Quiet Zones
A designated 'quiet zone' is precisely what it says. Don't abuse your fellow passengers by engaging in mobile phone chats, or loud conversations in these zones. If someone else is doing the talking, politely point out the sign to them, prefacing your remark with a deprecating "I'm sure you haven't noticed the sign but . . .". If they still transgress, inform a member of staff, and wait for them to be removed.