5 kmh bed rail system

A study published in the British Medical Journal and summarized in the attached links shows that the Grim Reaper really can't be bothered taking the lives of people traveling at 5 kmh. The researchers studied 1705 men aged 70 and noticed a definite correlation between Walking speed (m/s) and mortality.

The average walking speed of those 266 men that died was 0.88 metres per second - roughly 3.1km/h while ZERO of the men who walked at 5 kmh (3mph) died. The researchers drew the obvious conclusion, which jibes with empirical observation, that few people traveling at 5 kmh ever die. It also seems obvious that the curve turns upwards at speeds above this optimal rate as we all know that the faster people are traveling the more likely they are to die.

In short, the data shows that one is more likely to die either laying in bed or partaking in high speed activities than if you can just manage to keep moving at 5 kmh. This is easy to achieve when you are awake but sooner or later sleep, and death, catches up with us all.

My idea is to provide some sort of moving bed system to absolutely minimize one's chances of being nabbed by the reaper. While it may be possible to construct a wheeled and powered bed for the wealthy individual who has a large enough home and grounds to make this feasible, [MaxB?] I would suggest some sort of light rail system for the masses.

You will agree it is hard to imagine anyone dying whilst sleeping on a train moving at a sedate 5 kmh. Further research would need to be done, of course, because while we know the Grim Reaper is slow he may well be cunning enough to merely wait for you at your normal stop. A certain degree of randomization of routes and schedules may be necessary to keep him guessing. (Perhaps British Rail or any of the national train services are already eminently qualified to run this sort of train service?)

I don't think this system is infallible as people are ingenious in coming up with ways to collide with the Reaper, and he is ever patient, but I see no sense in just laying perfectly still with one's eyes closed to make it easy for him. And he isn't infallible either. So far 7 billion of us have managed to elude him.