A RAILWAY station at Williams Landing, being built at a cost of $110 million, will help fill a urgent need for better public transport in Melbourne's outer west.

When the station opens in April, it is predicted that up to 1000 passengers will use it each day in the morning peak, adding to swelling numbers on the crowded Werribee line.

But some of those commuters are wondering just how they will get to the station, even as they look forward to its opening.

Jammed local roads, infrequent and indirect bus services and inadequate parking mean reaching Williams Landing station will be complicated.

The zone two station is being built on the north side of the Princes Freeway. Just south of the freeway is Point Cook, population 32,500 and growing, and to the north is Truganina, home to 39,000. Closest to the station is the embryonic suburb of Williams Landing, which will one day have 2500 homes, but now has a population of 3000.

Point Cook resident Nick Michaelides plans to use the station. But he predicts that commuters will struggle to get there early enough to find a parking space. And he does not rate as an alternative two local bus services that run every 40 minutes in the peak.

''It's great that they're going to open a new train station, but they've only put in 500 car parks,'' says Mr Michaelides, a spokesman for the Point Cook Action Group.

He now drives to Laverton station to catch the train to work in the city, leaving home at 6.30am to nab a parking spot. Its car park usually fills shortly after 7am and many who arrive later park in their hundreds on a long, grassy strip along the railway line. When it rains, the strip turns to mud, Mr Michaelides says.

''In winter it's just a complete quagmire and I've seen cars bogged in there that can't get out.''

No bus passes Williams Landing station but Public Transport Victoria says it plans to extend a bus route to the area once the station opens, as well as reviewing Point Cook's buses.

Public Transport Victoria spokeswoman Andrea Duckworth says the station will feature a bus interchange.

But Western Metropolitan Greens MP Colleen Hartland says the bus services must be improved drastically or the car park will overflow.

''Unless there's a really frequent bus service, a 10-minute shuttle into the station, people are going to drive there,'' Ms Hartland says.

''It'll be exactly like when they opened South Morang station: the car park will fill up straight away and it won't necessarily be people at Williams Landing; it will be people from Point Cook who can't get to Hoppers Crossing or Laverton.''

An inquiry into the liveability of outer suburban Melbourne, tabled in State Parliament on Wednesday, found that ''planning for public transport infrastructure has been a particular blind spot. The effects of this 'blind spot' in Melbourne's land-use planning have been and continue to be felt most acutely in Melbourne's outer suburbs''.