Highway adjectives are listed in this post. Each word below can often be found in front of the noun highway in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing HIGHWAY.
american, ancient, beaten, big, broad, busy, central, certain, chief, coastal, commercial, common, concrete, crowded, dark
deserted, direct, distant, dusty, elevated, empty, famous, federal, first, free, good, grand, great, hard, imperial
important, improved, international, interstate, lane, large, local, lonely, long, lost, main, major, many, military, modern
more, narrow, national, natural, nearby, nearest, new, ocean, old, only, open, ordinary, other, own, paved
present, principal, public, regular, roman, rough, royal, rural, same, scenic, silent, single, smooth, south, southern
state, straight, such, transcontinental, traveled, very, watery, west, white, wide
Hope this word list had the adjective used with highway you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.