The fourth Transport Research Arena, TRA 2012 will take place in Athens, Greece, from 23 – 26 April 2012. This edition of TRA will for the first time, deal extensively with all surface transport modes - road, rail and waterborne, and underline the interlinks between these transport modes. The Programme Committee is now inviting submissions of abstracts for oral or poster presentations at the TRA conference. Abstracts should relate to one of the conference topics, which are grouped into 6 pillars that cover all areas of surface transport. Please consult the TRA website for detailed instructions on the submission procedure. Deadline for submission is midnight on 15 April 2011. First Announcement (.pdf).