 By 1946, the two sections were combined, reaching its apex of nearly long.In 1948, SC 37 was truncated to US 78, in Elko; but in the following year, it was re-extended back to SC 39.In 1962 or 1963, SC 37 was truncated at its current southern terminus with SC 28, north of Barnwell; its former alignment south replaced by SC 3.