The province’s road builders are rejecting a report that says the cost of roadwork is much lower in Quebec than in New Brunswick.

The report was produced two years ago for Quebec's auditor general and was recently submitted to an inquiry on corruption in the construction business.

A comparison of road construction costs shows the two provinces are roughly equal with New Brunswick coming in slightly cheaper.

But the report also lists figures for upgrades to existing roads and that section highlights a significant difference between Quebec and New Brunswick.

The report compared two projects in the summer of 2009: a five-kilometre stretch in Gaspe that cost $168,000 and a five-kilometre project in Campbellton that cost $374,000.

Ronald Losier, the vice-president at St. Isidore Asphalt, one of the province's biggest roadwork companies, said the discrepancy between the two projects could be a result of fluctuating asphalt prices.

He said the price of asphalt can vary by as much as 40 per cent.

Liberal MLA Denis Landry, a former transportation minister, said it is difficult to draw conclusions from a study that looked at just two five-kilometre road projects.

"There's all kinds of things that can happen. You can compare another project in Quebec and the difference would be cheaper in New Brunswick," he said.

Transportation Minister Claude Williams was not available to comment on the Quebec report.

Finance Minister Blaine Higgs released a $948-million capital budget last December, but the majority of those funds were to complete existing capital projects and the Route 1 highway project.

The Progressive Conservative government reduced spending for infrastructure projects to $24 million in 2012-13 in an attempt to cut the provincial deficit

The Charbonneau commission in Quebec is investigating corruption in the province’s construction industry.

The commission heard two witnesses last week who testified about a system of kickbacks and collusion in the awarding of city and provincial construction contracts.

Gilles Surprenant, a former senior city engineer, said last week he accepted $600,000 in bribes from construction companies over 10 years, in exchange for doling out contracts to certain companies and other favours.