CANAMEX Corridor

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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.[1] 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.[1]


While the tri-lateral corridor was defined in NAFTA, the U.S. portion of CANAMEX Trade Corridor was outlined in 1991 in the "ISTEA" highway bill, and defined by Congress in the 1995 National Highway Systems Designation Act, Public Law 104-59, November 28, 1995.[2]

Route description[edit]

The CANAMEX corridor is defined by the numbered highway designations along its length:


United States



The United States portion of the highway was established as a High Priority Corridor. The treaty establishes that the CANAMEX highway will be upgraded to at least 4 lanes along its entire length. In 2008, 84% of the highway in the United States was compliant, and 86% of the highway in Mexico was compliant.[4]

When the corridor was first approved, two bottlenecks were identified with the Arizona portion of the corridor that required significant infrastructure to address. The first was the route of U.S. Route 93 across northwestern Arizona, which at the time included a slow route with numerous hairpin curves over the Hoover Dam. The Hoover Dam Bypass opened on October 16, 2010, resolving this issue.[5]

The second issue was a gap near Phoenix. The official designation is Interstate 10 to U.S. Route 93 at Phoenix. However, US 93 does not enter Phoenix or connect with I-10. US 93 currently terminates at Wickenburg, northwest of Phoenix. To make this connection originally required driving U.S. Route 60, a surface street through the western suburbs of Phoenix, not compliant with the standards established by the treaty. The chosen alternative for resolution involved creating a compliant connection between Wickenburg and Phoenix via upgrades and extensions to Arizona State Route 303.[4][6] Most of the upgrades have been completed, with the final phase expected to be complete by the end of 2016.[7] A second proposal has since been made for a freeway connection between Las Vegas, Nevada and Casa Grande, Arizona, Interstate 11, that would in its course connect Wickenburg to Phoenix.


NAFTA also established the CANAMEX corridor for rail usage. While most of the corridor is paralleled by existing rail lines, there is no existing contiguous line that follows the entire corridor, and through rail traffic from Canada to Mexico would have to use alternate corridors for at least parts of the journey. The Union Pacific Railroad owns and operates a rail line following the corridor between Nogales, Sonora, Mexico, and Phoenix, Arizona, acquired from the former Southern Pacific Railroad. There is no railroad directly connecting and Phoenix and Las Vegas, Nevada, however it is possible to route trains between these cities via Barstow, California along tracks owned by Arizona and California Railway and/or BNSF Railway. The Union Pacific again owns tracks following the I-15 portion of the corridor from Las Vegas, to Butte, Montana, acquired from the former Los Angeles and Salt Lake Railroad and Oregon Short Line. No line directly follows the corridor between Butte and Helena, Montana, however it is possible to route trains between these cities via a combination of BNSF Railway and Montana Rail Link lines. North of Helena, BNSF owns lines that closely follow the CANAMEX corridor, including a connection with the Canadian Pacific Railway at Coutts, Alberta, Canada, acquired from the former Great Northern Railway.

See also[edit]


  1. ^ a b "CANAMEX Corridor". Canamex Coalition. Archived from the original on 2008-01-10. Retrieved 2008-01-12.
  2. ^ CANAMEX Corridor Coalition, Federal Definition – The CANAMEX Trade Corridor Archived 2013-07-29 at the Wayback Machine (retrieved 8 Nov. 2015)
  3. ^ "Federal Definition". Canamex coalition. Archived from the original on 2013-07-29. Retrieved 2013-08-16.
  4. ^ a b "CANAMEX statistics". Archived from the original on 2008-01-10. Retrieved 2008-01-12.
  5. ^ Illia, Tony; Cho, Aileen (7 December 2009). "Buffeted by High Winds and Setbacks, a Bypass Is Making History Near Hoover Dam". Engineering News-Record. New York: The McGraw-Hill Companies. 263 (18): 18. ISSN 0891-9526. Archived from the original on 6 December 2009. (The crossing) is scheduled to open in November 2010.
  6. ^ Andy Field and Alex Nitzman. "CANAMEX (High Priority Corridor 26)". AARoads.
  7. ^ "Loop 303 Improvement Projects". Arizona Department of Transportation. Archived from the original on January 17, 2017. Retrieved May 24, 2016.

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