Kansas Turnpike discontinuous exit numbers on I-70. The first of the highway, between its southern terminus at the Oklahoma border and Emporia, Kansas, are designated as Interstate 35 (I-35). The Kansas Turnpike is the only tolled section on this Interstate. The turnpike runs due north and south between its southern terminus and Wichita. This stretch of the highway runs parallel to U.S. Route 81 (US-81), which lies to the west of the turnpike. The Kansas Turnpike begins at the Oklahoma state line north of Braman, Oklahoma. This is also the point at which I-35 crosses from Kay County to Sumner County. The
Kansas Turnpike turnpike proceeds due north from the state line, with no interchanges for its first in Kansas. The southernmost interchange on the turnpike is Exit 4 (South Haven), which serves US-166. US-166 heads east to Arkansas City and west to US-81 at South Haven. This interchange is a four-ramp folded diamond with ramps in the southeast and northwest quadrants. It has no toll plazas, as it lies south of the southern barrier toll. Northbound traffic must exit at US-166 to avoid paying a toll. Initially, the interchange provided only a southbound exit and northbound entrance, forcing drivers who did not wish