The term 'BIG ROAD' can be solved by the crossword solution of 'FREEWAY', which is a seven-letter word. A FREEWAY is a type of highway that has multiple lanes and is designed for high-speed traffic. It is usually divided by a median strip and has limited access points, meaning that vehicles can only enter or exit at designated points. Freeways are typically found in urban areas and are used to reduce congestion and improve traffic flow.