Robotics and weather don’t tend to mix well. You can do it obviously, but it introduces a lot more failure points.
You also need to deal with support placement, blocking people’s view, and NIMBYs, where as small cut and cover tunnels arn’t that much more expensive than any other sewer tunnel.
You need delicate sensors to detect where every vehicle is, to check for fallen branches, that confirm that your switch points actually moved, to communicate with each vehicle, and a thousand other things. All of this needs to work in heavy wind, rain, snow and ice. All of your delicate electronics need to handle massive shifts in temperature, and the resulting expantion and contraction is indeed the primary cause of failed electronics. All of this is exposed to all of the above day in day out for decades.
You can do it, indeed many automated metros and such do exist above ground, but it does significantly add to the cost of everything while dramatically reducing lifespan.
You can’t just put it in the middle of the road becuse you need to support it, and if supports are near cars than they need to be very big cast concrete structures in order to survive the inevitable crashes. You can build big supports and massive beams across the roads to support the track, but all of this adds about as much cost as just trenching it in the first place. There is a reason we don’t put our water mains above our streets.
People do very much care about what gets put above their skyline, and such a system would only really be practical if you were to expand it to residential and commercial areas, after all the primary point of the system is delivery speed, and nearly all industrial goods don’t need same month delivery, much less same hour.
Finally, the ground already often looks like swiss cheese in many cities, it’s just earth is good at spreading out loads and it’s very easy to carry the weight of that earth and the stuff above it with a few inches of concrete. Again, we run large water and sewer lines all over the place.
While this system is unlikely to be practical, Chicago had a similar idea over a hundred years ago after all and abandoned it in favor of trucks for a reason, putting it on stilts over everyone’s heads is not liable to make it more practical.
If it is on the surface it needs to mix with humans. safety becomes a hard problem. run underground and your safety becomes the simple there is nobody there - if there was the power would have been cut and so the vehicles can’t move.
Insurance cannot bring a dead person back to life. It can give the heirs money, but that is not the same. On the surface humans will need to cross the roads and we don’t know how to do that safely. In tunnels humans will never need to cross these vehicles and thus it is much easier to not kill someone.
You can get insurance to cover whatever you want. Normally it isn’t cost effective to get insurance for small losses from a minor accident, but you can get it if you really want (you will need to see a specialty provider)
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Robotics and weather don’t tend to mix well. You can do it obviously, but it introduces a lot more failure points.
You also need to deal with support placement, blocking people’s view, and NIMBYs, where as small cut and cover tunnels arn’t that much more expensive than any other sewer tunnel.
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You need delicate sensors to detect where every vehicle is, to check for fallen branches, that confirm that your switch points actually moved, to communicate with each vehicle, and a thousand other things. All of this needs to work in heavy wind, rain, snow and ice. All of your delicate electronics need to handle massive shifts in temperature, and the resulting expantion and contraction is indeed the primary cause of failed electronics. All of this is exposed to all of the above day in day out for decades.
You can do it, indeed many automated metros and such do exist above ground, but it does significantly add to the cost of everything while dramatically reducing lifespan.
You can’t just put it in the middle of the road becuse you need to support it, and if supports are near cars than they need to be very big cast concrete structures in order to survive the inevitable crashes. You can build big supports and massive beams across the roads to support the track, but all of this adds about as much cost as just trenching it in the first place. There is a reason we don’t put our water mains above our streets.
People do very much care about what gets put above their skyline, and such a system would only really be practical if you were to expand it to residential and commercial areas, after all the primary point of the system is delivery speed, and nearly all industrial goods don’t need same month delivery, much less same hour.
Finally, the ground already often looks like swiss cheese in many cities, it’s just earth is good at spreading out loads and it’s very easy to carry the weight of that earth and the stuff above it with a few inches of concrete. Again, we run large water and sewer lines all over the place.
While this system is unlikely to be practical, Chicago had a similar idea over a hundred years ago after all and abandoned it in favor of trucks for a reason, putting it on stilts over everyone’s heads is not liable to make it more practical.
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A cart that has a computer telling it where to go is a robot.
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If it is on the surface it needs to mix with humans. safety becomes a hard problem. run underground and your safety becomes the simple there is nobody there - if there was the power would have been cut and so the vehicles can’t move.
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But nobody is there so insurance replaces the package and you dig a new tunnel.
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Insurance cannot bring a dead person back to life. It can give the heirs money, but that is not the same. On the surface humans will need to cross the roads and we don’t know how to do that safely. In tunnels humans will never need to cross these vehicles and thus it is much easier to not kill someone.
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Trams have drivers to hit the emergency stop.
You can get insurance to cover whatever you want. Normally it isn’t cost effective to get insurance for small losses from a minor accident, but you can get it if you really want (you will need to see a specialty provider)
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