Almost immediately afterward, US 221/SR 56 crosses the path; I-16 can be accessed approximately one-half mile (0.8 km) northeast of the intersection.

SR 86 travels through the city, on a former alignment of US 1/SR 4, before a four-lane bypass of the main part of Oak Park was built.

At Harrington Street, SR 86 departs from the former path of US 1/SR 4 and takes a more southerly turn toward its eastern terminus.

Finally, SR 86 meets its eastern terminus at an intersection with US 280/SR 30 halfway between Lyons and Reidsville.

[2][3] By the end of 1946, SR 46's portion just west of Oak Park was shifted to the southern part of the city, since it then had a concurrency with US 1/SR 4.

[21][22] The bridge carrying SR 86 over I-16, originally built in 1974,[23][24] was severely damaged when the raised bed of a dump truck collided with the structure on the morning of July 15, 2021.

[26] I-16 was fully reopened within the day of the incident; however the extended loss of the SR 86 bridge significantly increased commutes for people who rely on the road.