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. TRIS Online The TRIS (Transportation Research Information Services) database contains "over half a million records of references to books, technical reports, conference proceedings, journal articles and on-going research in the field of transportation." Produced and maintained by the Transportation Research Board at the National Academy of Sciences. http://ntlsearch.bts.gov/tris/ 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. *