TRB is pleased to announce that TRID, the TRIS and ITRD Database, reached one million records in late 2012. This achievement happened sooner than anticipated due to the addition of the ARRB Group’s ATRI Database to TRID in the fall of 2012. TRID’s one millionth record added to the system references TCRP Legal Research Digest 40: Legal Issues Involving Surety for Public Transportation Projects.

This landmark had been decades in the making. TRB’s TRIS Database, which is the predecessor to TRID, started as a paper-based system in 1932, then moved to a mainframe environment in the 1960s, and transitioned to a web environment in the 2000s.

Since TRID’s launch at the 2011 TRB 90th Annual Meeting, it has received more than three million visits.

TRID is an integrated database that combines the records from TRB's Transportation Research Information Services (TRIS) Database, the OECD's Joint Transport Research Centre’s International Transport Research Documentation (ITRD) Database, and ARRB Group’s ATRI Database. TRID also receives bibliographic records from major university transportation libraries, known as TLIB.

TRID covers all modes and disciplines of transportation and provides access to more than 1,002,000 records of transportation research worldwide. More than 90,000 records contain links to free or fee-based full-text documents.

Visit, learn more about, and use TRID today!