Florida has 8,945 bridges crossing natural areas or waterways of which The Florida Department of Transportation (FDOT) maintains 3,659 of them. Many of these existing bridges have steep abutments and/or rubble riprap scour protections making traversing under the bridge challenging for wildlife and humans alike, and especially impassable for hooved animals (deer). Wildlife crossings are a proven method of reducing wildlife vehicle collisions, improving driver safety, and promoting wildlife habitat connectivity. However, constructing new wildlife crossings or replacing existing bridges to incorporate wildlife crossing features can be cost prohibitive. With many of Florida’s existing bridges bisecting natural habitats and landscape corridors, it offers a perfect opportunity to retrofit existing bridges to promote wildlife usage. After a request from the Florida Fish and Wildlife Conservation Commission to improve wildlife connectivity of two existing bridges along Interstate 75 (Alligator Alley), FDOT investigated several different approaches to retrofit the bridges. After settling on the concept of adding shelves or ledges under the bridges, FDOT determined the best method of construction was through supplementing an existing maintenance contract. This initial design was comprised of shifting the riprap boulders, stacking three rows of sand cement riprap bags, and backfilling with limerock to create a shelf on each side of the canal. New wildlife fencing was also incorporated into the project. Post construction monitoring yielded amazing results as bear, racoons, coyote, and Florida’s iconic panther were all captured utilizing the new shelves. With the success of this initial application, FDOT has refined the shelf design to make construction easier, less labor intensive, and less costly. FDOT is planning on constructing several more of these bridge retrofits incorporating wildlife crossing features including shelves under existing bridges. This presentation will showcase FDOT’s lessons learned, innovative approach, and design details for retrofitting existing bridge crossings with wildlife crossing features.