The redevelopment project was initially announced 12 years ago, on May 2, 2005, with a proposed price tag of $150 million — $17 million for the overpasses alone.
By September 2006, the cost was revised to $180 million, before jumping again to $190 million less than a year later.
READ MORE: Dorval overpass stalled by legal dispute
On Feb. 16, 2009, the projected costs reached $224 million, with construction starting that April.
WATCH BELOW: Dorval overpass opens
In July 2010, a revised budget pushed the price to $343 million.
READ MORE: Costs mount as Dorval Interchange sits idle
Almost one year later, a KPMG report estimated the cost to build the overpass would now reach $500 million.
The project was then downsized back to $343 million, resolved the legal disputes and resumed work on May 2, 2016.
READ MORE: Dorval overpasses going nowhere fast
On Nov. 30, the first overpass finally opened, with the second now following a month later.
The new target date to finish the entire project, excluding the Dorval Circle, is 2019 — 14 years later than the original estimate.