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| Version | User | Scope of changes |
|---|---|---|
| May 2 2010, 5:09 PM EDT | WilliamWarren001 | 101 words added |
| Apr 4 2010, 2:45 PM EDT | kdyson | 34 words added, 18 words deleted |
Changes
Key: Additions Deletions
| UNDERPASS SIZE CLASS | DIMENSION RANGE | FUNCTION | PASSAGE EXAMPLES | SPECIES EXAMPLES |
| Class 1 - Small | 5' high or less | For small terrestrial animals desiring cover | Pipes, Small bridges & dry culverts. | Amphibians, reptiles, & small mammals. |
| Class 2 - Medium | Box culvert larger than 5' high to 8" by 8' | Allows passages by larger animals; Provides some cover. | Standard box culverts | Small to large carnivores |
| Class 3 - Large | Box culverts over 8' high & open span bridges | Allows plant growth and stream movement. | Standard box culverts, arch pipes, and bridges. | Large carnivores & ungulates (moose, elk, etc...) |
| Source: Adapted from www.wildilfeandroads.org | ||||
An underpass or other crossing method specifically designed to help animals cross roads and highways safely. Often fences will run on either side of the road in order to funnel migrating animals across the wildlife crossing.
AKA
other names, related ideas, etc.
PERFORMANCE CRITERIA
how is it measured? what are the criteria for its design or planning?
ILLUSTRATION
a diagram or drawing that demonstrates the basic pattern or concept
CASE STUDIES
links to separate pages documenting specific places or projects where this element is on display
ADDITIONAL RESOURCES
http://www.fhwa.dot.gov/environment/wildlifecrossings/main.htm - U.S. DOT FHWA, "Critter Crossings"
