Farm to Market Road 1171
Farm to Market Road 1171 (FM 1171) is a farm to market road in Denton County, Texas. Route description FM 1171 begins at I-35W in Northlake. In Flower Mound, the road is known as Cross Timbers Road, and it has a junction with US 377. It serves as a major arterial for eastern Flower Mound and Lewisville, where it is known as that city's Main Street. FM 1171 continues through central Lewisville before the designation ends at I-35E; Main Street continues into eastern Lewisville as a four-lane road, which was formerly part of the 1171 designation but was later removed. History FM 1171 was first designated on March 30, 1949 from proposed US 77 west to a county road; at that time, the Lewisville area was undeveloped, and current alignment of US 77 (now superseded by the Interstate 35E freeway) had yet to be constructed. On June 30, 1955, Loop 187 was combined with the route, extending it eastward to the original route of SH 121 through eastern Lewisville. FM 1171 was extended westward through Lewisville to US 377 on June 28, 1963, and then to the Interstate 35W freeway on November 5, 1971. A spur route of FM 1171