Recently there’s been an effort near Santa Cruz to add a wildlife crossing and protected adjacent property near highway 17. Often highways split animal ranges and cross areas with critical food and water sources which all animals need access to. These highway crossings are particularly important for species with large ranges like mountain lions but they help almost all species living near the highway. The Laurel curve crossing will increase wildlife mobility and decrease dangerous vehicle-animal collisions which kill animals, damage vehicles, and injure or even kill people.
For a good idea of how these work, here’s a video of which talks about the effects of a similar program in Wyoming which added 41 crossings on a section of highway which significantly reduced the amount of road kill and increases human safety in the region.