Culverts are an effective tool to decrease the effects of habitat fragmentation and vertebrate mortality posed by busy roads, providing a means of safe passage for a variety of wildlife species. Eight culverts were installed under a 1.1-mile segment of Vasco Road in eastern Contra Costa County, California as part of a Caltrans Local Assistance road safety improvement project to increase road permeability and decrease road mortality. Multiple box and pipe culvert designs were constructed with variable slopes, directionality, and line-of-sight configurations along with barrier fencing, jump-outs, and guide fences. Time-lapse and passive infrared trail cameras were used at seven selected culverts to evaluate wildlife usage and efficacy with an emphasis on California red-legged frogs (Rana draytonii) and California tiger salamander (Ambystoma californiense). Trail cameras were deployed for 2,979 trap nights over two consecutive wet seasons between January 27, 2017 and May 31, 2018. Data were analyzed to quantify capture events, culvert crossings, frequency of use by species, and trail camera performance (time lapse vs. motion detection) across taxa. A total of 4.41 million photos recorded resulted in 7,208 total capture events, including 47 California red-legged frog (1,035 images) and 14 California tiger salamander (173 images). Thirty-four species were documented using the culverts resulting in 110 crossing events (3 snake and 7 mammal species) with a crossing rate of 9.87%. Behavioral differences were observed across taxa for species using the culverts for passage compared to those using culverts for other purposes, e.g. foraging, refugia, thermoregulation, and social interactions. No crossing events were recorded for California red-legged frogs or California tiger salamanders; however, this was likely a limitation of the trail cameras failing to reliably trigger on amphibians due to their slow locomotion and external temperature near that of the background substrate. Further study will determine how amphibians use culverts and how culvert design can be improved to facilitate amphibian crossings.