View from Europe: The Increasingly Convincing Case for Canada Joining the EU
(www.policymagazine.ca)
Everything is car centric, and if you're not rich enough to own a car, you're basically excluded from public life
Amsterdam changed.

Seriously, visiting North America is โweโve tried adding a [car] lane to the highway and canโt figure out why nobody is cycling or taking transit.โ
Transportation networks indeed make little sense when thereโs an ocean in between. Too bad the USA canโt play nicely with others.
Common standards would be a challenge, in some areas -canโt do electrical because 50hz vs 60hz and deep integration with USA grid. The NEMA plugs are a bit of a nightmare. But for vehicle safety and emissions it would be a step forward; more countries adopted the EU than US standards there.