Elon's "Double stacked" lanes and Thoughts on driving at faster rates of speed?

Mr X · Dec 1, 2014

2 Questions....

Does anyone remember/know the interview where Elon talked about the double stacked lanes? Driving on top and below which would improve traffic flow

And also what do you guys think about having special lanes for driving at higher rates of speed (aka fast lanes)?

RDoc · Dec 2, 2014

Personally I think a better use of a dedicated lane would be for auto-driving cars that communicate to each other such that they can be spaced very closely. Obviously no cars under manual control would be allowed, so the cars would have to talk to each other to ensure that they were all under automatic control, their software was up to date, and mechanically they were in good shape.

The problem I see with high speed lanes is that two adjacent lanes with large relative speed differences is that if someone twitches into the high speed lane the potential for a very serious crash is high. Low relative speeds I think greatly lessens the problem.

ATC@LWSK · Dec 2, 2014

IIRC, it's either the Vanity Fair one with Walter Isaacson or the One on One at MIT AeroAstro Centennial Symposium. Those are the last two great interviews with Elon.

MikeC · Dec 2, 2014

I recall him talking about dropping sectional pieces of double stacked freeway as a solution for traffic on the 405. This was at the 3rd Street Promenade Santa Monica store sometime last year but I can't remember what the exact event was. I think it was somewhat around the time of the beginning of European deliveries. If Elon thinks it will work, I'm all for it.

jerjozwik · Dec 2, 2014

adding lanes like the 110 hov to the freeways is the simcity players solution to congestion. pretty much every time i mention that idea to anyone they immediately talk about the san fransisco earthquake and urban blight.

...personally i think its a beautiful stretch of freeway both above and below.

TEG · Dec 2, 2014

Mr X said:
Does anyone remember/know the interview where Elon talked about the double stacked lanes? Driving on top and below which would improve traffic flow

10 Questions for Elon Musk - TIME

Is there a technological limit to what you are capable of creating? — Patrick Scott, WASHINGTON
As long as it doesn't violate some law of physics or economics, I guess there's ostensibly no limit. One thing I know I could get right, though it sounds mundane, is to apply aerospace-engineering techniques to create a double-decker freeway with prefabricated, high-strength metal sections that are dropped into place to double up the lanes so you don't have traffic. I've had plenty of time to contemplate it on L.A. freeways.

And, previously from "the Governator":
Schwarzenegger Proposes Making the 405 a Double Decker Freeway | Streetsblog Los Angeles

Saghost · Dec 2, 2014

RDoc said:
Personally I think a better use of a dedicated lane would be for auto-driving cars that communicate to each other such that they can be spaced very closely. Obviously no cars under manual control would be allowed, so the cars would have to talk to each other to ensure that they were all under automatic control, their software was up to date, and mechanically they were in good shape.

The problem I see with high speed lanes is that two adjacent lanes with large relative speed differences is that if someone twitches into the high speed lane the potential for a very serious crash is high. Low relative speeds I think greatly lessens the problem.

+1. I'm a fan of the train lane, I've been suggesting it for a while. Technically, you don't *need* the cars to talk to each other, as long as you have a way to validate they are all self driving - while in principle expanding their view through the other cars is useful, in practice they have pretty fast reaction times without it (though it could be useful.)

The lane could be set up with entry points that only open when the car talks to the lane control computers as a validation.
Walter

jaanton · Dec 2, 2014

After the Loma Prieta Earthquake, CalTrans pretty much ruled out all stacked freeways. That's why the new East Span Bay Bridge is not stacked.
http://upload.wikimedia.org/wikipedia/commons/4/4a/NimitzFreewayRibbonLomaPrietaQuake.jpg

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Elon's "Double stacked" lanes and Thoughts on driving at faster rates of speed?

Mr X

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