Quote:
Originally Posted by Acajack
Even with the geography and terrain, I've always thought that much of the 11, 17 and 69 corridors in northern Ontario could be fairly easily twinned with at-grade intersections. They run through many unpopulated areas and the right-of-way is usually wide enough for two carriageways - even where it's been blasted.
In places where it's a bit tight, there is nothing preventing them from installing a concrete jersey barrier in the middle.
Here is an example of a jersey barrier on a pretty narrow segment that was blasted through rock:
https://www.google.ca/maps/@45.6459763,-...itch%3D0%26thumbfov%3D100!7i16384!8i8192
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It depends on how and where you want to do that.
On 11 between New Liskeard and Geraldton, it wouldn't be super expensive to create a 400-series highway. On 17 hugging the Superior shoreline north of the Sault, it's a different story.
It also comes down to what kind of standard of highway you want. If you want 400-series standards (large right of way, big curve radii, large median, moderate grades and access at interchanges only) on challenging terrain means bucks.
If you want an undivided 4-lane (or 2+1) road with at-grade intersections for minor roads, interchanges only at major intersections and to much lower standards, it's a different equation.
IMO, the biggest problem with 2 lane highways that are somewhat busy is reckless passing. People get stuck behind someone going slower, get frustrated and pass where it's not safe. A four-lane undivided road allows passing to happen at one's leisure. It also allows forgiveness in inclement weather conditions as they tend to become larger '2-lane' roads with a large buffer to oncoming traffic.
Sections of 17 and 11 could be made into something like Highway 10 north of Brampton and get most of the benefit of 4-lanes at a fraction of the cost.