New research shows that mountain lion/cougar/puma often steer deer populations away from human roads.

Biologists studied puma and deer populations living in the Pacific Northwest. They found that areas that had a greater puma presence tended to have fewer deer-vehicle collisions.

“On the Olympic Peninsula of Washington, deer alter their use of both space and time where pumas are present, overlapping less with roads and reducing activity at night, when some of the most dangerous collisions occur,” Suraci said.

Their findings, published Thursday in Current Biology, also provide some insight into how exactly pumas are causing less car accidents.

https://gizmodo.com/pumas-are-helping-make-our-roads-safer-study-finds-2000794767