Complex sentence: Corridor H is part of the Appalachian Development Highway System and is also known as US 48 is an east-west United States highway that currently runs for 148 miles (238 km) from northern Virginia to central West Virginia.
Split into simpler sentences: Corridor H is part of the Appalachian Development Highway System and is also known as US 48. It is an east-west United States highway that runs 148 miles (238 km) from northern Virginia to central West Virginia.