Since Patco has no onboard conductors, its quiet-car policing is entirely up to the passengers.

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

The mayor's office said there were no plans for night-time conductors.

BBC: London night buses see '50% crime rise'

There have been no reports or observations of externalized conductors in these newer Optim-insulated leads, out of over 65, 000 of these leads sold worldwide since 2008.

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Like badges worn by New York City Transit employees, identification for LIRR conductors will continue to share serial numbers, but no names.

WSJ: A Ride Home, Anonymously