The length of the ecoduct is 150 meters. On the edges of the ecoduct walls are constructed in order to reduce traffic disturbance. The walls are one meter and a half in height and planted with trees and shrubs. In the middle part a more open vegetation is planned. In this way possibilities for passage are created for both fauna species of forests and fauna species of heath land and drifting sand area.
Infrastructure is one of the main causes of habitat fragmentation.
The consequences include destruction of habitats due to road building, injury or killing of animals by traffic, disturbance, and its negative effects on animals due to noise, light and movement. The viability of a population decreases. These aspects may have a strong negative effect on the ecological value of habitats. Activities to mitigate habitat fragmentation caused by infrastructure are presently embedded in the policy of different countries. 7 Summary of experiences The ecoduct near Kootwijk is used by various terrestrial mammals, such as common shrew, wood mouse, roe deer, white-toothed shrew, pine marten, wild boar, field vole, red deer.