Usually , it implies a driver of an elegant passenger vehicle ( for example , a horse-drawn carriage , luxury sedan , motor coach , or especially a limousine ) . People who drive taxis , buses or non-passenger vehicles are generally referred to as `` drivers '' ( as in bus drivers and truck drivers ) . While the term may refer to anybody who drives for a living , it usually implies a driver of an elegant passenger vehicle such as a horse-drawn carriage , luxury sedan , motor coach , or especially a limousine ; those who operate buses or non-passenger vehicles are generally referred to as `` drivers '' .