Interstate 69 (I-69) is an Interstate Highway in the Unite States. It exists in two parts: a completed highway from Indianapolis, Indiana, northeast to the Canadian border in Port Huron, Michigan, and a mostly-proposed extension southwest to the Mexican border in Texas. Of this extension, nicknamed the NAFTA Superhighway, since it would help trade with Canada and Mexico spurred by the North American Free Trade Agreement, only a short piece in northwestern Mississippi has been built and signed as I-69 (see Interstate 69 in Mississippi). Other sections, such as those in Kentucky and Tennessee, exist but are yet to be signed.