I don't think any kind of infrastructure will change any of this.
The fact is that people adore their cars too much, it's ingrained in part of the culture here. People need to be less reliant on their cars, then open themselves up to *gasp* walking to the bus stop, or *gasp* walking to the train station and then *gasp* walk from there to a bus stop, or their office building.
It seems that the majority find walking for in excess of 10 minutes is beyond their comprehension / level of acceptance. The attitude is clear when you look at the roads, you have people *screaming* at each other on the roads and racing toward stop signs/red lights/lines of traffic. Everyone is in a rush to get everywhere FAST.
The mindset needs to change, then the rest will follow.
Oh, but I guess this post is trying to be realistic... hmm

I really don't know what would aid people in making better choices for their health and community. Cycling, walking and public transport are all much more healthier and social means of getting to work/school/anywhere - I've rarely encountered any aggrevation from people using any of these forms of transportation. It's not the cars, though. They're inanimate objects.