Comments by "SmallSpoonBrigade" (@SmallSpoonBrigade) on "Why Skyscrapers Have Bridges (and will need more)" video.

When the city is approving permits for buildings, they can make it a requirement that there be an easement to cover that. I know of at least one building where there's a walkway that goes through the ground floor that is open to the public all the time. It's just that they have outside style doors along the corridor to lock when the building is closed. The bigger issue is that in order for it to be useful, you need to have a decent number of people that want to go between the buildings. Which is part of why most skybridges only exist between properties owned by the same developer when the buildings were being built. There's also tunnels that can be built as well for the same purpose.
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@TheStarBlack There's that, but the agency that handles the permitting can force the issue. But, unless you've got buildings being built at the same time, that can be a bit of an issue as both buildings have to be engineered with a sky bridge in mind, and it's not simply a matter of bolting one on, the buildings have to have provisions for properly securing the parts of the building that aren't included that wouldn't otherwise be necessary and that floor is effectively no longer available for tenants that want to rent the entire floor.
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They can be made to include an easement to cover the sky bridge related corridors when the permits are being granted. There's at least one building locally that has a similar walkway going from sidewalk on one side of the building to the other sidewalk as a means of including escalators along a rather steep hill. But, you have to have new buildings being constructed next to each other to even consider doing so. And it would have to be a city wide mandate with specific restrictions to ensure that a sky bridge could later be added when the building on the other side of the street was rebuilt.
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They don't really, they just go between buildings. I'm not aware of any place that has so many sky bridges that the side walk was at risk of being removed. The only skybridges around here are between buildings owned by the same party that regularly have business back and forth. It doesn't really make much sense to use them for other purposes and can easily save enough time to justify them.
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@bikesformice Those can exist in the US as well, and it is something that the zoning department sometimes gets in exchange for allowing a variance of some sort.
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@JonathanHilierChannel The issue there is that whichever floor you choose has to be designed in order to take a potential sky bridge that is only built if a new building is built next to it and somehow somebody has to pay to construct the sky bridge. It's just not terribly practical in most cases.
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