What is etiquette in transportation?A woman who smokes in a crowded bus and pollutes the air everyone must breathe, a man who insists upon carrying a cumbersome package in a rush-hour subway and keeps clobbering his fellow passengers over the head - these people are not evil; they are simply thoughtless, oblivious of the discomfort and inconvenience they cause others.Quite simply, it is consideration for the comforts and convenience of passengers.