Complex sentence: It turns more rural outside of Statesville and becomes entirely rural after exiting Iredell County, with only the town of Elkin serving as a possible rest stop in the area; the speed limit of entire stretch is 70 mph (110 km/h).
Split into simpler sentences: It turns more rural outside of Statesville and becomes entirely rural after exiting Iredell County. For the rest of I-77's stretch through North Carolina, the only possible rest stop is the town of Elkin; the speed limit through this area is 70 mph (110 km/h).