tag:blogger.com,1999:blog-8419444332771213285.post6943333346517670775..comments2024-03-28T11:51:19.078-07:00Comments on Caltrain HSR Compatibility Blog: High-Speed Rail DEIRClemhttp://www.blogger.com/profile/01374282217135682245noreply@blogger.comBlogger37125tag:blogger.com,1999:blog-8419444332771213285.post-45644487246648259982021-07-30T16:59:16.481-07:002021-07-30T16:59:16.481-07:00One correction, I think: the Sierra Point curve is...One correction, I think: the Sierra Point curve is 70 mph now.Timnoreply@blogger.comtag:blogger.com,1999:blog-8419444332771213285.post-11434556328259015072020-09-30T20:24:54.254-07:002020-09-30T20:24:54.254-07:00I believe they "closed" the King Street ...I believe they "closed" the King Street crossing to allow the Mission Bay/Common crossing to open.<br />Michaelhttps://www.blogger.com/profile/10280692412235449436noreply@blogger.comtag:blogger.com,1999:blog-8419444332771213285.post-4027886626235686862020-09-30T18:01:52.304-07:002020-09-30T18:01:52.304-07:00I think Berry / Mission Bay Dr (formerly Common) m...I think Berry / Mission Bay Dr (formerly Common) may have been grandfathered in by virtue of already having three tracks. These grandfather rights are important to preserve, as you can see elsewhere such as Sunnyvale Ave where the tracks extend through the crossing and not one foot beyond.Clemhttps://www.blogger.com/profile/01374282217135682245noreply@blogger.comtag:blogger.com,1999:blog-8419444332771213285.post-62003969720415196092020-09-29T14:22:17.923-07:002020-09-29T14:22:17.923-07:00Thanks. That's a much crisper explanation tha...Thanks. That's a much crisper explanation than mine. So going back your original tables, do we have data on actual cant (as rail sits today) for the turns you have in the table at the top post - I tried looking at old posts, but didn't see any cant numbers. Is cant actually 5 inches for Sierra Point curve or San Mateo curve?<br /><br />Second thought is whether going petitioning FRA to go from cant deficiency of 3 inches to 4 inches is a worthwhile effort given the speed increase.Martinnoreply@blogger.comtag:blogger.com,1999:blog-8419444332771213285.post-82749773121886186552020-09-29T14:18:07.039-07:002020-09-29T14:18:07.039-07:00For anyone who remembers, Berry St crossing in Mis...For anyone who remembers, Berry St crossing in Mission Bay was newly opened with 3 tracks. Judging by amount of restrictions, medians, light cycles, they had to put extra effort into making that PUC compiant.Martinnoreply@blogger.comtag:blogger.com,1999:blog-8419444332771213285.post-87803432525437779072020-09-19T04:00:37.554-07:002020-09-19T04:00:37.554-07:00@Max: 4-quadrant gates just close the other two “e...@Max: 4-quadrant gates just close the other two “exit” quadrants that more common 2-quadrant gates leave open. These (and/or raised center medians on crossing approaches) are meant to stop “drive-arounds” (when impatient motorists drive into the opposing lane of traffic to drive around a set of lowered 2-quadrant gates).Reality Checkhttps://www.blogger.com/profile/06974156676436895262noreply@blogger.comtag:blogger.com,1999:blog-8419444332771213285.post-19814140726299169482020-09-19T01:13:11.658-07:002020-09-19T01:13:11.658-07:00@Reality Check: And for what are there four quadra...@Reality Check: And for what are there four quadrant gates??<br /><br />Max Wysshttps://www.blogger.com/profile/07828566935411668866noreply@blogger.comtag:blogger.com,1999:blog-8419444332771213285.post-19001160051294140682020-09-18T16:40:13.986-07:002020-09-18T16:40:13.986-07:00You forgot the link, but I know the one you mean: ...You forgot the link, but I know the one you mean: <a href="http://www.europakorridoren.se/spargeometri.pdf" rel="nofollow">Track Geometry for High Speed Railways</a>, a master's thesis by Martin Lindahl.Clemhttps://www.blogger.com/profile/01374282217135682245noreply@blogger.comtag:blogger.com,1999:blog-8419444332771213285.post-3506722629029014952020-09-18T15:18:57.495-07:002020-09-18T15:18:57.495-07:00Here's a paper from 2001 discussing, among man...Here's a paper from 2001 discussing, among many other things, cant deficiency in various countries, including Germany.Peterhttps://www.blogger.com/profile/00326948451529910432noreply@blogger.comtag:blogger.com,1999:blog-8419444332771213285.post-3918364714901076852020-09-16T09:35:42.807-07:002020-09-16T09:35:42.807-07:00"recognized as excellent in their current boa..."recognized as excellent in their current board roles"?<br />You mean like Rod Diridon?kiwi.jonathanhttps://www.blogger.com/profile/18215458981556481196noreply@blogger.comtag:blogger.com,1999:blog-8419444332771213285.post-52987513936241775462020-09-16T09:34:14.422-07:002020-09-16T09:34:14.422-07:00Max, the term "exit signal" is a dead gi...Max, the term "exit signal" is a dead give-away that you're assuming European-style signalling practice. The US doesn't do that.<br /><br />if I recall correctly, grade-crossing enhancements was one of the differences between ITCS, and CBOSS.<br />kiwi.jonathanhttps://www.blogger.com/profile/18215458981556481196noreply@blogger.comtag:blogger.com,1999:blog-8419444332771213285.post-2146060180605078012020-09-15T14:08:15.993-07:002020-09-15T14:08:15.993-07:00Yes, arcady is correct. The FRA and Colorado PUC c...Yes, arcady is correct. The FRA and Colorado PUC cited papers/experts claiming that excessive warning times lead to driver impatience and dangerous "drive-arounds." The threatened shutdown was due to Denver RTD grade crossings suffering intermittent and unpredictably excessive warning times.Reality Checkhttps://www.blogger.com/profile/06974156676436895262noreply@blogger.comtag:blogger.com,1999:blog-8419444332771213285.post-50860755619100389572020-09-14T22:29:14.572-07:002020-09-14T22:29:14.572-07:00Actually, the other piece of the US grade crossing...Actually, the other piece of the US grade crossing safety philosophy is getting the warning time down as close to the legally required minimum of 20 seconds as possible. That is the purpose of the crossing predictors, and that was the problem in Denver. It wasn't that the grade crossings had too little warning time, it was that sometimes they had too much. I guess they were worried about drivers driving around the quad gates somehow.crzwdjkhttps://www.blogger.com/profile/06394805356595604336noreply@blogger.comtag:blogger.com,1999:blog-8419444332771213285.post-20979284718244370612020-09-14T22:27:33.754-07:002020-09-14T22:27:33.754-07:00Grade crossings in the US are not, in general, sig...Grade crossings in the US are not, in general, signal protected. The US grade crossing philosophy is "the train is coming, you better get out of the way", and the train's passage is seen as an inevitability.crzwdjkhttps://www.blogger.com/profile/06394805356595604336noreply@blogger.comtag:blogger.com,1999:blog-8419444332771213285.post-66085584350325589592020-09-14T12:50:56.389-07:002020-09-14T12:50:56.389-07:00Should have mentioned the date, sorry.Should have mentioned the date, sorry.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8419444332771213285.post-45687731467087444072020-09-14T12:10:47.765-07:002020-09-14T12:10:47.765-07:00Caltrans needs to take control of all these Author...Caltrans needs to take control of all these Authorities because they all seem to have their own, conflicting, agendas. They propose things which are detrimental to others and sometimes appear to be deliberately trying to rubbish others plans.<br /><br />One authority should be set up to manage all transit in the area. Individuals who are recognised as excellent in their current board roles should be selected for the new board to get a really good oversight as to what is happening. <br /><br />John Ramsbottomnoreply@blogger.comtag:blogger.com,1999:blog-8419444332771213285.post-32369101042067076762020-09-14T09:25:57.820-07:002020-09-14T09:25:57.820-07:00@jpk122s In my personal experience, the issue of t...@jpk122s In my personal experience, the issue of time spent stopped feeling longer than time spent in motion isn't quite the same at a station where there is a timed overtake with cross-platform transfers. Isn't that what is planned at RWC?<br /><br />When you can clearly see people changing trains then the stop feels purposeful and it's not as bothersome, even when you are on a local train that stops before and departs after the overtaking express. Maybe it's the feeling that your train's stopping has given *you* another option: "I could get on that express train if I wanted to."<br /><br />However, the scenario where you sit "in the hole" at a platform waiting for a train to pass you without stopping is definitely annoying.Owen Evanshttps://www.blogger.com/profile/15934578266643759835noreply@blogger.comtag:blogger.com,1999:blog-8419444332771213285.post-83489764728479506522020-09-14T08:12:23.654-07:002020-09-14T08:12:23.654-07:00@RealityCheck: As far as I know, grade separation ...@RealityCheck: As far as I know, grade separation is only required for 4 tracks or more. Indeed HSRs entire plan for San Jose to Gilroy is all 3 tracks with grade crossings, so it’s at least theoretically possible to add a 3rd track without grade separation. Whether CPUC would approve it on the Peninsula, I don’t know. It’s probably a case by case thing and might need to be accompanied by safety improvements like quad gates.jpk122shttp://twitter.com/jpk122snoreply@blogger.comtag:blogger.com,1999:blog-8419444332771213285.post-51167014716733986292020-09-14T07:30:49.483-07:002020-09-14T07:30:49.483-07:00@jpk122s: as I understand it, CPUC generally will ...@jpk122s: as I understand it, CPUC generally will not allow adding tracks across at-grade crossings. So adding a 3rd track requires grade separation.Reality Checkhttps://www.blogger.com/profile/06974156676436895262noreply@blogger.comtag:blogger.com,1999:blog-8419444332771213285.post-54355568541725965202020-09-13T19:49:14.877-07:002020-09-13T19:49:14.877-07:00Agree with you about 5th Ave being a great locatio...Agree with you about 5th Ave being a great location for a new station, but unfortunately it’s hemmed in by houses either side so it doesn’t seem feasible to construct a 4 track station there without a lot of residential property acquisitions which would be politically difficult. <br /><br />A potential compromise would be to run 3 tracks all the way through Menlo Park. Not as nice operationally as 4 tracks but could net most of the benefits. I feel like Caltrain should be planning for 3 tracks wherever there is no likelihood of near-term grade separation e.g. Atherton and Downtown San Mateo. It would allow more operational flexibility once HSR arrives and could be sold as reducing gate downtime, at least in theory. <br />jpk122shttp://twitter.com/jpk122snoreply@blogger.comtag:blogger.com,1999:blog-8419444332771213285.post-39175882892110583162020-09-13T14:03:54.259-07:002020-09-13T14:03:54.259-07:00Agreed, especially since the perception of time is...Agreed, especially since the perception of time is distorted (time at rest seems to go slower than time in motion). The solution is as you mention at least one four-track local-only station on either side of Redwood City. That means San Carlos (plenty of room between Cherry and Arroyo Streets) and a totally new station at North Fair Oaks, described <a href="https://caltrain-hsr.blogspot.com/2015/12/optimizing-midline-overtake.html" rel="nofollow">here</a>.<br /><br />A new Fair Oaks station makes a whole lot more sense now that Atherton will close, from the perspective of stop spacing, overtakes, and let's not forget equity. The Fair Oaks location at 5th Ave has <a href="https://caltrain-hsr.blogspot.com/2013/10/census-driven-service-planning.html" rel="nofollow">more people living within a mile radius</a> than any other location along the rail corridor from San Mateo to San Jose, and right now they can't easily use Caltrain!Clemhttps://www.blogger.com/profile/01374282217135682245noreply@blogger.comtag:blogger.com,1999:blog-8419444332771213285.post-47893348063215104122020-09-13T13:47:51.055-07:002020-09-13T13:47:51.055-07:00Worth noting, this was on July 18th 2020.Worth noting, this was on July 18th 2020.Clemhttps://www.blogger.com/profile/01374282217135682245noreply@blogger.comtag:blogger.com,1999:blog-8419444332771213285.post-67055894659235531092020-09-13T12:25:17.588-07:002020-09-13T12:25:17.588-07:00Excessive dwells is the reason I don't like t...Excessive dwells is the reason I don't like the "Moderate Growth" service plan as it has locals waiting around for 5 minutes at RWC. This is even worse than the 3 minutes at Bayshore/Lawrence in the HSR 6+4 plan. Any timed transfer station should include a 4-track segment with at least one local-only station before and after to minimize excessive dwells.<br /><br />In the meantime, Caltrain is seeking MTC funding for their "Enhanced Growth" 8tph scenario with level boarding and no HSR service or RWC overtake. If they manage to implement this, more realistic, proposal before HSR funding arrives, then a SEIR would be needed for HSR service as conditions would have changed.jpk122shttp://twitter.com/jpk122snoreply@blogger.comtag:blogger.com,1999:blog-8419444332771213285.post-52556324334423419812020-09-13T11:13:49.837-07:002020-09-13T11:13:49.837-07:00In case anyone would like to see a Caltrain video ...In case anyone would like to see a Caltrain video (not mine) on the progress of electrification (from the southern most point to SF). Someone took a cab-view video.<br /><br />https://youtu.be/Yz7COChSSQQ?t=2137<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8419444332771213285.post-76291860936037610992020-09-12T07:52:07.345-07:002020-09-12T07:52:07.345-07:00Max,
i think you need to re-read the entire CBOSS ...Max,<br />i think you need to re-read the entire CBOSS history again. Seriously.kiwi.jonathanhttps://www.blogger.com/profile/18215458981556481196noreply@blogger.com