On Thursday, New York officials called for greater courtesy on the city's crowded buses and trains. They've also warned that those who refuse to give up seats to the elderly and disabled could be fined.
"The fine is 50 dollars. It has been in the books for a long time, the difference is that this time, it is specified on the poster," a spokesman for the city's transport services said.
A poster campaign launched on the city's bustling buses and packed subway reminds all travellers: "Please offer a seat (it's not only polite, it's the law). Please be aware, not all disabilities are visible."
Earlier courtesy campaigns in 1999 and 2004 did not stress the terms of the Americans with Disabilities Act under which recalcitrant passengers may even face jail if the police have to be called in to intervene.