Its funny actually you raise that point mac, in that we have the issue here, and have done for some time, where 4x4's and the urban type troop carriers have become much higher in demand, ie. Ford Territory type vehicles, because of the same reasons you mentioned about feeling safer whilst driving in traffic. They splashed all over the place that they are more dangerous in essence, but when I read about the research, they are more dangerous, but not to the driver of them, to the person they hit. So I guess why people buy them is warranted by protecting yourself and your family. They annoy me, because you can't see past them and have clear view of what is going on... but that won't change anytime soon.
Nothing is going to change immediately with the way people do things, and the main reason for that is because of cost. For a person to go out, sell their car and buy a more environmentally friendly one, just isn't going to happen unless the car needs to be replaced, because people don't have endless amounts of money to change immediately.
I look at the issue here in Australia with water, and we are running out very fast because of little rain, where if every household changed their washing machine from top loaders to front loaders, much of the water issue would be solved, however; to do that a family would be out of pocket about $1000, if not more, as the top loader would obviously have no resale value and would only be scrapped for recycling. A top loader washing machine, depending on size obviously, uses 150 - 250 litres of water per wash, where a front loader uses 30 - 50 litres per wash, and is better on the clothes themselves, ie. gentler, which means clothes would actually last longer being washed in that type of machine. Is the Australia going to change that immediately? No. We have made our house water saving friendly, but it cost us a few thousand to do it, and many families just don't have that money to go and do those things, regardless how much they want to do their part, money is the restriction. Damned if we do, damned if we don't...