If passed as is, SB 827 (Wiener) could have a big impact on neighborhoods adjacent to rail and major bus transit in California by requiring local governments to relax development restrictions there. But simply stating “one-quarter mile” or “one-fourth mile” radius from these stops is not that helpful for most people to visualize where the affected neighborhoods are located, particularly when the bill currently includes some areas with “transit corridors” — and not just transit stops.

Fortunately, a tech-savvy (former Redfin CTO) SB 827 fan with time on his hands developed a very useful interactive map. If you live in California (or interested in what happens here), you can now click on Sasha Aickin‘s map and see how any particular city or county might be affected by the bill.

But perhaps more importantly, regardless of what happens with SB 827 during this legislative process, the map shows the battleground in California where we desperately need more housing to be built. All of the highlighted areas are prime transit-oriented spots, where residents can easily bike or walk to access transit. Study after study shows that development in these areas is what makes or breaks transit ridership.

And for a place like California, with its longstanding housing shortage, it also shows where badly needed new residential development would be most appropriate from an environmental perspective.

Happy viewing!