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As Interstate 19 North begins in Nogales, the speed limit starts out at 55 mph. (Photo taken 5/20/15). |
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Arizona welcome sign on Interstate 19 North in Nogales for those folks who just crossed the border from Mexico. (Photo taken 5/20/15). |
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Interstate 19 North at Exit 1: Western Ave (Photo taken 5/20/15). |
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Interstate 19 North at kilometer marker 2. I-19 is the only Interstate in the country to be marked by the kilometer rather than by the mile. Its exits are numbered by the kilometer accordingly. (Photo taken 5/20/15). |
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Interstate 19 North assurance shield near kilometer marker 3. (Photo taken 5/20/15). |
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The speed limit increases to 75 mph near kilometer marker 3. Although I-19 is (Photo taken 5/20/15).marked by the kilometer, its speed limits are still based on miles per hour. (Photo taken 5/20/15). |
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Interstate 19 North at Exit 4: AZ 189 South - Mariposa Rd (Photo taken 5/20/15). |
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Another speed limit sign at kilometer marker 6. Speed Limit - 75 mph, which is the standard on most rural stretches of Interstate in Arizona. (Photo taken 5/20/15). |
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Interstate 19 North at kilometer marker 8. The reason for I-19 being marked by the kilometer is because there was a push to switch the Interstate system to all metric in the U.S. years ago, near the time when I-19 was planned and finished. (Photo taken 5/20/15). |
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Take Exit 12 to Pena Blanca Lake Recreational Area. (Photo taken 5/20/15). |
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Take Exit 12 to Nogales Ranger Station and Pena Blanca Lake. (Photo taken 5/20/15). |
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Take Exit 12 to Ruby Rd and Nogales Ranger Station. These signs for Exit 12 are getting a little repetitive, aren't they? (Photo taken 5/20/15). |
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Interstate 19 North at Exit 12: AZ 289 West - Ruby Rd (Photo taken 5/20/15). |
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Interstate 19 North assurance shield north of Exit 12. (Photo taken 5/20/15). |
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Sign listing the distances to the upcoming exits to Rio Rico. (Photo taken 5/20/15). |
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Take either of the next 2 exits to Rio Rico. (Photo taken 5/20/15). |
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Interstate 19 North: Road view from kilometer marker 15. (Photo taken 5/20/15). |
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Interstate 19 North at Exit 17: Rio Rico Dr / Yavapai Dr (Photo taken 5/20/15). |
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Speed Limit assurance sign on Interstate 19 North. Speed Limit - 75 mph. (Photo taken 5/20/15). |
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Distance sign on Interstate 19 North. It's 10 kilometers to Tumacacori, 46 kilometers to Green Valley, and 84 kilometers to Tucson. (Photo taken 5/20/15). |
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Interstate 19 North at kilometer marker 20. (Photo taken 5/20/15). |
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Interstate 19 North at Exit 22: Peck Canyon Rd (Photo taken 5/20/15). |
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Interstate 19 North at Exit 25: Palo Parado Rd (Photo taken 5/20/15). |
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Interstate 19 North: Road view from kilometer marker 26. (Photo taken 5/20/15). |
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View on Interstate 19 North near kilometer marker 28. (Photo taken 5/20/15). |
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Take Exit 29 to Tumacacori National Historical Park. (Photo taken 5/20/15). |
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Interstate 19 North at Exit 29: Tumacacori / Carmen (Photo taken 5/20/15). |
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Interstate 19 North at kilometer marker 30. (Photo taken 5/20/15). |
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Interstate 19 North approaching Exit 34 - 2 kilometers. (Photo taken 5/20/15). |
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Take Exit 34 to Tubac Presidio State Historic Park. (Photo taken 5/20/15). |
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Interstate 19 North at Exit 34: Tubac (Photo taken 5/20/15). |
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Interstate 19 North at kilometer marker 36. (Photo taken 5/20/15). |
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Distance sign near kilometer marker 36.5. It's 4 kilometers to Amado, 29 kilometers to Green Valley, and 67 kilometers to Tucson. (Photo taken 5/20/15). |
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Interstate 19 North approaching the Border Patrol Check Point - 2 miles. That's right, they went with miles for this sign. (Photo taken 5/20/15). |
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As you begin to approach the Border Patrol Checkpoint, the speed limit decreases to 65 mph. (Photo taken 5/20/15). |
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Interstate 19 North at Exit 40: Chavez Siding Rd (Photo taken 5/20/15). |
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This sign lists the distances to the two upcoming exits to Amado. (Photo taken 5/20/15). |
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At kilometer marker 40, the speed limit decreases to 45 mph as we near the Border Patrol Checkpoint. (Photo taken 5/20/15). |
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As the Border Patrol Checkpoint comes into view, the speed limit decreases even further to 25 mph. (Photo taken 5/20/15). |
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Prepare to stop ahead at the checkpoint. (Photo taken 5/20/15). |
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All traffic must stop at Border Patrol. (Photo taken 5/20/15). |
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As a courtesy to those in front of you and the Border Patrol officers, motorists are advised to use their low beams. (Photo taken 5/20/15). |
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Interstate 19 North approaching the Border Patrol Checkpoint. (Photo taken 5/20/15). |
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Interstate 19 North at the Border Patrol Checkpoint, near kilometer marker 41. (Photo taken 5/20/15). |
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Once through the checkpoint, the standard speed limit of 75 mph resumes. (Photo taken 5/20/15). |
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Interstate 19 North at Exit 42: Agua Linda Rd (Photo taken 5/20/15). |
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Interstate 19 North at Exit 48: Arivaca Rd (Photo taken 5/20/15). |
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Interstate 19 North entering Pima County. (Photo taken 5/20/15). |
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Interstate 19 North assurance shield. (Photo taken 5/20/15). |
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Distance sign near kilometer marker 51. It's 3 kilometers to the upcoming Rest Area, 15 kilometers to Green Valley, and 53 kilometers to Tucson. (Photo taken 5/20/15). |
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Interstate 19 North at kilometer marker 52. (Photo taken 5/20/15). |
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Interstate 19 North at the Rest Area located near kilometer marker 53. (Photo taken 5/20/15). |
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Interstate 19 North at kilometer marker 54. (Photo taken 5/20/15). |
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Take any of the next 4 exits to Green Valley. (Photo taken 5/20/15). |
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Interstate 19 North at Exit 56: Canoa Rd (Photo taken 5/20/15). |