Aquinas' definition. The Oxford Concise Dictionary of the Christian Church defines acedia (or accidie) as a state of restlessness and inability either to work or to pray. Some see it as the precursor to slothâone of the seven deadly sins.
A train horn is a powerful air horn that serves as an audible warning device on electric and Diesel locomotives. The horn's primary purpose is to alert persons and animals to an oncoming train, especially when approaching a grade crossing. The horn is also used for acknowledging signals given by railroad employees, such as during switching operations.
For Safetyâs Sake: Why We Sound Train Horns. The sounding of train horns for grade crossings, station platforms and along Metro-Northâs right of way is a critical safety measure to alert customers, railroad workers and area residents of an approaching train. Metro-North is committed to the safety of our customers and employees at all times.