In this special series, The Age focuses on Melbourne’s western suburbs to see how life could improve in Australia’s fastest-growing region. See all 29 stories .

Trains on the Melton line will not be electrified until at least the 2030s, with commuters in some of Melbourne’s fastest-growing suburbs on the Wyndham Vale line destined to wait even longer for higher-capacity, metro-style trains.

The state government is even investigating running battery-powered trains to Wyndham Vale, on the line which runs through boom suburbs including Tarneit and Truganina, instead of delivering on the promised, but potentially more costly, electrification of the line.

The Andrews government pledged in the 2018 election campaign that it would electrify lines to Melton and Wyndham Vale, which both r

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