Interstate 40 crosses the state in a west-east orientation. Its branch interstate highways include I-240 in Memphis; I-440 in Nashville; I-140 from Knoxville to Alcoa and I-640 in Knoxville. I-26, although technically an east-west interstate, runs from the North Carolina border below Johnson City to its terminus at Kingsport. I-24 is an east-west interstate that runs cross-state from Chattanooga to Clarksville. In a north-south orientation are highways I-55, I-65, I-75, and I-81. Interstate 65 crosses the state through Nashville, while Interstate 75 serves Chattanooga and Knoxville and Interstate 55 serves Memphis. <answer>Interstate 81</answer> enters the state at Bristol and terminates at its junction with I-40 near Dandridge. I-155 is a branch highway from I-55. The only spur highway of I-75 in Tennessee is I-275, which is in Knoxville. When completed, I-69 will travel through the western part of the state, from South Fulton to Memphis. A branch interstate, I-269 also exists from Millington to Collierville.
Which interstate ends at a junction close to Dandridge, Tennessee?
Interstate 81