Transport Research International Documentation (TRID) https://trid.trb.org/ en-us Copyright © 2026. National Academy of Sciences. All rights reserved. http://blogs.law.harvard.edu/tech/rss tris-trb@nas.edu (Bill McLeod) tris-trb@nas.edu (Bill McLeod) Transport Research International Documentation (TRID) https://trid.trb.org/Images/PageHeader-wTitle.jpg https://trid.trb.org/ ON THE ANALYSIS OF RAIL SWITCH INTERLOCK https://trid.trb.org/View/79368 Thu, 12 Oct 1978 00:00:00 GMT https://trid.trb.org/View/79368 QUALITY OF TRACK AS A CONSTRAINT ON THE SPEED OF TRAINS https://trid.trb.org/View/53219 Thu, 04 Aug 1977 00:00:00 GMT https://trid.trb.org/View/53219 SIMULATION METHOD OF PREDICTING SINGLE REPLACEMENTS OF RAILROAD SLEEPERS https://trid.trb.org/View/67239 Wed, 27 Apr 1977 00:00:00 GMT https://trid.trb.org/View/67239 ATTEMPT TO DEFINE THE INTERRELATIONSHIP BETWEEN A RAILROAD TRACK AND THE TYPE OF ITS SUBGRADE https://trid.trb.org/View/24906 Fri, 16 Jan 1976 00:00:00 GMT https://trid.trb.org/View/24906