In 2005, Bergeron ran simultaneously for Mayor of Montreal and City Councillor for the district of DeLorimier, located in the Borough of Plateau-Mont-Royal, under the "Projet Montréal" label. As a Montreal city councilor, Bergeron asked the Quebec transport ministry and the City of Montreal to reconstruct the Turcot Interchange in such a way as to create an urban boulevard with a large capacity for high-quality public transportation. He asked the City of Montreal to preserve remaining green spaces, submitted proposals for improving the quality of snow removal in Montreal and demanded that future scandals be avoided by limiting donations to municipal political parties to $300 per person per year, by having the executive committee hold its meetings in public and by returning the supervision of its projects to the City of Montreal. On May 2, 2009, the Projet Montréal leader lodged a complaint with the Sûreté du Québec concerning the contract for water meters and the apparent link between it and the sale of the Contrecoeur site by the SHDM. He asked the police to investigate the role of certain elected officials, highly placed civil servants or directors of the current administration in these matters.