A very common way of measuring traffic volumes is via bluetooth MAC address broadcasts. The Wisconsin DOT even makes the traffic counts derived from this data interactive and public: https://wisdot.maps.arcgis.com/apps/webappviewer/index.html?...

Interesting....evermore vehicles being BT enabled == traffic's always increasing?!

Sounds like great job security for DOTs.

Wow, had no idea about this. Thanks for sharing!

This would equate to forest management practices, not logging. They likely chipped or burned the underbrush and low branches after removing them from the forest, which wouldn't be a profitable business practice.

True, it was forest management, not just commercial logging.

PLA Filament (The most common type in personal 3d printing) is technically compostable, but realistically will likely end up in a landfill due to inadequate disposal practices in most waste management systems.

https://serc.berkeley.edu/compostable-plastics-are-they-play...

Thanks for the info. When 3D printing started to blow up I brushed it off due to the plastic waste I would produce. I need to look into it again it seems.

Also, certain types of 3D printable materials are reusable, if you put in the effort.

https://3dprint.com/42595/extrusionbot-cruncher-recycle/

I have mine on a homekit enabled outlet ($20) for scheduling and presence-based triggers. Unfortunately I haven't found a homekit enabled air quality sensor to pair with it.

Eve room? https://www.evehome.com/en/eve-room

Thanks! Last I checked they were no longer selling version 1 of this product and hadn't released version 2 yet. This might fit the bill.

This looks great but is exclusive to Apple products (requires an iOS device)!

There’s Netatmo Home Coach.

With the recent California fires, I've been looking for a decent option. Unfortunately the Elgato Eve sensor is no longer sold, and the few other consumer products still hover in the $100+ range with poor reviews.

PurpleAir sells an indoor sensor, but it appears to be limited release and somewhat 3D printed. https://www.purpleair.com/

The new version of the Eve Room sensor seems to be out: https://www.amazon.com/Elgato-10EAM9901-Generation-Technolog...

How does Eve Room compare to the Netatmo Home Coach?

Having both, I'd say that the indoor sensor is not worth it. It doesn't have both sensors so it isn't equipped to test them against each other. I do like the outdoor sensor though.

What are you using for indoors?

I would guess that it works similar to a water pump- pushing is always more powerful than sucking - but check this out for some detailed analysis (and more data on DIY air filters) https://smartairfilters.com/en/blog/where-should-an-air-filt...

I never would've guessed turbulent air would be more difficult to push but it makes total sense! Great find.

Excellent page.