24.7.4 Underpass Crossings

Underpass crossings allow animals to pass underneath the roadway without interacting with traffic as shown in
Figure 24-2
. The vertical clearance will vary based on site-specific needs and species. Underpass crossings can also be designed as a dual-purpose water crossing.
Figure 24-2: Wildlife Underpass Crossing
Wildlife Underpass Crossing ( click in image to see full-size image)