Wildlife Passage Design Calculator
Calculate underpass or overpass dimensions for target wildlife crossing species, including openness ratio and cost estimation.
Inputs
meters
vehicles/day
Results
Recommended Width
6 m
Recommended Height
4.5 m
Openness Ratio1.93
Openness AdequacyExcellent
Total Estimated Cost$249,000
Construction Cost$216,000
Guide Fencing Cost$18,000
Expected Collision Reduction39%
Annual Collision Savings$6,240
Payback Period39.9 years
How to Use This Calculator
- Select target species size (small mammal, deer, bear, etc.) to set dimension requirements.
- Enter the road width and average daily traffic volume.
- Select passage type (culvert, overpass, underpass, etc.) and soil type.
- Review recommended width, height, and openness ratio.
- Verify openness adequacy rating meets wildlife passage design guidelines before finalizing construction plans.
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