MO: US 61 Point Concern

[Markkos1992]

US 61: I-55BLCam_N>-McNSt (already done on US 67)

Note that the US 61/US 67 line goes west of I-55 in a couple spots north of MO Z.  The southern shaping point is the only one that really concerns me (maybe fixed by a shaping point on I-55 at the curve north of 180); however, I am unsure if the two shaping points between there and the one south of MO M are even needed.