Road kill is a serious threat for many species at risk. For some species road kill is enough to cause populations to decline. Although roads are pervasive across the landscape, roads can be made safer for wildlife. Fencing can keep animals off roads, and crossing structures under roads can maintain movement corridors.
The kind of fencing or crossing structure required will depend upon the species involved. This new guide published by the Ontario Ministry of Natural Resources and Forestry and co-authored by David Seburn of Seburn Ecological Services summarizes the current state of knowledge about road mitigation for the amphibians and reptiles of Ontario.
The guide can be read and downloaded here: https://seburn.files.wordpress.com/2016/11/bmp-road-mitigation-amphibians-reptiles-ontario-2016.pdf