I opened Twitter today and one of the first tweets that I saw was about Austin passing a new resolution that allows 3 homes on every lot by-right; lowers the minimum lot size to 2,500 sf; and expedites planning approvals for triplexes and fourplexes. I then scrolled a bit further and found a tweet on how Vancouver is about to vote on a new motion that will allow 4-6 homes on every residential lot as-of-right. (The US typically uses the term "by-right", whereas in Canada we use "as-of-right".)

None of this is surprising. As many of you know, Toronto just did something similar by allowing fourplexes + a laneway or garden suite on every residential lot. But all of this is still noteworthy because it reinforces one simple fact: cities across North America are all starting to rethink their low-rise single-family neighborhoods. I know that many of you will say that fourplexes are not enough. We should be doing more. But I think this is an important step.

The single-family home hegemony is ending. We are now asking our cities to do more with the same amount of land.

Cruise, which I wrote about earlier this year, has just announced that its autonomous taxi service will soon be available to the general public 24 hours a day, across all of San Francisco. Initially the service was only available between 11PM and 5AM (when traffic volumes are lower), and in certain parts of the city. It was also free to use. In total, the company now has about 300 AVs operating across San Francisco, Austin, and Phoenix. And it has been charging for rides since June of this year.

If you're curious about what it's like to ride in one of these, check out the above video.

I'm not sure how I missed this before, but ground has just been broken on what is being called "the world's largest 3D-printed community." Co-designed by ICON and Bjarke Ingels Group and "implemented" by Lennar, the community, which is located north of Austin, Texas, will consist of 100 homes ranging from 1,500 to 2,100 square feet. There are 8 different floor plans and 24 different elevations to choose from. Each home will also come with rooftop solar panels.

Here's a short description on how the overall construction process is working:

To automate the manufacturing of homes ICON is using its Vulcan robotic construction system, a large, transportable printer that can be used in tandem with Magma, a cement mixing machine. The homes are being constructed out of Lavacrete, a durable-concrete polymer added in layers to form the structure’s facade and foundation by Vulcan. Their design blends Texas ranch vernacular with sustainable technology, providing a model for the future of large-scale 3D construction. The residences will adhere to a common design, featuring metal roofs, concrete floors, and distinct curvilinear and rib-textured concrete walls, which are the product of 3D printing.

It is quite a different looking construction site:

Now, there is certainly a conversation to be had about what these machines are building as a housing typology: This is still suburban sprawl, regardless of how the homes are being made and if there are solar panels on the roof. But if you ignore all of this for a minute, there is obviously something pretty incredible about 3D printing being able to now deliver stuff at the scale of a suburban housing project. It represents a fundamental change in how we build, in an industry that has a long history of changing very little.