Complex sentence: The highway across the state from St. Croix Falls to Armstrong Creek was numbered WIS 14 at that time; the remainder of what is now US 8 was unnumbered secondary highways and WIS 14 ran north of Armstrong Creek to Florence.
Split into simpler sentences: The highway across the state from St. Croix Falls to Armstrong Creek was numbered WIS 14 at that time. The remainder of what is now US 8 was unnumbered secondary highways, and WIS 14 continued north of Armstrong Creek to Florence.