Interstate 10
mi km
CA 242.54 390.33
AZ 392.33 631.39
NM 164.27 264.37
TX 881.00 1,417.83
LA 274.42 441.64
MS 77.19 124.23
AL 66.31 106.72
FL 362.26 583.00
Total 2,460.34 3,959.53
Route description
Interstate 10 (I-10) is the southernmost cross-country highway in the American Interstate Highway System. I-10 is the fourth-longest Interstate in the United States at , following I-90, I-80, and I-40. This freeway is part of the originally planned network that was laid out in 1956, and its last section was completed in 1990. I-10 stretches from the Pacific Ocean at State Route 1 (Pacific Coast Highway) in Santa Monica, California, to I-95 in Jacksonville, Florida. Major cities connected by I-10 include (from west to east) Los Angeles, Phoenix, Tucson, El Paso, San Antonio, Houston, Baton Rouge, New Orleans, Mobile, Tallahassee, and Jacksonville. About one-third of its length is within the state of Texas, where the freeway spans the state at its widest breadth.