Transportation models predict the traffic volume of a given bridge, highway, or train and allow decision-makers to make more informed decisions about transportation projects and funding allocations that have major implications on the current and future landscape. However, transportation models are an unfamiliar concept to most people outside of the industry. What if transportation advocates better understood how to use this tool to advocate for a more sustainable future and better transportation options? “What Counts in Mobility” attempts to demystify some of the technical aspects of transportation modeling by breaking down the relationship between modeling and decision-making and presenting recommendations on improvements to the model and the transportation planning process.