What do the New Hampshire State Police patrol that is approximately 17029 miles in length?
New Hampshire Highway System The New Hampshire Highway System is the public roads system of the U.S. state of New Hampshire containing approximately 17029 mi maintained by the New Hampshire Department of Transportation (NHDOT). All public roads in the state are called "highways", thus there is no technical distinction between a "road" or a "highway" in New Hampshire.
Merrimack County, New Hampshire Merrimack County is a county in the U.S. state of New Hampshire. As of the 2010 census, the population was 146,445, making it the third-most populous county in New Hampshire. Its county seat is Concord, the state capital. The county was organized in 1823 from parts of Hillsborough and Rockingham counties, and is named for the Merrimack River.