Mercury (element) and galinstan alloy thermometers are also an option. Mercury thermometers are still occasionally used in the medical field because they are more accurate than alcohol thermometers, though both are commonly being replaced by electronic thermometers and less commonly by galinstan thermometers. Mercury thermometers are still widely used for certain scientific applications because of their greater accuracy and working range. Historically, one of the largest releases was from the Colex plant, a lithium-isotope separation plant at Oak Ridge, Tennessee. The plant operated in the 1950s and 1960s. Records are incomplete and unclear, but government commissions have estimated that some two million
National Traffic and Motor Vehicle Safety Act initiated a campaign to prevent motor-vehicle-related injuries. In 1966, passage of the Highway Safety Act and the National Traffic and Motor Vehicle Safety Act authorized the federal government to set and regulate standards for motor vehicles and highways. The Highway Safety Act resulted in the national adoption of the Manual on Uniform Traffic Control Devices, while the National Traffic and Motor Vehicle Safety Act led to the national adoption of the Federal Motor Vehicle Safety Standards. High-Risk Populations Occupant-Protection Systems "Safety belts:" In response to legislation, highly visible law enforcement, and public education, rates of safety belt use nationwide had