Indiana State Route 18 runs east-west across Southern White County. This connects Brookston to Interstate 65 and to Lake Freeman. IN St Rt 18 passes through the following town in White County. Brookston IN St Rt 18 is not multi-plexed in White County. IN St Rt 18 intersects the following highway in White County. U.S. Rt. 231, near Roundgrove.