Nowadays, if we hear the word "holy" outside church, it’s usually in the expression “holier than thou.” The phrase is reserved for pompous religious know-it-alls who think they’re better at Christianity than everyone else. The title fits individuals who desperately need to re-read what the Bible says about humility.
The son of a truck driver, I like highways and image of travel. Checking The New Interpreter’s Bible Dictionary's entry about roads and highways, I learned that a messila was a built-up road, intentionally constructed and improved, while a derekh (Num. 20:17, 19, Judg. 21:19) was a path was formed because of constant use and thus had become a road.