South Dakota State Route 46 is a east-west highway. This runs along the Union-Lincoln County Line. SD St Rt 46 passes through the following town in Union-Lincoln Counties. Beresford SD St Rt 46 is not multi-plexed in Union-Lincoln Counties. SD St Rt 46 intersects the following highways in Union-Lincoln Counties. Interstate 29, near Beresford. South Dakota State Route 11, near Alcester.