rive-sud Pont Samuel-De Champlain

[Habsfan]

Quite à en reconstruire un, pourquoi ne pas mettre assez de voies pour qu'il soit efficace longtemps??

 

C'est pour ça que je suggère un Pont à deux niveaux. Un niveau pour les voitures(8 voies minimum), et un autre pour les Autobus, Train Léger, Piste cyclable...

[reaper]

bah moi je suggère plutôt un pont suspendu a 5 voies avec 3 étages, donc plus mince que celui présent mais beaucoup plus efficace. Les 2 premiers étages auront 5 voies, pour aller dans chaque sens tandis que l'étage supérieur contiendra deux voies ferrées situées au centre en plus de deux voies pour les autobus de chaque cotées des voies ferées. De chaqwue coté du pont, il y aura une piste cyclable et une voie pour piéton.

 

Ou sinon un pont suspendu de deux étages avec 8 voies sur le dessus et 6 endessous. Dont deux voies sur le dessus qui seraint pour accomoder un SLR

Modifié 21 janvier 2011 par reaper

[pedepy]

tant qu'a faire des voies ferrees ou de slr, pourquoi ne pas juste amenager des voies de metro, qui seraient isolees des elements et pourraient alors permettre l'operation des trains a pneumatique a l'exterieur..

[Aurélien]

C'est pour ça que je suggère un Pont à deux niveaux. Un niveau pour les voitures(8 voies minimum), et un autre pour les Autobus, Train Léger, Piste cyclable...

 

Un peu comme le Queensboro bridge?

 

Le pont possède deux niveaux :

supérieur : 4 voies de circulation.

inférieur : 6 voies de circulation, dont 4 réservées au véhicules à moteur, 2 pour les cyclistes et piétons.

 

 

[Cyrus]

How about the George Washington Bridge, 14 lanes, eight on top and six on bottom, terrifically congested - but it carries 106 million vehicles per year compared to only 57 M for our Champlain, so the lane count would probably be adequate. It would be nice since from the south shore, you could have A-10 approach on the top level and with interchange with 15 and 10 on the island, while "route 9" traffic could use the lower and interchange with the 15/Bonaventure at a kind of double-stack which would take care of an entire merge / weave stupidity at the foot of the current bridge...

 

I think probably it would be better to simplify the interchange structures and have one level run one way and the other run the other way, the Geo Br is strange in the way it has two-way traffic on both levels (then again the lane count is asymmetric)

 

The approach on the Manhattan side is amusing, it has apartment buildings built over the freeway:

 

Could that be Nun's Island in 2111?

Modifié 22 janvier 2011 par Cyrus

[pedepy]

more like 2040 .. this just goes to show that no matter how many lanes you add, you'll eventually end up with congestion ... even if this new bridge gets 12 lanes to ride on, the initial lack of traffic will just further push sprawl onto the south shore while everybody and their grandma's start to drop mass transit to ride their cars onto the shiny new link to the city until well ... it gets clogged once more, by kilometers of unmoving automobiles!

 

by the way, what if this were a tunnel? how much more expensive would it be, to build and to maintain ? could they use the same entries and exits, if it were built sort of "right underneath" the current bridge, perhaps saving some of the costs and the need to find new land to arrange new connections ?

[LindbergMTL]

Ajouter plus de voies donnerait pas grand chose. Tant qu'on aboutit a' Montreal a' 2 voies, on n'avance a' rien. C'est ridicule d'avoir seulement 2 voies pour une aglomeration de 4 millions d'habitants, mais que voulez vous? Les e'lites et les leaders politiques veulent restreindre encore plus la circulation automobile sur l'ile de Montreal, alors ne revez pas trop a' un pont a' 16 voies.

 

On va se retrouver avec un pont : 2x 1 voie autobus (hybride/electrique) et covoiturage, 3 voies camions/autos. Pas de TLR.

[Malek]

more like 2040 .. this just goes to show that no matter how many lanes you add, you'll eventually end up with congestion ..

 

You'll end up with congestion because the city has grown, not because you just added lanes... doesn't that make sense?

[pedepy]

not entirely ... what i was saying was that when you build that new bridge with so many lanes that it starts off as being free of congestion, that same growth will tend to concentrate on the areas directly served by the bridge, causing it to clog up faster than you would expect it to if you would just take into account "overall growth" of the metropolitan area. couple that with a predictable drop in mass transit use, and the new lanes could fill up rather quickly... i'm sure this very scenario will play out in the next few years on the north shore, with the new highway 25 bridge. in my opinion in won't take very long for it to reach overcapacity, causing jams that could extend all the way into repentigny on the westbound 40 ...

 

basically, the better the roads you have the more cars you end up with ... this isn't unique to automobiles but you get the idea: just like parking space, you can never really solve traffic.

Modifié 22 janvier 2011 par pedepy

[Malek]

not entirely ... what i was saying was that when you build that new bridge with so many lanes that it starts off as being free of congestion, that same growth will tend to concentrate on the areas directly served by the bridge, causing it to clog up faster than you would expect it to if you would just take into account "overall growth" of the metropolitan area. couple that with a predictable drop in mass transit use, and the new lanes could fill up rather quickly... i'm sure this very scenario will play out in the next few years on the north shore, with the new highway 25 bridge. in my opinion in won't take very long for it to reach overcapacity, causing jams that could extend all the way into repentigny on the westbound 40 ...

 

basically, the better the roads you have the more cars you end up with ... this isn't unique to automobiles but you get the idea: just like parking space, you can never really solve traffic.

 

I really don't see that as a problem, we have a different mindset... the 25 is serving free land whcih needs to be developped at some point or the other, the southshore is very underdevelopped if you look at the map of greater montreal.

 

If we want to touch the 5 million mark, we will need bridges and highways and metros and all of that at once... so, your point is mute.