The National Highway Safety Act
The National Highway Safety Act provides guidelines that states must follow. These guidelines set minimum standards for driver licensing, vehicle registration, highway construction, highway maintenance, traffic laws, and traffic court. This federal law gives each state the authority to set its own laws, such as Graduated Driver Licensing laws, so long as they do not conflict with federal rules and standards. Counties, cities, and towns also pass traffic laws, such as establishing school zones and speed limits on city streets, to make those streets safer for citizens.