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I10 is the southernmost interstate in the Interstate Highway System, I10 measures over 2,400 miles in length. The last section was completed in 1990 and in some places, the highway totals eight lanes across. In Texas, the speed limit along I-10 was changed to 80 miles per hour in 2006. In California, the I10 is often referred to as the Santa Monica Freeway.
In fact, much of I10 runs through Texas, as well as California, Nevada, Arizona, New Mexico, Louisiana, Mississippi, Alabama, and Florida. It is one of the few highways that spans the length of the nation, besides I80 and I90. Each north-south highway connects to I10 at some point, from I5 in California to I95 in Florida.