World's Longest Highways-- Part 2

I-90, UNITED STATES--  4,991 K  Longest U.S. interstate.

PAN-AMERICAN HIGHWAY, 18 COUNTRIES--  47,958 K.  Prudhoe Bay, Alaska to Ushuawa, Argentina.

401 MacDONALD CARTIER FREEWAY, CANADA--  818 K.  Toronto and is the busiest highway in North America as well as one of the widest as well.

ROUTE 6, GAR HIGHWAY, UNITED STATES--  5,158 K.  Named for the the Civil War Union veterans association, the Grand Army of the Republic.  Goes through 14 states.

HIGHWAY 1, AUSTRALIA--  14,500 K.  Covers most every inhabited part of Australia.  More than one million travel some stretch of it every day.

--RoadDog