Complex sentence: I-69 extends from Indianapolis IN to the west end of the Windsor-Quebec City Corridor via Fort Wayne IN, Lansing, Flint, and Port Huron MI/Sarnia ON.
Split into simpler sentences: I-69 extends from Indianapolis IN to the west end of the Windsor-Quebec City Corridor. Intermediate points include Fort Wayne IN, Lansing, Flint, and Port Huron MI/Sarnia ON.