This document summarizes Sudhir Gota's presentation at the Transforming Transportation 2014 conference on crunching numbers for low carbon transport in Asia. It discusses challenges with bottom-up modeling of transportation emissions in countries like India and the Philippines due to limited data availability. It highlights the large mismatches between bottom-up and top-down estimates of emissions and fuel use in India and the Philippines. The presentation emphasizes the importance of improving data collection for developing more accurate bottom-up models and achieving countries' emissions reduction targets.