The most recent year available for Average Annual Daily Traffic Volume data is 2020. Due to significantly decreased traffic during the COVID-19 pandemic, 2019 traffic data was used instead. 

For a detailed technical explanation of BirdNET, see: Kahl, S., Wood, C. M., Eibl, M., & Klinck, H. (2021). BirdNET: A deep learning solution for avian diversity monitoring. Ecological Informatics. https://doi.org/10.1016/j.ecoinf.2021.101236

 Pérez-Granados, C. (2023), BirdNET: applications, performance, pitfalls and future opportunities. Ibis, 165: 1068-1075. https://doi.org/10.1111/ibi.13193