What roads is the dividing line for most of Kansas City metro area  south of the confluence of the river nicknamed the Kanza and the Missouri river?
State Line Road: State Line Road is a major north–south street in the Kansas City Metropolitan Area that runs along the Kansas–Missouri state line. State Line Road:  It is the dividing line between Kansas and Missouri for most of the Kansas City metro area south of the confluence of the Kansas and Missouri rivers. Cities along the road include Kansas City, Missouri, Kansas City, Kansas, and several smaller communities in Kansas such as Leawood, Mission Hills, Prairie Village, and Westwood Hills. Kansas River:  Its name (and nickname) come from the Kanza (Kaw) people who once inhabited the area.
State Line Road