Posts Tagged ‘Bridge’

the expansion of the Highway 400 bridge on Highway 7 West begins

Wednesday, July 26th, 2017

Many of you have already noticed the work that has begun on Highway 7 West at the bridge over Highway 400, so here’s an overview of the components of the newest mega-feat of engineering that you’ll see happening over the next few years.

The project is part of the Highway 7 West rapidway project in Woodbridge-Vaughan and it will include expanding the bridge – with the new segment added to the north side – by approximately 5 metres.

New piers

Construction includes four new piers to support the expansion, which means new foundations, footing and forms. With multiple lanes above and below, this is a complicated project and safety is paramount for both the travelling public and the workers on site.

Huge girder lift

In September, the first piece of a gigantic girder will be lifted into place. This girder, which is needed to support the expansion of the bridge, will be installed in five pieces.

Multi-use path and rapidway

What makes this project especially remarkable, is that it will not only include dedicated red-asphalt bus lanes, but a pedestrian and cycling path will be constructed in the centre of the bridge between the bus rapidway lanes. Once complete, the bridge will provide roadway and connections for all types of transportation modes.

Realigned ramps

That’s not all. In addition, two of the ramps on the east side of Highway 400 will be realigned in order to accommodate potential future development. And to accommodate the waterway conditions in the area, new culverts will be built under the new ramps.

You’ll be hearing much more about this massive undertaking as time goes on. Next month, we’ll look more closely at what’s involved in expanding the bridge itself – think piers, pile drivers and parapets!

 

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the CN Bridge is bigger and better than ever

Wednesday, February 10th, 2016

the CN Bridge is bigger and better than ever

Highway 7 West is changing quickly, with beautiful new sidewalks, tree planters and vivastations at Creditstone and Keele. Rapid transit is on the way to Vaughan, but it’s about more than just transit. Once the rapidway projects are complete, new infrastructure will be in place, including utilities and bridges.

crossing the bridge

One bridge that cannot be missed is the CN MacMillan Bridge, crossing over the largest rail yard in Canada. The MacMillan Yard was established in the 1950s and is named after one of CN’s founders, Norman John MacMillan. The yard operates 24 hours a day and handles over a million train cars per year.

bigger and better

As part of widening Highway 7, the CN MacMillan Bridge needed to be expanded a total of 8.5 metres on the south and north side. This involved rebuilding the underlying structure with 8,000 tonnes of backfill, 10 new vertical piers, and 18,000 tonnes of steel reinforcing 13,000 tonnes of cement, and laying a new road surface – all without disrupting CN rail operations below!

better for people too

The new bridge will have two new rapidway lanes, but it’s not just for driving. Pedestrians and cyclists will be able to enjoy the view as they cross on the improved sidewalks and a bike lane.

If you’re driving on the bridge in the coming weeks, you may notice the lanes being reconfigured, and a crane being “walked” from one side of the road to the other.

Once the rapidway project and the subway extension are done, this major transportation hub will be transformed for any mode of travel – rail, bus, and subway.