"Shhh, " she finally replied, apparently having decided that I couldn't have said what she thought she'd heard me say.

CNN: AllPolitics - TIME This Week

Best-known on Amtrak, the shhh-cars are an option on local train lines in places including New York, Pennsylvania, Virginia, Illinois and California.

WSJ: Shhh! 'Quiet Cars' Turn Commuters Into Librarians