631C

631C is a short auxiliary state highway located in the Midwest United States, functioning as a spur of the primary State Route 631. The route extends for approximately 2.4 kilometers (1.5 miles) and provides a connector between the main highway and a residential‑commercial district on the northern outskirts of the city of Oakridge.

The highway is designated as a “C” suffix route, indicating its role as a minor branch rather than a primary thoroughfare. Its western terminus begins at an at‑grade intersection with State Route 631, where a signalized junction directs traffic onto 631C. From there, the roadway proceeds northeast as Oakridge Boulevard, passing a mix of single‑family homes, a small shopping center, and the Oakridge Community College campus. The eastern terminus ends at a T‑intersection with County Road 12, after which the pavement continues as a municipal street.

Constructed in the early 1990s, 631C was originally intended to alleviate congestion on adjacent streets and to provide direct access for the expanding college campus and nearby commercial development. The route was incorporated into the state highway system in 1994 and has since been maintained by the State Department of Transportation, which performs routine resurfacing and safety upgrades.

Traffic volumes on 631C are modest, averaging about 4,800 vehicles per day according to the most recent annual count. The road features two travel lanes, full‑width paved shoulders, and standard signage. No major bridges or tunnels are present along its length.

Since its inception, 631C has remained largely unchanged, serving as a localized connector that supports both commuter and institutional travel while integrating with the broader regional transportation network.