Tremendous efforts were made during the 20th Century to reduce injuries and fatalities due to motor vehicle accidents. During the 1960s, the federal government mandated greater safety changes to automobiles and roadways. Seat belts were put into vehicles, improved night illumination and barriers to divide highways were erected. The cars and roads became safer by design and the percentage of crash fatalities declined even as Americans drove more miles each year. Mothers Against Drunk Drivers formed in 1980 and helped spur significant drunk driving legislation and increased enforcement nationwide.