What's interesting is that it was possible 25 years ago to build a 3 litre/100km car. The Audi A2. https://en.m.wikipedia.org/wiki/Audi_A2
Now a modern SUV has at least double the weight and a worse wind resistance value and uses 6l/100km of fuel.
And while there are limits what physics will allow it seems it was possible to reduce fuel consumption and emissions by at least 50% 25 years ago. With modern computer simulations and technical progress over the last 25 years something like this should be at least possible? Yet it's difficult to buy a car like this today.
Somewhere something went really wrong.
I think it’s trivial to buy a better car than the Audi A2 nowadays. But not with an ICE.
So what went "wrong" is that people prefer powerful cars with plenty of space, comfort, and bells and whistles rather than "3l/100km"...
Except in extreme cases, obesity is not playing a major factor here.
It's more a question of being tall. I'd love to be able to drive sporty cars, but I generally just don't physically fit. I fit fine in an SUV. A regular sedan I can fit, but because of the length of my legs, I have to slide the seat back if I'm in the front, or ask the person in front to slide their seat forwards if I'm in the back. Obviously it doesn't work if someone else as tall as me is in the seat behind/ahead.
Also sedans are terrible for my posture because I have to slouch so that my head isn't hitting the roof. My lower back and neck hurt so bad after a long drive because of the forced slouching.
Fortunately I use public transportation for 99% of my needs and none of this is an issue usually.
Edit: if the above hypothesis is true, we would expect average car size to correlate with obesity after controlling for factors like proximity to a dense urban area. Could be true. If you gots data let's go
Edit: I’m not fat guys. I power lift 3 to 5 times per week and wear a size 36 in blue jeans. I’m no Tom Haviland (I can only dream) but I’m not some porky bastard either. Abs are still slightly visible although I don’t lift for aesthetics. I’m simply trying to hit 1750lbs combined on the big 3 before I turn 45.
https://en.wikipedia.org/wiki/Fourth_power_law
Maybe couple that with a requirement for a higher license tier with more liability to drive "light trucks," based on the licensing and taxation systems other countries use.
You are right that most trips don't need SUVs and pickups, but many families need large-ish, relatively powerful vehicles like the now dead station wagon. But it is uneconomical for car builders to make station wagons, so they don't. Instead everybody who can't fit into an economy car is pushed into an SUV or pickup by practical concerns.
On the other side, large and powerful luxury cars are also not economic for car makers to build, so instead car makers add luxury to large utility models. From there it's a trickle-down of cachet so owning a sedan or hatchback is insufficient for those who need or want to fit in with a higher economic class.
It is in your interest to buy and drive the biggest car you can afford, due to the presence of other large cars on the road.
See [1] 12 black swans to avoid, YouTube video from ER physician Dr. McGuff. First thirty seconds. Force equals mass x acceleration.
That's not how inversions work. If you're in a small car and get into a collision with a large truck, you're likely to die. But if you're in a truck and get into a collision with another large truck, you're still likely to die, because you still got hit by a truck. Meanwhile truck collisions are more likely given the same drivers because they have more surface area which provides less margin to avoid an impact.
I may wish it weren’t that way, but I’m playing the game.
You would think twice about gratuitously moving around a multi-ton behemoth if it actually hurt you economically.
This barely-an-issue is only ever brought up by people trying to naysay EVs. I've never once heard it mentioned before EVs became popular, despite heavy ICE cars being extremely common.
The problem there is that they're not actually correlated. A BMW M5 has a shorter stopping distance than a Mazda Miata even though it weighs almost twice as much.
Brakes are "sized" for the car they're in. Bigger cars have more powerful brakes.
It would be a major safety issue if heavier cars couldn't brake as quickly as safety required.
So no, smaller cars don't have any general advantage in being able to stop earlier and therefore avoid accidents.
There are far more cars on the roads now, and there are far more people who can simply afford to own a car that gets 20-30mpg instead of 50-70mpg.
I don't really know how we can "solve" this. The main route being taken at the moment is basically to try to reduce living standards, but to code it (e.g. "reduce car journeys") in such a way that everyone doesn't revolt.
Actually I found out there are use cases where an SUV is worse than a convertible or even a bicycle with a trailer. I once carried home a small tree from my kids bicycle trailer and was amused to see peopme struggling to put large plants inside their SUV without spilling dirt all over the trunk carpet. Those with a pickup truck fared a bit better yet still had a harder time than I did because their truck bed height. The only guy who was as comfortable as I was putting a large plant in his car was the guy who put the pot on the passenger seat of his convertible.
Limit the amount of parking required, sizes, etc. invest in transit and bike infrastructure.
Just make cars/drivers pay for the real costs on urban society for car storage.
Uhhh? So pay the tariff and get a $12,500 electric car? Still sounds like a pretty good deal plus the government gets some revenue. Where is the problem? Where is this “cannot” coming from?