Motorists who park in railway station car parks but who do not catch a train could face fines next year.

Authorised transport officers will begin patrolling station car parks in the new year, and will check myki cards to make sure the drivers are genuine commuters.

Those caught parking, but not catching a train, will be fined $89. Credit:Pat Scala

The punitive approach to tackling Melbourne's chronic shortage of railway station car parking will be trialled at six stations, before potentially being introduced more widely.

Non-commuters caught parking at the stations will be slugged with an $89 fine.