好走 has two flavors. (1) As a parting phrase to a guest leaving your home — a polite 'take care.' (2) Literal:
路好走 means a road is easy/smooth to walk. The phrase
走好 (zǒuhǎo) is also a parting wish, and additionally a euphemism said at funerals — 'rest in peace, may your journey be safe.'
