The Governors Highway Safety Association

is a nonprofit association representing the highway safety offices of states, territories, the District of Columbia and Puerto Rico. GHSA provides leadership and representation for the states and territories to improve traffic safety, influence national policy and enhance program management. Its members are appointed by their Governors to administer federal and state highway safety funds and implement state highway safety plans. Image and text from the GHSA website.

You'll find cell phone, seat belt, mature driving laws state by state.