20号美国国道

20号美国国道（）是一条东西方向的美国国道。该公路连接了俄勒冈州纽波特和马萨诸塞州波士顿，全长3,365英里。

外部链接

• [https://web.archive.org/web/20120525132619/http://www.galena-bypass.com/ Galena Bypass project homepage]
• [https://web.archive.org/web/20131207061319/http://highwayexplorer.com/il_EndsPage.php?id=2020§ion=1 Illinois Highway Ends: US 20]
• [https://web.archive.org/web/20140719144004/http://highwayexplorer.com/EndsPage.php?id=2020§ion=1 Indiana Highway Ends: US 20]
• [https://web.archive.org/web/20111011221825/http://lincolnhighwayoh.com/twenty.html In Search of...U.S. Route 20 in Ohio] by Michael G. Buettner, February 2006
• [http://www.empirestateroads.com/travel/us20/ US 20 Travelogue in New York] at Empire State Roads
• [https://web.archive.org/web/20071102210142/http://travel2.nytimes.com/2006/08/11/travel/escapes/11road.html "On Route 20, Where the Past Is Present"]: August 11, 2006, article in The New York Times Escapes section.
• [http://www.flickr.com/groups/us-20/ Flickr Group] for photos taken along US 20
• [https://web.archive.org/web/20141230005231/http://usends.com/20-29/020/020.html US 20] as USends.com
• [https://web.archive.org/web/20160106124453/http://www.sunypress.edu/p-4617-twenty-west.aspx Twenty West: The Great Road Across America]—book about US 20
• [http://www.historicus20.com/ Historic US Route 20 Association] Site dedicated to the preservation and promotion of Historic US Route 20