Road traffic kills an estimated 100,000 hedgehogs annually in Britain, making roads one of the most significant direct welfare threats to this declining species.
Road mortality represents a welfare crisis for hedgehogs because it is a preventable death that is not instantaneous - many road-struck hedgehogs are injured rather than immediately killed, surviving for variable periods in pain before dying or being found. The scale - potentially hundreds of thousands of individuals annually - makes this one of the largest direct welfare costs inflicted on any British wild mammal species by human infrastructure. Mitigation is technically straightforward: underpasses at known mortality hotspots, reflective road markings at hedgehog crossing points, and reduced traffic speeds in rural areas during dispersal season all reduce mortality. The challenge is that road casualty mitigation for wildlife receives minimal funding relative to its welfare impact.