3号美国国道（）是穿越马萨诸塞州和新罕布什尔州的一条南北方向的美国国道。全长277.90英里。
外部链接
- [http://www.bostonroads.com/roads/northwest/ US 3/Northwest Expressway on Bostonroads.com]
- [https://web.archive.org/web/20120707163744/http://granitehighways.com/?roadwayname=U.S.+Route+3+%2F+Daniel+Webster+Highway Photos of US 3 in New Hampshire]
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