tag:blogger.com,1999:blog-6837159629100463303.post4149477354816296348..comments2023-06-18T01:25:08.748-07:00Comments on Information Transfer Economics: Traffic model on the Wicksellian roundaboutJason Smithhttp://www.blogger.com/profile/12680061127040420047noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-6837159629100463303.post-17137814918640777832016-03-30T14:03:00.510-07:002016-03-30T14:03:00.510-07:00Cheers, Nick.
And yes that's the reference to...Cheers, Nick.<br /><br />And yes that's the reference to the original soliton. The soliton term is from the 1960s, though. <br /><br />I am going to look at the dynamics of adding/subtracting density, etc.Jason Smithhttps://www.blogger.com/profile/12680061127040420047noreply@blogger.comtag:blogger.com,1999:blog-6837159629100463303.post-12465703656026519642016-03-30T07:17:43.343-07:002016-03-30T07:17:43.343-07:00I like the jamiton pun. John Scott Russel's so...I like the jamiton pun. John Scott Russel's solitary wave of something or other, that he observed in front of ships, and measured on a canal?<br /><br />I like this post. I tweeted it. I like the bit about "no real 'cause'". Or the real cause is too high density, which translates as too low (or too inflexible) buffer stocks of money.Nick Rowehttps://www.blogger.com/profile/04982579343160429422noreply@blogger.comtag:blogger.com,1999:blog-6837159629100463303.post-15616371075057177922016-03-30T07:11:55.733-07:002016-03-30T07:11:55.733-07:00This comment has been removed by the author.Nick Rowehttps://www.blogger.com/profile/04982579343160429422noreply@blogger.comtag:blogger.com,1999:blog-6837159629100463303.post-86854318595354067942016-03-29T22:53:42.741-07:002016-03-29T22:53:42.741-07:00I'm not showing the same model. As I mentioned...I'm not showing the same model. As I mentioned in the beginning, that was just background information.<br /><br />The entropy model has noise -- random fluctuations of the "cars'" speed.Jason Smithhttps://www.blogger.com/profile/12680061127040420047noreply@blogger.comtag:blogger.com,1999:blog-6837159629100463303.post-80926933488093002362016-03-29T18:29:07.954-07:002016-03-29T18:29:07.954-07:00BTW, I first heard of this traveling wave traffic ...BTW, I first heard of this traveling wave traffic jam idea from my brother years ago: he's an RF engineer and he's had to commute through part of Los Angeles on a daily basis for many years... which gave him plenty of time to contemplate the similarity between standing or traveling waves in his RF work and the traffic situation. I'll send him a link to this... he'll be amused I'm sure. (I'm sure there have been plenty of other engineers & physicists stuck in traffic [for seemingly no reason] thinking the same thing!)Tom Brownhttps://www.blogger.com/profile/17654184190478330946noreply@blogger.comtag:blogger.com,1999:blog-6837159629100463303.post-21452587126792886152016-03-29T18:14:06.733-07:002016-03-29T18:14:06.733-07:00I was wondering why your "driverless car"...I was wondering why your "driverless car" equivalent seems to have traveling waves which are "dissipating in the normal density fluctuations" while those in the Japanese experiment with human drivers seem to have jamitons which can be amplified rather than dissipate.Tom Brownhttps://www.blogger.com/profile/17654184190478330946noreply@blogger.comtag:blogger.com,1999:blog-6837159629100463303.post-38497576076629953402016-03-29T13:41:07.280-07:002016-03-29T13:41:07.280-07:00In the mathematical models, the cars are effective...In the mathematical models, the cars are effectively ideal drivers (as good as driverless cars), so no. <br /><br />Actually, ideal cars would make the jamitons *more* stable. Without some noise (jitter/dither), they would make traffic *worse*.<br /><br />Brake lights only change the perception range, so no jamitons would exist with or without "expectations". They're a fundamental property of fluid flows where constituents attempt to maintain distance, regardless of mechanism.Jason Smithhttps://www.blogger.com/profile/12680061127040420047noreply@blogger.comtag:blogger.com,1999:blog-6837159629100463303.post-80903034663816394832016-03-29T13:28:56.602-07:002016-03-29T13:28:56.602-07:00It'd be interesting to repeat the experiment w...It'd be interesting to repeat the experiment with driverless cars and see if the system is more robust to avoiding jams.Tom Brownhttps://www.blogger.com/profile/17654184190478330946noreply@blogger.comtag:blogger.com,1999:blog-6837159629100463303.post-38458323898223632152016-03-29T13:27:26.427-07:002016-03-29T13:27:26.427-07:00I wonder if in the vehicle case, it's the driv...I wonder if in the vehicle case, it's the drivers' expectations that end up amplifying the problem: they look ahead, see brake lights and touch their brakes, etc.<br /><br />Also, "jamitons" sounds like what a young aspiring particle physicist is told by his parents to go put on before going to bed.Tom Brownhttps://www.blogger.com/profile/17654184190478330946noreply@blogger.com