 Beyond this intersection, SR 156 crosses a mile-long causeway across Nickajack Lake, with the Nickajack Cove inlet to the south, and the main body of the lake to the north.The road runs parallel to a stretch of CSX railroad tracks along the length of the causeway.After reaching the main lakeshore, SR 156 turns northeastward, following the shore and the lower slopes of Sand Mountain before reaching an intersection with Interstate 24 (Exit 161).