersections without traffic signals along this final stretch. Photo taken 05/24/03.
After the last exit, the freeway downgrades to this divided boulevard, including tight turns such as this one prior to reaching the border crossing. Photo taken 05/24/03.
The last half-mile after Interstate 19 is an unsigned state-maintained highway, connecting the freeway with the border crossing and the business loop. This sign indicates that traffic headed for downtown Nogales should turn left along northbound Business Loop I-19 while others en route to Mexico should stay right. Photo taken 05/24/03.
Finally reaching Arroyo Boulevard, motorists may turn right into Mexico or left onto northbound Business Loop I-19 (Former U.S. 89). Photo taken 05/24/03.



Photo Credits:

  • 05/24/03 by AARoads.
  • 01/13/06 by AARoads.
  • 07/26/08 by Kevin Trinkle.

Connect with:
Arizona 86
Arizona 189
Arizona 389

Page Updated 07-27-2008.