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A comment on The Evolution of Tunnel Boring Machines. Parent comment

Re:The Evolution of Tunnel Boring Machines by bluGill on Tuesday October 10, 2023 @11:02PM (#37840408)
We need a lot more than one more lane. Traffic continues at high speeds long after it isn't safe. You are supposed to see 2 seconds between cars, yet when I get on a busy road and do that I often see 5 cars in the lane next to me in that distance. Little des moines where I live needs Huston levels of lanes to allow for safe travel. For a city with significant population you need a lot more.

Or of course better public transit. The vast majority of what people are driving for could be done without driving if transit was better.

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Re:The Evolution of Tunnel Boring Machines by andbberger on Tuesday October 10, 2023 @11:11PM (#37840465)
car travel would be a lot less appealing in throughput if subject to the same stringent separation requirements as rail travel.
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Re:The Evolution of Tunnel Boring Machines by rob74 on Wednesday October 11, 2023 @04:16AM (#37842107)
The stringent separation requirements are because of the long braking distances of trains, cars have much shorter braking distances - however even those are routinely violated by drivers. In Germany, the rule of thumb is "half your speed", i.e. 25 m for 50 km/h, 50 m for 100 km/h etc.
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Re:The Evolution of Tunnel Boring Machines by bluGill on Wednesday October 11, 2023 @08:05AM (#37843422)
The US used to use a rule of thumb like that, but counting seconds is a lot easier than estimating distances.
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