high road

noun2

1. •
   (UK) A main road or highway.

   • On Wednesday, the 27th, we arrived at a place called Tʻien-chin. Here we were not on the high road to Pekin, hence the excitement created by our arrival was greater than I had ever before witnessed. — 1878
2. •
   A course of action which is dignified, honourable, or respectable.

   • The high road of public service and the low road of political advantage seem inextricably intertwined. — 1982