Send a comment on this item to LII: Send a comment on this item to LII staff, who on weekdays will usually reply within 24 hours. Trip: A National Transportation Research Group Trip, a nonprofit organization supported by insurance companies and other businesses, "promotes transportation policies that relieve traffic congestion, improve air quality, make highway travel safer and enhance economic productivity." Its site features research reports, news releases, and state and national information about roads and traffic conditions. Also includes links to sites relating to the 50th anniversary in 2006 of the Interstate Highway System. http://www.tripnet.org Asterisk * indicates required field. Your Name Your Email Address * We will not sell or provide your email address to anyone else. Comment * Enter the verification code as it is shown in the box below. This helps prevent automated submissions. *