Maria Cordeiro presented on methods for estimating the impact of transport interventions. She outlined opportunities for reducing emissions through integrated approaches like transit-oriented development and cleaner modes. Cordeiro discussed a range of methodologies for impact estimations and provided the example of a bottom-up approach used to estimate an 88% reduction in CO2 emissions and 90% reduction in criteria pollutants from a BRT system in Queretaro, Mexico. She concluded that a bottom-up approach is needed to fully account for impacts, data availability is a major challenge, and most emissions reductions in Queretaro came from optimizing transit services.