4 Comments
User's avatar
Jesus De Sivar's avatar

Wonderful.

I couldn't help but to write down the full permutation grid and assign it a *classification code*.

The code assumes that *Street connectivity* is basically fixed (so, for example, if you live in a D city, you will never turn it into a C city), but the *land use* and *Street safety* allows you (or the city government) to take it to another level. So, for example:

If you start with a D9 city (Disconnected-Single-Unsafe) but you improve the street safety, you can easily turn it to a D8 city (Disconnected-Single-Safe for Adults). However, you're going to need to improve land use in order to take it to D5 (Disconnected-Multi-Safe for Adults) or even D2 (Disconnected-Mixed-Safe for Adults) level. And once you're at D2, it becomes feasible to turn it into D1 (Disconnected-Mixed-Safe for Kids).

Connectivity - Land use - Safety - Classification

Connected - Mixed - Safe K - C1

Connected - Mixed - Safe A - C2

Connected - Mixed - Unsafe - C3

Connected - Multi - Safe K - C4

Connected - Multi - Safe A - C5

Connected - Multi - Unsafe - C6

Connected - Single - Safe K - C7

Connected - Single - Safe A - C8

Connected - Single - Unsafe - C9

Sparse - Mixed - Safe K - S1

Sparse - Mixed - Safe A - S2

Sparse - Mixed - Unsafe - S3

Sparse - Multi - Safe K - S4

Sparse - Multi - Safe A - S5

Sparse - Multi - Unsafe - S6

Sparse - Single - Safe K - S7

Sparse - Single - Safe A - S8

Sparse - Single - Unsafe - S9

Disconnected - Mixed - Safe K - D1

Disconnected - Mixed - Safe A - D2

Disconnected - Mixed - Unsafe - D3

Disconnected - Multi - Safe K - D4

Disconnected - Multi - Safe A - D5

Disconnected - Multi - Unsafe - D6

Disconnected - Single - Safe K - D7

Disconnected - Single - Safe A - D8

Disconnected - Single - Unsafe - D9

Expand full comment
Andrew Burleson's avatar

Oh I like that! Thanks for sharing!

Expand full comment
bnjd's avatar

Thanks for writing this. We need an urbanist taxonomy.

Expand full comment
Roriedo's avatar

Helpful thank you! It’s interesting that many of us don’t have the language to describe place yet we know when a place feels good for humans. Variety of things to look at and experience is high up there (variety) as is safety. Where I live in Europe we have small villages which have become satellites of larger cities so poor connectivity of roads (not grids) and there are two methods most often used to make roads safer - to start off with roads are narrow and if they are not narrow enough, traffic calming measures are put in place (planting pots, staggered parking) and lots of 30km zones. It is intrinsically a choice to prioritize safety for people and bikes are prioritized not cars and traffic flow.

Expand full comment