The state government will spend $13.7 billion on roads, railways and other infrastructure around Victoria in just 12 months in an unprecedented election-year building blitz.

Treasurer Tim Pallas will unveil the spending plans in Tuesday’s state budget, which will also show the state will be $1.4 billion in the black in the coming financial year, with massive average annual budget surpluses of $2.5 billion predicted for the next four years.

Mr Pallas says the record infrastructure spending in the 2018-2019 financial year is no one-off, with the budget papers to be published on Tuesday forecasting average annual spending of more than $10 billion for the next four years.

The Victorian government plans to spend a record $13.7 billion on infrastructure. Credit:Craig Abraham

The spending reflects the massive works program underway on roads, public transport and other projects as the government races to keep pace with Melbourne’s population boom and congestion headaches.