State Route 315, known locally as the Olentangy Freeway, running almost parallel to Olentangy River Road for most of its length,^[3] is a north–south highway in central Ohio, in the Columbus metropolitan area. It may be seen abbreviated as SR 315, OH-315, or simply 315. Its southern terminus is at the south junction of I-70 and I-71 in Columbus, and its northern terminus is at US 23 near Delaware. It is a controlled access freeway from its southern terminus to I-270. The controlled access section carries two or three lanes in each direction, depending on the location. North of I-270, it becomes a two-lane road. It roughly follows the Olentangy River for about two-thirds of its length. The route passes through Ohio State University campus. The section between Interstate 670 and Interstate 70 is known as the West Innerbelt, and it is commonly referred to as such in traffic reports. The original name of this section was Sandusky Street.

Quick Facts State Route 315, Route information ...

State Route 315
Route information
Maintained by ODOT
Length	22.48 mi[1] (36.18 km)
Existed	1933[2]–present
Major junctions
South end	I-70 / I-71 in Columbus
Major intersections	I-670 in Columbus I-270 in Worthington
North end	US 23 near Delaware
Location
Country	United States
State	Ohio
Counties	Franklin, Delaware
Highway system
Ohio State Highway System Interstate US State Scenic
← SR 314 → SR 316

Close

An unsigned State Route 315C exists which begins on the Interstate 670 westbound ramp to Neil Avenue, follows Neil south to the Goodale-Neil Connector and Goodale Avenue, then up Olentangy River Road and onto the ramp to State Route 315 southbound, where it ends. It is clear from the Straight Line Diagram that SR 315C exists westbound only.^[7]