Good roads advocate Cyrus Avery of Tulsa is known as The Father of this numeric highway famous in song

It means royal road; California & Spain have them

For years DH marked this highway that despite its name wasn't only in the South--it got as far north as Detroit

The Sun Yat-sen Memorial Highway connects Feng-shan & Keelung on this island

Both St. John's on Newfoundland & Victoria in British Columbia have mile 0 markers for this highway