The document discusses transportation and trade development in early 1800s America. It describes how private turnpike companies first built roads, and then Congress approved construction of the National Road to connect the east and west. It also discusses the advantages of river travel via steamboats, but rivers did not connect all regions, so a canal was built to link the Hudson River to Lake Erie (the Erie Canal). The canal opened in 1825 and greatly expanded trade by lowering shipping costs. Canals and roads helped America grow its economy in the early 19th century by facilitating transportation of goods and people.