Highways and roads, the most important asset in the province, accounted for 58% of total public infrastructure stock in 2007. Roads were on a steady ageing trend in the province from the early 1970s to the late 1990s. Thereafter, increased investments and the discarding of some older investments from the gross stock base caused the average age of roads to drop by almost two full years from 18.6 years in 2000 to 16.7 years in 2007.
As a percentage of estimated useful life, Saskatchewan has been above the national average since 1993. It had been below the national average for most of the preceding 25 years. In 2007, highways and roads in the province had passed 59% of their estimated life, compared to the national average of 53%, the second largest gap among all provinces.