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Rotary to Roundabout at Port Hastings

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froggie:
Has the province ever considered a high level fixed bridge to replace the swing bridge?  Or would there be too many impacts from such?

paulthemapguy:

--- Quote from: froggie on August 25, 2021, 09:08:49 AM ---Has the province ever considered a high level fixed bridge to replace the swing bridge?  Or would there be too many impacts from such?

--- End quote ---

The roadway is so close to the water that I doubt you'd have enough width to build a stable embankment leading up to the elevated bridge...unless you make the whole thing into a big tall (expensive) flyover ramp.

cbeach40:

--- Quote from: paulthemapguy on August 25, 2021, 09:31:54 AM ---
--- Quote from: froggie on August 25, 2021, 09:08:49 AM ---Has the province ever considered a high level fixed bridge to replace the swing bridge?  Or would there be too many impacts from such?

--- End quote ---

The roadway is so close to the water that I doubt you'd have enough width to build a stable embankment leading up to the elevated bridge...unless you make the whole thing into a big tall (expensive) flyover ramp.

--- End quote ---

In a scenario like that the embankment may well be more expensive than having it be almost entirely structural. Tunneling may be a better option, though having no idea as to the geology, hydrology, etc there not sure how technically feasible that may be.

In any event, the design here seems to scream that they're trying to save money and minimize local property impacts. Doing anything like that, or doing this junction up as something that would perform better like and interchange, seems beyond what they're willing or able to do here.

ghYHZ:

--- Quote from: cbeach40 on August 25, 2021, 03:23:11 PM ---
--- Quote from: paulthemapguy on August 25, 2021, 09:31:54 AM ---
--- Quote from: froggie on August 25, 2021, 09:08:49 AM ---Has the province ever considered a high level fixed bridge to replace the swing bridge?  Or would there be too many impacts from such?

--- End quote ---

The roadway is so close to the water that I doubt you'd have enough width to build a stable embankment leading up to the elevated bridge...unless you make the whole thing into a big tall (expensive) flyover ramp.

--- End quote ---

In a scenario like that the embankment may well be more expensive than having it be almost entirely structural. Tunneling may be a better option, though having no idea as to the geology, hydrology, etc there not sure how technically feasible that may be.
--- End quote ---

It would be a deep tunnel! The Causeway base is 65m (213') deep in the centre of the Strait.

A Cantilever Bridge was proposed in 1903.....50 years before the Causeway.



Perhaps an elevated structure would work.....following the s-curve of the causeway...... climbing and reaching it's highest point above canal. It would then land up on the cliff on the Cape Breton side roughly at the new roundabout. There is also a railway on the causeway so a swing-bridge would still be required under a  new structure. (Below.... this gives an idea of the width and alignment of the causeway)



And watching the video in the link above....it sounds like these are stop-gap improvements on a fixed budget until they make a long term decision on the swing bridge. 

webny99:

--- Quote from: ghYHZ on August 21, 2021, 10:56:54 AM ---
--- Quote from: froggie on August 21, 2021, 10:42:07 AM ---
--- Quote ---Currently when the bridge is open traffic backs up through the rotary impeding other traffic not intending to cross the bridge.
--- End quote ---

Despite the "road rage" potential, this is probably why they're building the storage lane...so that bridge openings don't back traffic up into the roundabout.

--- End quote ---

That's exactly why they're doing it and discussed in the video in the link above. A considerable amount of traffic can build when the bridge is open.....usually for about 15 minutes but can extend to 30. (I get caught quite often!)

And you can get a string of traffic entering the rotary from TCH105 westbound that have managed to stay together since arriving on the Newfoundland Ferry a hour & a half away.......450 cars/trucks/RVs and only a few passing lanes!

--- End quote ---

With proper signage, I wouldn't think road rage should be an issue. If traffic backs up in both lanes, as it should, drivers will just have to get used to alternating once the bridge opens back up.

The bigger issue might be that traffic could still back up into the roundabout even with another lane... as it presumably does now with the existing rotary.

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