Passenger rail travel and rail freight enjoy a safety record never matched by motor vehicle traffic. Particulate and ozone pollution resulting from truck diesel emissions plague residents in communities along major truck freight routes. Research shows exposure to diesel emissions causes disease, including asthma in children and increases the number and severity of asthma-related hospitalizations. Further, a constant campaign for longer, heavier, faster truck limits places all highway travelers at greater risk. Moving mid- and long-distance heavy trucks and freight trailers by Steel Interstate rail will save lungs and lives and money, too.