The schemes, which have a combined investment of CA$93m (£53m) involve repaving, repairing and replacing infrastructure such as roads, bridges, noise walls and signs.
The work is part of Ontario’s largest investment in public infrastructure in the province's history - about CA$160bn over 12 years.
Ontario has over 16,900 kilometres of provincial highway and 2,800 bridges.
Minister of transportation Steven Del Duca said: “We are committed to improving highway infrastructure across the province, while creating jobs and strengthening our economy. These projects are proof of our government’s commitment to provide modern infrastructure that will reduce commute times, create jobs and improve the quality of life for Ontarians.”