Just drove through Sterling, and one of the unanticipated side effects of the Sterling S-Curve project is that CDOT appears to have signed CO 14 along US 6 to I-76. It was definitely signed to US 138, and there was a "EAST US 6 EAST CO 14" sign heading EB on the railroad bridge, but I'm not sure if there was any other signage (I just clinched 138 and didn't head out to the interstate).
I'll extend this route in the next couple days if nobody has any objections.