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The dark grey supports are definitely temporary. The final bridge will only have the network of tensioned wires. There's an example of this network arch bridge here for the Orsdall Cord between Manchester Piccadilly and Manchester Victoria stations. @Westey provided an interesting post on...

Another great post, thanks @Westey In a truss ridge, diagonal members may be under compression or tension load under different load cases. In the network arch, that can't be the case as diagonal members are just wires with no compressive strength. Does this mean that the wires will be...

It was concluded, earlier in the thread, that the profile of the bridge changes too many times, as well as curving along Eglinton Ave, for it to make sense to use pre-casting or to attempt balanced cantilever construction (see Westey's post on that in the Ontario Line thread). The cross section...

Thanks for the insightful post Westey. Exactly the insight I was hoping someone could provide.

The article referenced in kotsy's post on Monday: https://urbantoronto.ca/forum/threads/ontario-line-3-metrolinx.6155/post-2378205 notes that the "Don Valley Crossing Bridge is a balanced cantilever design". During construction that means that the bridge is gradually built-out either side of...

View SE from Wallace Avenue footbridge with progress installing 4th track for the Weston sub. No track NW of the bridge yet, to tie in with that previously laid.

Halton Region has commenced property acquisitions "for the municipal purpose of facilitating the infrastructure improvements and widening of Regional Road #25 from Steeles Avenue (Regional Road #8) to 5 Side Road in the Town of Milton and the Town of Halton Hills"...

Unfortunate reminder from France on the risks of mixing high-speed rail and level crossings. "There were 89 incidents [of trains hitting vehicles on crossings] recorded in France in 2024, causing 20 deaths"

Just to emphasize, that means all that's holding back AD2W hourly service to Kitchener (with 30-minute peak direction service) are these items: Guelph station second track, Acton station second track, grade separating GO and CN tracks east of the Credit River bridge (not at Silver, which is west...

Yes, this is what's needed. With the dotted line being an extension along Wilson out to Woodbine GO, or the Airport transit hub if it emerges.

Sorry but I think this is not the Don Bridge. Those look like precast concrete segments after they've been epoxy'd together not steel sections.

But are they economical? What capacity to move people is delivered per $1M expended? And, how much land do they use up that could be used more productively?

That may be the whole point. Who knows.

The new Halton Region Integrated Master Plan has projected 2051 populations for Milton and Halton Hills of 455k and 169k. With this projection, Milton's population will be slightly higher than Oakville's. The Milton & Halton Hills built-out urban area are shown in a beige colour in this map...

Halton Region has published an Integrated Infrastructure Master Plan for the period to 2051. It covers water, wastewater, regional roads and transit infrastructure (not transit services, which are provided by GO Transit and the lower tier municipalities). Transit infrastructure proposed...

Once the USEP project is complete, all Lakeshore (East & West) trains (& some Via trains) will operated from its new platforms, freeing up capacity in the old shed. So, in theory, work could start on merging platforms as soon as USEP is complete. That work is part of the OnXpress design and...

Unless the plan has changed, platform widths are supposed to double with 2 times the vertical accesses.

Reminder that Cadence is supposed to run both the high-speed, dedicated corridor, and the not high-speed, CN corridor, services for the duration of their franchise. The RFP asked for a service pattern based on Kingston as a hub, instead of as a stop on the route between Toronto and...

The London Underground "tube trains" and the Glasgow Subway trains both have to have escape doors at the ends of the train allowing passengers to climb down a step ladder onto the track to escape the train in an emergency. Eglinton has a side walkway throughout the tunnel allowing the side...

I believe the main problem is when a line of conducting material (steel rail lines, overhead electricity supply wires) runs parallel with overhead electric transmission wires, a current will be induced in the line. With rail lines you can earth them I guess, but with the OCS you're trying to...