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amaist

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Messages posté(e)s par amaist

  1. 7 hours ago, danny12345 said:

    and may compromise performance and capacity at YUL, since the tunnel will be single track.  

    I don't see how it can compromise either performance or capacity at YUL. Only if they don't add another trainset or two to account for the longer network.

    The airport tunnel will be fine at single track. The YUL branch is fed by the mainline that passes through the Mount Royal tunnel. This is where the main capacity limit is set. The airport branch can take at best one third of that capacity maybe a little more with express trains.

    What might happen is if the system is a great success, then the planned capacity might not be sufficient for both the airport and Dorval users. Out of all the possible negative factors that one is the most benign.

  2. 1 hour ago, helios_the_powerful said:

    Donc il vont repositionner les indicateurs par la suite je présume... Mais on dirait quand même qu'il y a seulement 4 voies de large sur le pont. Les accotements ne seront pas aussi large qu'une voie de circulation?

    The shoulders will be pretty large. This would allow people who run out of gas on the bridge to only ruin their own day and not everyone else's. If they figure out how to coast to the shoulder, of course.

  3. Most people going to/from the airport (especially visitors who will go to downtown) will not notice the old decrepit Dorval circle. Since the new ramps have opened I have not again been even once on it. And I love it that way. I no longer have to battle taxi drivers for lane position to get out of there.

     

    I suppose MTQ feels that spending money on the south side would also be very expensive and is not worth the cost to them. In addition it would very disruptive to the traffic on the 20 to implement that project. At least two new underpasses need to be built to implement the cancelled plan. Many months of lane closures guaranteed.

    I agree that the situation as it is now is archaic. It's an embarrassment that an autoroute (the 520) starts and ends in traffic lights connecting to other autoroutes. Autoroutes should connect with proper interchanges.

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  4.  

    2 hours ago, Enalung said:

    Iron is one of the most abundant elements in the earth's crust. I suspect that as rich deposits get rarer, we'll figure out ways to get more efficient. Also, there are active plans to mine asteroids. Who knows what we'll be able to do once we do get there. There are some asteroids made up of minerals which are rare on earth which on their own, contain more when what we've mined since the we've discovered them, and there's a very large quantity of them out there. It might be that we'll discover far better alloys, or that we already know of those allows, but just don't have the quantities necessary to make use of them on a large scale.

    All very true. But... It all boils down to how much energy we have available to do all that. Less rich deposits take more energy to extract useful material. Asteroids? So far the energy cost of sending anything out of Earth's surface even to low earth orbit is a bit absurd. Can we eventually solve those problems? Possibly. Right now our energy sources are a bit problematic. Solar and wind are still being mastered. Other stuff will either run out or kill us first. 

    In any case, I don't think the new concrete and painted steel REM infrastructure is that terrible. It's purposeful and appropriate for it's time. The remnants of the industrial revolution around Lachine canal are also not Guggenheim worthy pieces, either. I bet when they were built there were some people upset with how they spoil the look of the place. But it was built for a purpose and served it well at the time. Now it is part of history. The same will happen to REM pillars and beams.

    • Like 1
  5. 7 hours ago, denpanosekai said:

    Slow down my man. 50k zone. Thanks for the video though.

    In Quebec 50 km/h zone means 70 km/h. Police will generally ignore you at up to 20 km/h over. I don't know anyone who ever received a ticket for anything under 20 km/h over. The few cases I know had other factors (driver's skin color, age, dress, look of the car, etc.)

    Limits are also generally set with the assumption of this practice.

    The speed in the video is actually pretty slow for that area. With less traffic cars move around 80 km/h there.

  6. This is going to be a fun spring on IDS. Also for people taking the A10 to downtown.

    The good news is that access to A15 North from IDS will open before they open the bridge. Sometime in April according to the presentation.

    scnarios-de-mobilit-liledessoeurs-rencontre-avec-les-commerants-et-les-employeurs-20-fevrier-2019-12-638.jpg

  7. 10 hours ago, Enalung said:

    Sarcastique ou non, il existe au Japon des endroits où il y a des intersections à niveau qui traversent les rails du Shinkansen. C'est un train à chaque 3 minutes, et c'est un service bidirectionnel.

    Shinkasen at-grade crossings are extremely rare. Where they exist the trains go slow near the station. On the main line where the trains travel at high speed there are never any crossings. Same for the TGV system in France. There are level crossings but only on the "Classique" lines in urban areas approaching the stations. Nobody will trust even the law abiding Japanese to cross a track with trains travelling 250 km/h. It's not even about respecting the law. Humans make mistakes even when they have the best of intentions.

    I would also like you find the mythical at-grade crossing of the Shinkasen line where they go every 3 minutes. I am not saying it doesn't exist. But I bet the road crossing the rails sees extremely little traffic.

     

  8. Looks like traffic apocalypse might be averted. 

    Originally they proposed to just shut down access from 15 North to Bonaventure and Ile-des-Soeurs for two months. It was impossible to keep the original ramps because they were raising the whole roadway there by almost 4 meters. 

    The most interesting slide from the presentation for me:

     

    Pages from comitedebonvoisinagebrossarddu26septembre2018-nouveaupontchamplain-180926225508.png

  9. 14 hours ago, franktko said:

    Le 'Critical Path' dans ce projet est certainement l'installation des voussoirs. Chaque voussoir prends 3 semaines à installer - il y en a 15 en tout à installer. Aujourd'hui (voir photo), ils installaient le 10e (je crois) donc il en resterait 5 - ce qui devrait prendre 15 semaines. Il reste 13 semaines avant Noël. Ils ont parlé d'installer au moins un voussoir à partir de la rive-sud pour accélérer, reste à voir comment ceci va se dérouler. Et puis une fois le voussoir installé, il reste plusieurs étapes (ciment, haubans,...) avant de pouvoir poser l'asphalte.

    En espérant un automne et début d'hiver tranquille côté météo... Go les boys!

    Looking and the construction web cam I calculated the number of days it took to install the last 2 sections over the Seaway. I counted from lifting into final position until lifting into final position of the next section. Yes, that's not the final step for each section. Attaching to the previous section and stringing the cables take at least another week or more but the steps are all the same so if I pick the same stage it works out.

    Section 7 lifted on August 24

    Section 8 lifted on September 9 (16 days)

    Section 9 lifted on September 27 (18 days)

    This is faster than three weeks per section but not fast enough to install the 6 remaining sections.

    What SSL is doing to catch up is to attach 2 or 3 sections on the South Shore side while being supported by massive jacks and scaffolding. They already started preparing for that. I don't know if they would string the cables to those sections before completing the span. How fast they can do that I have no idea. But it should make it necessary to install only 3 or 4 more sections from the North side. 18 days per section is 54 to 72 days. So from now it's late November to early December. 3 sections at 16 days is even better at 48 days.

    The amount of work necessary after connecting the span and stringing up the cables is not that great. The sections already have the concrete deck preinstalled on them. Almost ready for paving.

    • Like 2
  10. On 2018-09-17 at 9:09 AM, lma13 said:

    People just like to over whine about everything. I went to panama last friday at 8 am and there was plenty of parking at the old loblaws. Most people park at panama for no reason all the buses go straight to Bonaventure anyways in the morning.

    They park at Panama because there is a direct bus 45 Downtown -> Panama at almost any time. Most people do have a typical 9 to 5 schedule but there is always a chance that someone would need to go back early or late. And bus 45 is very frequent even outside rush hour so one is not stuck with the sparse schedule of the other RTL buses. Waiting 30 minutes or sometimes up to an hour for a bus at Panama station is not that appealing. And throwing money at taxi or Uber is ok in an emergency but doing it often is too expensive for most people.

    It's just more convenient and flexible to park at Panama.

    But I agree that the complaint about the 10 minute walk is pointless. As others said, there is still parking available even at 8:00 am and it's just in a different place. Parking after a winter storm will get interesting, though. The supply of spots everywhere will go down, for sure. But one can always get the direct bus as you pointed out ?

    • Like 2
  11. 22 hours ago, vincenzo said:

    Can't we just get rid of the viaduct and have the streets intersect like all other streets?

    Because when we have a marathon, a bike race or any other even that closes the streets this viaduct allows access to the Plateau from the south during the event. The event goes on either Sherbrooke or Berri, vehicle traffic goes on the other one and everyone is happy.

    It's also pleasant to go north/south without having to stop to cross Sherbrooke. Especially on a bicycle. The bike path does need an upgrade and it seems the current project does something about it. I will judge the result when it's done.

    • Like 4
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