sentences:  The 40th parallel became the primary baseline for surveying the land in the eastern portion of the new territory, and a road was eventually cut along the survey baseline.The road along the 40th parallel is officially named Baseline Road in Boulder County and the City and County of Broomfield, 168th Avenue in Adams County, and County Line Road or Weld County Road 2 in Weld County.A stretch of Baseline Road, from US 287 in Lafayette to I-25 in Broomfield, is part of State Highway 7.