CROS is the largest system of its kind in the US, combining agency and volunteer-collected carcass data. The data/metadata are compliant with international data management standards and CROS data have been used by transportation/wildlife agency planners and biologists, academic scientists, and consultants. The accuracy of species identification has been measured to be ~97% and median locational accuracy is ~13 m.
You can read more about the technical and scientific aspects of CROS here: http://journal.frontiersin.org/article/10.3389/fevo.2017.00089/full
Additional Metadata Information
The following fields are provided for observation-based point data.
Animal -- The animal species involved in the incident, including the scientific name.
Animal Category -- Whether the animal is a amphibian, bird, mammal or reptile.
Animal Group -- The subgroup the animal is member.
Observation Date -- The full date and time of the observation / incident.
Year -- The Year the incident occurred. This is to summaries the data by year.
Location -- The latitude and longitude coordinates of the incident (WGS 84).
California Roadkill Observation System. (Year, Month). https://www.wildlifecrossing.net/california/