This document discusses the key elements of highway engineering and road cross-sections. It defines elements such as the carriageway, formation width, right of way, shoulders, side slopes, berms, boundary stones, side drains, building lines, control lines, spoil banks, borrow pits, and kerbs. The carriageway is the paved area for vehicles, and formation width is the top width of the highway embankment excluding side drains. Right of way is the acquired land along the road alignment, and shoulders provide an emergency lane. Side slopes involve the angles of cuts and fills, while berms and boundary stones define edges. Drains remove rainwater, and setback lines control construction. Spoil banks and