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People can get sufficiently elderly and sick that an electric tricycle would be the best form of transportation for them. In car centric areas they are usually confined to their homes in these cases.

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What do you mean, those old people's motor rollers? I am not convinced.

There are bicycles with three wheels. There are also electric bicycles with three wheels. They require neither effort nor balance to ride, make a rather large part of the city accessible if proper infrastructure exists, and they have storage capacity, e.g. for groceries.

I don't see any elderly people using them. Nice thought, but I am not convinced.

How many elderly people do you see at all? If you think about it, you might realize there are several explanations other than "nobody uses those things"

I live in a big city, so I see a lot of elderly people. But especially the ones who are not mobile anymore you probably see less. If they were using those tricycle things, I would certainly see them at least some times.

My mother uses one.

So one out of several billion elderly people. Nice, but not really a proven concept.

My father used to be a doctor in a place that got converted into a pedestrians only area, he reported that a lot of people had issues. Business for other shops also declined.

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