Add vision zero description to vzv article

app/advocating/visionzero/page.mdx

@@ -36,14 +36,24 @@ leisure.
 The biggest barrier to more people cycling on big cities has always been safety.
 This is for good reason: in Vancouver as of 2023, about 100 people die in
 traffic every year while trying to get from point A to point B. It's no wonder
-people wish to have as much metal around them as possible while on the road,
-consequently the SUV trends makes it even less safe for those trying to get
-around, specially those on any other less protected transportation device:
-bicycles, skateboards, rollers, or just walking on two legs.
-
-That's where [Vision Zero][] comes in.
-
-[Vision Zero]: https://visionzerovancouver.ca
+people wish to have as much metal around them as possible while on the road, but
+unfortunately that also creates a negative feedback loop where more/bigger SUVs
+make it even less safe for everyone else - specially for those on any other less
+protected transportation device: bicycles, skateboards, rollers, or just walking
+on two legs.
+
+That's where Vision Zero comes in. Conceptually, it's [a multi-national effort
+to zero out traffic related fatalities, started in Sweden in 1997][vz]. It's
+recognized officially as a [provincial level program in British Columbia][bc-vz]
+as well as a [municipal one in Vancouver][cov-vz]. Most importantly, it's also a
+program that local advocacy groups can do serious work, like the [Vision Zero
+Vancouver][vzv] which aims to put some momentum towards Vision Zero for the
+metro region.
+
+[vz]: https://en.wikipedia.org/wiki/Vision_Zero
+[bc-vz]: https://www.visionzerobc.ca
+[cov-vz]: https://vancouver.ca/streets-transportation/transportation-safety.aspx
+[vzv]: https://visionzerovancouver.ca
 
 ### Average Crash Counts Sheet