Complex sentence: Further north, SR 11 and US 129 are joined by U.S.19, the three routes climb over and descend the mountains, and continues north to the North Carolina state line, where SR 11 meets its northern terminus.
Split into simpler sentences: Further north, SR 11 and US 129 are joined by US 19. The three routes climb over and descend the mountains, and continues north to the North Carolina state line, where SR 11 meets its northern terminus.