Complex sentence: Grading continues south of both Tennessee and Colchester another overpass of te BNSF Railroad is required as the route turns north to bypass northwest of Macomb (WIU side of city).
Split into simpler sentences: Grading continues south of both Tennessee and Colchester. Another highway overpass of BNSF Railroad is required as the route turns north to bypass northwest of Macomb (WIU side of city).