Location: I-10 and SR-549, Dona Ana Cty 14 miles later, we’ll enter Dona Ana Cty and approach the eastern terminus of SR-549 Location: I-10 and SR-549, Dona Ana Cty Exit for 549, which heads back east to Deming along old US-70/80/180 E to US-70, W to I-10 Bus/US-180 W to I-10 Bus/US-180, E to I-10/US-180 W … Continue reading Interstate 10, NM-549 to NM-549