Hatches with ladders down to the ground? Great way to increase cost and diminish reliability exponentially. Let's put a failure point every [n] meters. Notwith

Hatches with ladders down to the ground? Great way to increase cost and diminish reliability exponentially. Let's put a failure point every [n] meters. Notwithstanding, this is a distraction from the biggest problem, which is that a decompression of one vehicle will require recompression of the entire segment of the hyperloop, stopping all vehicles in the segment. At the ambient near-vacuum pressure inside the hyperloop, humans cannot survive for more than a few seconds even with supplemental pressurized oxygen masks. There is absolutely no way to deal with the decompression of a single vehicle other than (a) recompress the loop or (b) plan for the occupants to be dead by the next stop. The problem is not even decompression itself. Any failure of a sensor or failure of communication with the vehicle for more than about 1s must be interpreted as a decompression, with shutdown of the loop, because to do otherwise is to plan for the death of the occupants. Commercial travel at very low ambient pressures has significant caveats. A plan to deal with these is going to be central to wide acceptance of the system. This is the greatest design challenge of the hyperloop.