ITSL is the oldest transportation library in the USA and the third largest, surpassed only by the U.S. Department of Transportation library in Washington D.C. and the Transportation Library of Northwestern University in Evanston, Illinois.
ITSL is the oldest transportation library in the USA, though no longer the largest. It is by now surpassed in size by the U.S. Department of Transportation library in Washington D.C. and the Transportation Library of Northwestern University in Evanston, Illinois.