Crossing aid

A crossing aid is a structure in the course of a mode of transport (for example a road, a rail or a canal), which enables people, animals or plants to cross or under the mode of transport and thus connect habitats:

• Crossing aid for people; see crossing system
• Crossing aid for animals; see animal crossing aid , amphibian passage
• Crossing aid for biotopes; see green bridge and landscape tunnel

This is a disambiguation page for differentiating between several terms identified with the same word.