The major entryway into Austin is I-35. Loop 1 (also known as MoPac) joins with I-35 on Austin's northern and southern outskirts, dispersing traffic to the west side of the city. U.S. 183 runs at a slight north-south diagonal through Austin. Although it doesn't serve any major cities, U.S. 183 does serve as a major thoroughfare through town, eventually meandering northward to western Oklahoma and southward toward the gulf. East-west Highway 71 and U.S. 290 connect Austin and Houston.