[toomanybeersies]

Aeroplanes are probably a more accurate approximation of what you'd feel. You get hardly any G force from banked highways, your speed is just too low. Now I don't really get plane sick, I will quite happily sit through a few barrel rolls (which is far more extreme than the hyperloop (although that would be fun)), but there's plenty of people who would get sick from a few 1.5 G banked turns.

Elevators are different because you don't spend more than about 1 minute in an elevator.

[Retric]

High end cars can pull up to 1g lateral forces and many cars can pull up to 1g breaking on a good road surface. Relatively low top speed just means you don't accelerate very long. I have hit weightlessness over a hill at high speeds followed by 1.x g on the other side, so 0.5 g does not seem bad.

Remember 1g * 1 second is only ~22mph.

[toomanybeersies]

For sure, my car is a pile of junk and can hit 1g braking.

The problem is when it's sustained. That's why people get sick on roller coasters and when doing aerobatics (extreme examples, I know).