What is the longest US route?
It depends on how you count. Based on the 1989 US route log US 6 is the longest US route without a major break in mileage, currently at 3,205 miles. US 20 has the longest number of mainline miles, with 3,237 miles, but it has a break in mileage through Yellowstone National Park. If you count all Alternate, Bypass, and Business type routes, US 20 is the current winner at 3,365 miles. Historically, US 6 was the longest route at its fullest extent, at 3,517 miles. 2000-02-09 00:03:03 7.6.2 Q: What is the shortest US route? A: Currently US 266 and US 730 are each 42 miles long. Historically, US 630 was two miles long. 2000-02-09 00:04:09 7.6.3 Q: What are the current remaining single-state US routes? A: US 46 (NJ), US 57 (TX), US 92 (FL), US 96 (TX), US 117 (NC), US 130 (NJ), US 158 (NC), US 171 (LA), US 175 (TX), US 181 (TX), US 192 (FL), US 201 (ME), US 211 (VA), US 264 (NC), US 266 (OK), US 290 (TX), US 311 (NC), US 341 (GA), US 350 (CO) Jan 27, 2005 7.6.4 Q: Why do US routes in the sou
