Apparently they’re trialiang cheaper underground ones for insects amphibians and small mammals, and the results are pretty good.

*article from !hackernews@lemmy.bestiver.se. I don't think I can crosspost into comments.

These are very common in the Rock Mountains, especially in and around Banff National Park. I recall them building a lot of them about 10 years ago. A wonderful initiative.

Pretty common here in Germany. Oh, and we have frog fences, too!

The unfortunate thing with these is a lot of the times they don't even consult with biologists when considering the placement. Engineers just find the most convenient location / cheapest location to build and think the animals will use it but they often end up in a spot the animals don't really go to.

Despite there being very obvious game trails just down the highway.

So a lot of them are just expensive feel-good tourist eco green washing type propaganda.

I've been following the Annenberg Crossing since the earliest days. It's amazing