The Transcontinental Highway refers to a network of roads that connect the eastern and western parts of a country, facilitating long-distance travel and trade. In the United States, the most famous example is the U.S. Route 66, which stretches from Chicago to Santa Monica, covering over 2,400 miles. This highway played a significant role in American history, especially during the Great Depression when many people migrated westward. The concept of a transcontinental highway is not limited to the U.S.; other countries have similar routes. For instance, the Pan-American Highway connects North and South America, spanning approximately 19,000 miles. These highways enhance economic growth, tourism, and cultural exchange by linking diverse regions.