This is almost completely dry: not like in a water park.
You have slipped on a padded coat, and reinforced gloves. The tube is cooled from below, and has cooled lubricant running on its walls, well ventilated. You first grab the yellow, top cable, which gets you up to about 10 mph, then the successive other cables, until you are holding the lowest, most convenient high speed cable. (Top speed about 40 mph), point to point system, with Y junction for arrival distribution at endpoint.
Tumbling into others is avoided...
Should you get a cramp or heart attack and completely let go of the cable, you keep on sliding, but a slope causes you to slowly move into the lower channel on the right, see image below. The other riders can pass you on the left.
You won't hurt your hand at the cable wheel interface....
Prior to the point where the cables go into the tube wall, small brushes extending from the wall make hanging on to the cable difficult, and finally impossible before the cable port.
The cheapest and most elegant medium speed PRT system, even cheaper than vehicle based Hallitubes.
Cheap because it has few moving parts. A regular Hallitube route will have 4-900 carts, with 6-8 wheels each, and many parts will wear out. This system has only a few kevlar cables per tube, and a few wheels and motors, as well as coolant and lubricant pumps. Easy to maintain. Elegant because because unlike in a rail based system, mechanical switches are completely avoided. You neither need to slow down to exit, nor to operate a switch. Instead, you pick a new cable that carries you across a Y-Junction with a lot of spare space should you let go of the cable just then..
No, it is not as exhausting as it looks in the top picture...
Due to our limited budget we could not refine the images. The ceiling is much closer to you, and you won't have to reach up far. Any side of your body can be on the tube, and you can reposition yourself with ease. Briefly letting go of the cable is ok, as you keep on sliding, but there is a separation rule, and if you have let somebody come up close behind you, you must let them pass by briefly sliding away. (Etiquette, as there probably will be a very slight spray from your coat. )
Don't worry about the lubricant pump breaking...
There is a permanent lubricant tank for emergencies mounted on top of the tube. You yourself can actuate this tank, and it also comes on automatically if the pump or electricity should fail.
And if you want to get out...
You can open ports on the lower channel. But you need to slide up to the next pylon so you can get down to the ground. In areas with bigger pylon separation (near highway exits where the tube is held from the top by cables) there is a small footpath below the escape window, and you can climb from there on top of the tube, and walk up to the next pylon where you get down.
We need to urgently experiment with this, therefore funding for an Institute is a provision of the referendum.
