More than two decades of study by the National Park Service in the Los Angeles area has shown roads and development are not only proving deadly for animals trying to cross, but have also created islands of habitat that can genetically isolate all wildlife—from bobcats to birds to lizards. The species most immediately at risk, the mountain lion, could vanish from the area within our lifetime. Of all the area roads, multiple research and planning efforts have identified the 101 Freeway as the most significant barrier to the ecological health of the region—this crossing will re-connect an entire ecosystem that has long been fragmented by this almost impenetrable obstacle for wildlife. By building a wildlife crossing over the ten lanes of freeway and an access road — in the last 1,600 feet in the area that possesses protected land north and south of the 101 — this project will re-establish ecological connectivity for a multitude of native plant and animal species in the Santa Monica Mountains ecosystem.