America's highways are becoming a little more health-friendly\Mbut not because of more rigorous speed limits or seat-belt laws. Last month, the Centers for Disease Control and Prevention, the US Food and Drug Administration, and the National Cancer Institute launched a nationwide effort to replace more than 4000 billboards touting tobacco products with new ones that discourage tobacco use and promote good health.
Stephenson J. Billboards for Better Health. JAMA. 1999;281(19):1784. doi:10.1001/jama.281.19.1784-JHA90003-2-1