There are easy ways to help research scientists understand where wildlife cross roads. Sadly, one way is through roadkill data. The California Roadkill Observation System (CROS), is a project of the Road Ecology Center at University of California, Davis.
The CROS system, with the help of citizen scientists (like YOU!), plots where the wildlife are dying and what roads have the most animal-vehicle collisions. You can upload your geotagged photo or submit an “observation” to help researchers understand where wildlife crossings are needed.