Top 10 Longest Highways in the United States

US Route 2:US Route 2 is the eighth longest highway in the United States at 2580 miles long. This highway is divided into two parts as it dips out of the United States into Canada and then re-enters the US.

Interstate 90:Interstate 90 (I-90) is the third longest highway in the United States at 3102 miles long. It is also the longest interstate in the nation. It begins in Boston, Massachusetts, and ends in Seattle, Washington.

US Route 60:US Route 60 is the seventh longest highway in the United States at 2670 miles long. It runs from Virginia Beach in Virginia to Quartzsite, Arizona.

US Route 50:US Route 50 is the fifth longest highway in the United States at 3011 miles long. This highway begins in Ocean City, Maryland, and ends in West Sacramento, California.

US Route 30:US Route 30 is the fourth longest highway in the United States at 3073 miles long. It begins in Atlantic City, New Jersey, and terminates in Astoria, Oregon.

US Route 20:US Route 20 is the longest highway in the United States at 3365 miles. It starts in Boston, Massachusetts, and ends in Newport, Oregon.

US Route 12:US Route 12 is the tenth longest highway in the United States at 2483 miles long. It begins in Detroit, Michigan, and ends in Aberdeen, Washington.

US Route 6:US Route 6 is the second longest highway in the United States at 3207 miles long. It starts in Provincetown, Massachusetts, and runs to Bishop, California. 

Interstate 80:Interstate 80 (I-80) is the sixth longest highway in the United States at 2899 miles long. I-80 is also the second longest interstate in the nation.

 Interstate 40:Interstate 40 (I-40) is the ninth longest highway in the United States at 2555 miles long. I-40 begins in Wilmington, North Carolina, and terminates in Barstow, California.

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