sentences:  Throughout its history I-75 has seen many reconstruction and widening projects in Tennessee.The first major reconstruction project was a widening of the concurrent segment of I-75 and I-40 from four to six lanes between the interchange near Lenoir City and Downtown Knoxville, which began in the late 1970s.In the latter 1980s, I-75/I-40 was widened from six to eight lanes between the Pellissippi Parkway and Papermill Road, and multiple interchanges along this segment were reconstructed.