a center turn lane before reaching an at-grade intersection with CSX railroad tracks. Thereafter, the road returns to four-lane divided highway before a traffic light at US 41 in Schererville and passing under Norfolk Southern railroad tracks. After US 41, the original alignment of the Lincoln Highway leaves US 30 and continues along the same route as old State Road 330 (SR 330). US 30 begins to curve towards the southeast, still as a four-lane divided highway. The highway has a traffic light at SR 55, heading east as the roadway enters Merrillville, where the route becomes a six-lane divided highway and has an interchange at Interstate 65 (I-65). At Colorado Street in Merrillville, the road narrows back to a four-lane divided highway. After a traffic light at the southern terminus of SR 51 in Hobart, the original alignment of the Lincoln Highway rejoins US 30. The highway passes through a mix of farmland and residential properties on the way to Valparaiso, entering the city and passing through commercial properties. The highway has a traffic light at SR 2 at the western end of the concurrency of the two roads. From there, the road crosses railroad tracks, passes south of Valparaiso University, and has a traffic light at the eastern terminus of SR 130. After passing the traffic light at SR 130, the road has a full interchange with SR 49 and the eastern terminus of the SR 2 and US 30 concurrency. Continuing east, the road passes the Porter County Municipal Airport and proceeds east-southeast from Valparaiso, towards Plymouth. Valparaiso to Allen County After leaving the Valparaiso area, US 30 passes through rural farmland, with an intersection at US 421 northeast of Wanatah and an at-grade railroad crossing with the Chesapeake and Indiana Railroad. East of the railroad tracks is an intersection with SR 39 and a bridge across the Kankakee River. Then the route briefly swings slightly to the north of the old Lincoln Highway alignment to accommodate an interchange at US 35. US 30 runs along the north side of Plymouth, passing through an interchange with the northern terminus of SR 17 and near the Plymouth Municipal Airport. The route curves around the northeast side of the city, having a major interchange with US 31 before heading east-southeast towards Warsaw. At Bourbon, the highway has an interchange with SR 331. The road curves east before entering Warsaw