SR 312 eastern terminus is at an interchange with US 12 and SR 912. Chicago Avenue continues east of US 12 and SR 912 as a short street, passing through more industrial properties before dead-ending at a railroad.
SR 312's eastern endpoint is situated at an intersection with US 12 and SR 912. Chicago Avenue proceeds east from US 12 and SR 912 as a short road, traversing more industrial areas before terminating at a railway line.