U.S. Route 66 in Kansas new Interstate highway crossed directly from Oklahoma to Missouri, bypassing Kansas entirely. US-69 Alternate was formed in 1985 when US-66 was decommissioned; the remainder of US-66 in Kansas became K-66. The final (1985) alignment of US-66 therefore perfectly matches present US-69 Alternate and K-66. Coming from the west, US 66 entered Kansas from Oklahoma, concurrent with US-69 Alternate, also called Military Avenue. From the state line, the highway ran north through Baxter Springs. At the intersection of US-66 with West 30th Street, the highway originally traveled east onto West 30th Street and then north onto Roberts Road to get back
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