How many letters does the top answer for “bridge formed by the upper level of a crossing of two highways at different levels” have?

The most common answer is overpass (8 letters).

Crossword clue: bridge formed by the upper level of a crossing of two highways at different levels

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

overpass 8 letters wn-def

bridge formed by the upper level of a crossing of two highways at different levels