I don't think it's completely impossible in Canada, but for the US? Absolutely. I see the US as an insanely large organization that can't get anything done because it's too bloated. A very few people are fighting over power, and are so completely opposed ideologically that they disagree for the sake of disagreeing. Canada has the advantage of being mostly inhabiting a few areas of the country with any kind of density, so with some will, there could be a way.

Small changes are so rare that we somehow manage to celebrate then individually. A small town opens it's first mixed used building with bike/pedestrian area in San Francisco's suburbs and we open the champagne. One tiny part of a rail line opens in Montreal and we celebrate it like the second coming.

Meanwhile we aren't doing mass manifestations when a new lane is being added. We post about it on the internet and send one or two angry but polite emails. I am culpable of that too. No wonder things aren't changing. We should be much more loud, riot when someone gets killed by getting run into with a car.