In 1956, the United States celebrated the opening of its first interstate highway. Since then, the country has been connected from one end to the other with a matrix of highways and superhighways. This compelling book introduces readers to the engineering feat of building the superhighways that have allowed us to live more connected lives. Readers will learn about the fascinating challenges that engineers face when building superhighways over waterways and roads, underground, and with the latest safety features. A follow-up activity provides students with a road map and encourages them to write directions from one city to another.