sentences:  The last section of I-75 in Tennessee, approximately between SR 30 in Athens and US 321/SR 95 in Lenoir City, was opened to traffic on December 20, 1974, in a ceremony officiated by then-governor Winfield Dunn.The last section of I-40 and I-81 in Tennessee was opened on this same day.I-75 originally continued into downtown Knoxville then turned to the north at Malfunction Junction, following what is now signed as I-275.