Ferro leads the agency charged with ensuring the safety of large trucks and buses, particularly those involved in interstate commerce. An estimated 525,000 commercial motor carriers and 3.5 million commercial drivers come under her regulatory purview. Raised in Larchmont, N.Y., Ferro, 55, has a bachelor's degree from St. John's College in Annapolis, Md., and a master's in public policy from the University of Maryland. She spent two years as a Peace Corps volunteer in Côte d'Ivoire. Early in her career, Ferro worked for the Maryland General Assembly, primarily on the staff of the House Ways and Means Committee. She then spent a decade at the state Transportation Department, ultimately rising to the post of administrator of the motor-vehicle agency. Ferro was president of the Maryland Motor Truck Association before being tapped to join the Obama administration in 2009. She has led the agency's efforts to raise the safety bar for carriers hoping to enter the industry, remove unsafe drivers from the roads, and require carriers to maintain high standards. Describing herself as a workaholic, Ferro is pursuing the goal of zero fatal crashes involving buses or trucks. She and her husband have been married for 24 years and have two grown children.