But once Transport for NSW introduced “U-stops”, it appears almost nothing has been done to actually enforce them.

A U-stop is a stop at a station where passengers are only allowed to get on and not off the train.

The stops exist on two afternoon South Coast services, the 3.24pm and 3.54pm from Central.

All suburban stops between Central and Helensburgh on those trains are pick-up only services.

Anyone getting off at those stops risks a $100 fine.

The idea is to discourage Sydney commuters travelling to those stations from using services dedicated to the South Coast.

Yet it appears not one single person has been fined since they were introduced almost two years ago.

They were introduced in October 2016 and, after a year, a Transport for NSW spokesman admitted to the Mercury that no fines had been issued.

This week the Mercury again asked whether anyone had been fined.

While a Transport for NSW spokesman did mention the existence of the $100 on-the-spot fine, he did not answer the question of whether anyone had been fined.

Which strongly suggests that no one has.

The spokesman said efforts were made at Central to discourage Sydney commuters from using South Coast services.

“Stop indicator displays on the platforms and the automatic public address announcements do not include the suburban stations as stops,” the spokesman said.

“Therefore the first stop to be announced on platforms for these two services is Helensburgh.”