What is the length of US 400?
Q: What is the length of US 400?
A: US 400 is 481.306 miles (774.587 km) long.
Q: When was US 400 created?
A: US 400 was created in 1994.
Q: Where does US 400 begin and end?
A: The highway's western endpoint is in Granada, Colorado, at an intersection with US 385, and its eastern endpoint is southwest of Joplin, Missouri, near Loma Linda, at an interchange with Interstate 44.
Q: Did the route always have its current endpoints?
A: No, originally it ended in Garden City, Kansas; but in 1996 it was made longer to its current western endpoint.
Q: Does the route number follow the usual AASHTO numbering scheme?
A: No, there is no "parent" US 0 so it does not follow the usual AASHTO numbering scheme.
