sentences:  From that interchange, I-69 continues south, merged with I-55 for approximately , crossing the Mississippi state line.The Mississippi Department of Transportation has been working on widening I-55/I-69 between Hernando and the Tennessee State Line, adding travel lanes in each direction, reconstructing bridges, and improving traffic flow at interchanges.Meanwhile, TDOT is reconstructing I-55 and I-240 from the Mississippi line to Memphis.