If you're gonna convince a car user of our views on urban development, you've gotta be in it for the long run. I find it extremely tedious and time-consuming to gradually nudge their perspective from unsustainable car centric planning to sustainable urban planning
And there needs to be an actual alternative to driving. You can't just make driving worse and expect results. I've found that even small positive changes in alternative methods of commuting can have disproportionately positive effect. For example at work we simply installed better and more bike racks and it seems that after a while we have maybe twice the number of people regularly cycling compared to before. Basically because cycling accommodations got nicer a few more people started cycling and then others saw that it is not only feasible but also enjoyable so they started cycling... If we could only fix few sections of the road leading to our facility... Once can dream.