| ▲ | testing22321 20 hours ago |
| > Nothing about this feels revolutionary or even evolutionary. They were trying hard to make a TBM that was faster than the current literal snails pace and cheaper than existing ones. It doesn’t appear they’ve had much success, though I’d rather they tried than just sticking with the status quo forever. > The fact that Teslas can't navigate autonomously even in these controlled, enclosed environments is also quite embarrassing. They can, regulations just don’t allow it yet. Coming soon (tm) |
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| ▲ | jazzyjackson 19 hours ago | parent | next [-] |
| Were they even trying to redesign a TBM? I think they were just using off the shelf boring machines at a smaller diameter (many tunnels one lane each) because building tunnels wide enough for a highway is exponentially more expensive. |
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| ▲ | rsynnott 13 hours ago | parent | next [-] | | The funny thing is, the actual industry is going in the opposite direction, because it turns out that a single big tunnel is in practice cheaper than a bunch of small ones. Conventional deep-bore metro lines consisted of two tunnels about 3.5 meters in diameter, but if you look at _current_ metro projects, the Dublin metro is using a single 10 meter tunnel, the newer Barcelona lines are using a singe 12 meter tunnel... The expensive bit of building metros isn't actually boring the tunnel, generally, not anymore. It's everything around that; securing a route, the disruption while it's going on, etc etc. So the last thing you want is to have to do it twice. | |
| ▲ | theptip 19 hours ago | parent | prev | next [-] | | Elon did some napkin math along the lines of “we will make tunnel boring ~10x faster by: 4x lower boring surface area, 4x faster boring because the industry are currently idiots not operating their machines at the limits that physics dictates”. (I can’t remember if there was actually another factor of 2 in there) Making a much faster TBM was absolutely part of the initial plan. | |
| ▲ | YouAreWRONGtoo 18 hours ago | parent | prev [-] | | [dead] |
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| ▲ | k4rli 14 hours ago | parent | prev [-] |
| Regulations about using their own tech to drive inside their own property? The problem rather appears to be with the tech itself being unable to perform "full self-driving". |
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