The WA Government is under pressure from one of its own backbenchers to improve public transport links to the Ellenbrook corridor, in the aftermath of its decision to abandon plans for a train line.

Swan Hills MP Frank Alban has urged Transport Minister Dean Nalder to look at a bus rapid transit system from Ellenbrook to the nearest train station in Bassendean.

Mr Alban's comments came as Mr Nalder maintained there was no need for a rail link to Ellenbrook for more than a decade, despite the Liberals promising that before the 2008 election.

The Government scrapped that plan after it was elected, saying forecast passenger demand did not warrant the construction of a rail line.

But an Ellenbrook rail line is a part of Labor's Metronet policy and the proposal will form a key plank of its campaign to win the seat of Swan Hills at next year's election.

Swan Hills is held by Mr Alban by a margin of 3.7 per cent and is a seat Labor almost certainly needs to win to oust the Barnett Government at the next election.

Bus link some security against Labor election: Alban

Mr Alban said a rapid bus link from Ellenbrook to Bassendean, as well as the widening of Lord Street in the longer term, would be "some security against the possibility of a Labor election".

"What the wider Ellenbrook community would appreciate is the reconsideration of a bus rapid transit system to Bassendean to provide a more efficient transfer to our rail system," Mr Alban told Parliament.

"This will enable the community to take full advantage of all the good work undertaken by this Government, both in the areas of road infrastructure and the healthcare of the new Midland public hospital."

In response, Mr Nalder said the Government was already investing heavily in transport links to Ellenbrook and was continuing to look at further options.

"A contract has recently been awarded for the $281 million project to replace signalised intersections on Tonkin Highway ... and a separate contract will be awarded later this year to construct the Reid Highway to Ellenbrook section of North Link WA," Mr Nalder told Parliament.

"My Department continues to investigate various options for the people of the Swan Hills and Ellenbrook areas, which includes Lord Street and improved bus travel times.

"Public transport patronage forecasts for the Swan urban growth corridor through to Ellenbrook do not demonstrate sufficient demand to justify the provision of a train line, heavy or light, in the near future.

"The Government has been clear that the most efficient public transport for this corridor will remain buses for at least the next decade."