Highway/Freeway - 6-8 lanes (both ways)
Roads/Blvd/Ave - 4 lanes (both ways)
Would probably takes 25-50 years to fix everything on the island of Montreal.
Also overhaul the metro system, like one person invisioned for 2100. If not that atleast a monorail system between the airport and the financial district.
Thats all I can think of for the transportation bit
It's true we need to expand our highways wider because even back in 50's/60's we had problems with congestion. Hopefully with doubling the lanes we might be able to cut down on congestion.
Also have the city of Montreal, Quebec and Canadian government help pay for doubling the bus and metro cars to run 24/7 and split waiting times in 1/2.