In his election campaign, Ontario Premier Doug Ford said he's committed to building a 31-mile-long (50km) tunnel under Highway 401. Costing as much as $55–$60 billion, according to some estimates, the shockingly high price is more than double the cost of Canada’s most expensive megaproject.

In the midst of a construction boom, federal and provincial governments are spending billions of dollars on transit, sewers and other infrastructure. Read on to discover 15 of the biggest megaprojects currently under construction across Canada, ranked from least to most expensive, and find out when they’ll be ready.

All dollar amounts in Canadian dollars unless indicated.