What are these things?

[gearya]

Those are mating platforms for the Alien Reptiles who have landed on Earth.

[Gogar]

WILDLIFE ESCAPE RAMP

I-70 Wildlife Escape Ramp Gypsum-Dowd — CDOT

New Phase of I-70 West Wildlife Fence Installation Underway — CDOT

[Nostril Cheese]

It's a wildlife ramp. Lots of those things up in the country where my grandpa lives.

[nynor]

Originally Posted by RWebb

most likely for pronghorn - the worlds' fastest runner (middle-distance); often called goats or antelope but are neither; they are in their own Family

it does look like a loading ramp, but note that animals could go 2 different ways to 'escape' and neither has gates

i've been told, don't know if it is true, that their vision is 8X, relative to ours.