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Advancements in transportation have played a key role in the growth of our nation. U.S.government policies have also had a considerable impact on the development of transport as we know it today. In this series of three lessons,the students examine transportation and its impact on our nation (and vice versa) since the United States declared its independence in 1776. Lesson 1 focuses on improvements in transportation during the 19th century, particularly the development of a national rail system, to show how invention, innovation and infrastructure encouraged western expansion and economic growth. Lesson 2 moves on to the 20thcentury focusing on the development of auto transport and aviation. The impact on communities and world trade, for both good and bad,is examined. Lesson 3 calls upon the students to create a class time line of transportation milestones; the time line will help the students more clearly understand the factors, especially the economic incentives,that have played a key role in what has been called the 'Transportation Revolution.' While these three lessons will ideally be used together as a set, teachers may choose to use one or two of them, selectively, to focus, for example, on the 19th or the 20th century. If you would like your students to study the economics of transportation in more depth, consider following up with the EconEdLink lesson, An Economic Mystery: What Happened to Railroads?