The purpose of this document is to provide practical advice and guidance to proponents of roads on potential strategies that may be used to mitigate the impacts of roads to terrestrial and semi-aquatic wildlife species once a transportation facility has been identified as required or has been constructed, and the facility has already been routed or constructed to avoid, or minimize impact on, sensitive habitat areas.
Road undertakings may consist of new construction as well as twinning, widening or rehabilitation of existing roads and bridges. All projects are undertaken through an Environmental Assessment (EA) Process. In planning, wildlife habitat avoidance should be considered to the extent possible in association with other environmental factors and competing resource trade-offs. In design, further refinements (e.g., horizontal and vertical alignment shifts) may be made along the alignment to avoid identified impacts to wildlife.
Guidance in this document is based on an extensive literature review of the current scientific knowledge supplemented by professional experience. The increased recognition that road design and landscape ecology are intertwined, has led to the heightened consideration of road effects on wildlife and corresponding wildlife mitigation strategies.