This paper focuses on 2 case studies that monitored turtle and snake use of existing and new drainage culvert structures with exclusion wildlife fencing along 2 major highways: Highway 83 (Valentine National Wildlife Refuge, Nebraska, U.S.A.) and Highway 69 (boreal forest, Ontario, Canada). Turtle and snake passage through drainage culverts was monitored using remote motion-triggered game cameras positioned at the top of one entrance to each culvert. Both studies found that the freshwater turtle and snake species present used a variety of drainage culverts to cross the road. These reptiles approached the culverts equally, but once they entered, their crossing rates were significantly different (81% for turtles and 63% for snakes). Although these studies showed that reptiles will use a variety of drainage culverts, further research is required to define the characteristics of the culvert underpasses that these animals will use. These studies also showed that snakes are less willing than turtles to use culverts, which may be due to changes in temperature between the tunnel entrance and the ambient environment.