Victoria is Australia's forgotten state when it comes to federal infrastructure funding.

If Prime Minister Malcolm Turnbull wants to understand why he is losing traction in Australia's second most populous state, he could do worse than take a look at the carve-up of major projects funding.

Monash Freeway roadworks, Melbourne Credit:Angela Wylie

An analysis of data from the federal budget update shows Victoria has been severely short-changed, having been allocated an annual average of $507 million for major project over five years.

That's equivalent to $82 per person, less than one-third the national per capita average of $257.