Roads are called lanes, avenues, streets, etc., but how did the name causeway come about?

ArlingtonVA

"A causeway is a road or railway elevated on a sandbank, usually across a broad body of water or wetland.....When first used, the word appeared in a form such as “causey way” making clear its derivation from the earlier form “causey”. This word seems to have come from the same source by two different routes. It derives ultimately, from the Latin for heel, calx and as near certainly as may be, comes from the trampling technique for consolidating earthworks. In antiquity, the construction was trodden down, one layer at a time, often by slaves or a flock of sheep. " http://en.wikipedia.org/wiki/Causeway Jun 30 09, 9:10 PM