> Tower of Terror holds the record for most G-force on any roller coaster in the world, an intense 6.3G. This is nearly twice the amount that the average astronaut experiences when making their way through the atmosphere.

So world record for a roller coaster was ~60 m/s2, and that was presumably for a very short duration.

On a transit system you don't want roller coaster style restraint systems so g-forces have to be much much lower.

Some people might be into "ride a roller coaster from NYC to Boston" but that sounds like a niche market to me.

http://rollercoaster.wikia.com/wiki/Highest_G-Force_on_a_Rol...