Driverless cars. High-speed trains. Fewer flights. The nature of intercity transportation is changing, and Megan Ryerson is on the cutting edge of it. Dr. Ryerson’s work involves optimizing air and vehicular transportation to make them safer, less expensive, and more efficient from the passenger perspective. Her models analyze how these future technologies could change the way humans choose the way they travel between cities, and how possibility new vehicle technology could lead to more highway traffic and empty airports.