Turnpikes

Rapid improvements in modes of transportation occurred during the late eighteenth and the nineteenth centuries. These innovations altered the structure of the United States demographically, causing some population centers to flourish, others to die, and still others to be born. Major cities, such as Baltimore and Philadelphia, competed to build more extensive and efficient transportation systems to the hinterlands so that they could become the dominate outlets for the goods of the rural areas. Small towns in the interior of Pennsylvania which became entangled in this transportation web, such as Carlisle, prospered as a result of this competition.