TRIS
http://tris.trb.org is one of the largest databases of published transportation research. TRIS now contains more than 640,000 records of journal articles, conference papers, technical reports, and books on all modes and disciplines of transportation.
TRIS offers users *Simple and advance query screens *The ability to modify searches *Special "Hot Topic" searches *Currency - TRIS is update almost daily *The ability to print, download and e-mail search results in a variety of formats *RSS Feeds to update searches *The ability to share records and searches on a variety of Web 2.0 applications