The Wallis Annenberg Wildlife Crossing over Highway 101 in Agoura Hills, under construction. Photo: Caltrans.

Roads are a significant barrier to wildlife movement, whether you are a small salamander or a wandering wolf. Environmental activists like guest Steve Blackledge of Environment America have been advocating for the construction of wildlife crossings — physical structures, from big bridges to small culverts — to help mitigate the impact of roads.

But in this advocacy strange bedfellows have emerged, like motorcycle clubs, whose members want to avoid hitting animals when out riding and insurance companies who want to reduce claims. Now there is a bipartisan effort at both the federal and state government to identify hot spots where roadkill is common, and to create new structures to help both wildlife and drivers more safely get to their destinations.