The approximate eastern border of the Piedmont is the Fall Line, where many of these rivers have waterfalls.
This was historically important as a good location for water mills, and it was the upper limit of navigability on these rivers.
[1] Central North Carolina has a temperate climate, with abundant precipitation year-round.
In addition, two major interstates are under construction in the western portion of the region Cities in each of the major metropolitan areas also have auxiliary routes Charlotte has: Raleigh has: Greensboro has: Amtrak runs passenger service through Central North Carolina.
The majority of North Carolina's population, and each of its five largest cities, is located in the Piedmont.