In Quebec, the value of total public infrastructure stock amounted to $68.1 billion or 24% of the national total in 2007. The average age for the five public infrastructure assets has been lessening from its plateau value of 18.6 years at the turn of the millennium to 17.2 years in 2007. This recent reduction, fuelled largely by strong investments in roads, followed a period of steady ageing which started in 1974.
However, the average age of Quebec public infrastructure stock was still above the Canadian average in 2007. It ranked fourth, along with Newfoundland and Labrador, in terms of oldest public infrastructure after Nova Scotia, Manitoba and Saskatchewan. This above average ranking was attributable in parts to bridges and water supply systems which were among the oldest in the country. Quebec was the only province where the average age of each of the five assets was consistently above the national average.