Wildlife bridge or ecoduct

Source: www.weertfm.nl

In one of its items, Webecoist mentions the design of a green wildlife bridge to help wildlife savely crossing a highway that passes through a national park in Colorado.
In the province of Limburg, Belgium they have already since 5 years such a wildlife crossing, the ecoduct Kikbeek. That this bridge is very useful for animals to pass the highway, is shown with these images by night made by TVLimburg of wildlife crossing the ecoduct.
Also in the Netherlands, several examples of wildlife bridges can be found.