How many train fares to Geelong can you get for a $5000 helicopter ride? More than 300 return trips, if you're travelling off peak. 

Malcolm Turnbull is well known for using public transport to get from A to B, and for letting the public know about it through social media. 

On Wednesday, the Communications Minister tweeted that he was on his way to Geelong to meet fellow Liberal MP Sarah Henderson and that he would be travelling from Melbourne by train. 

It was as subtle as a three-word slogan. 

Social media couldn't help but join the dots and compare Mr Turnbull's 80-kilometre commute with Speaker Bronwyn Bishop's now-infamous $5000 chopper ride to a Liberal Party fundraiser, also in Geelong. 

Ms Bishop paid back the money but is continuing to come under pressure for taxpayer-funded trips, including a flight to ex-Liberal MP Sophie Mirabella's wedding in Albury.

On Tuesday night he tweeted that he was "enjoying the pleasure" of the 96 tram, which travels between East Brunswick and St Kilda. 

When asked for proof, he posted photos of himself chatting to locals "about music journalism".

While Mr Turnbull wanted to appear at ease on the train and trams, it remains to be seen whether he will have a word to his Victorian colleagues about the state of the public transport system.

Mr Turnbull said he wasn't sold on the policy of free trams in the CBD, introduced this year.

And the tram Mr Turnbull was on also looked a bit cramped, with the minister sitting not on a seat but in the bendy bit where the carriages join.

Though he may not have made the direct link himself this time, Mr Turnbull hasn't been shy of joking about Ms Bishop's travel claims.