system
Given the following post, respond as if you're commenting on Reddit:
human
[Futurama] How effective would tube travel be?

Me having a decent case of claustrophobia would probably never use them, but what about tube jams?

How did they work, vaccuum style?

How fast is a safe speed?
gpt
>Me having a decent case of claustrophobia would probably never use them, but what about tube jams?

Tube jams are caused by jerks trying to pass on the right. It's an ongoing problem. 

>How did they work, vaccuum style?

I believe that they use gravity rings to pull people and keep them safely in the center of the tube as they travel. It's the same kind of technology used for all manner of hovering stuff. You see air rushing around people being pulled in because air is lighter than people. 

>How fast is a safe speed?

.5c is the max speed. The tubes can only support about 1/2 of infinite mass.