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/ COMPARISON OF LIGHT INTENSITIES OF VARIOUS LOCOMOTIVE HEADLAMPS AND VISUAL RANGE BY HEADLAMP ILLUMINATION https://trid.trb.org/View/4881 Fri, 08 Jul 1994 00:00:00 GMT https://trid.trb.org/View/4881 A COMPARATIVE INVESTIGATION ON THE CONSPICUITY OF THREE RAILWAY SHUNTING LANTERNS https://trid.trb.org/View/169778 Wed, 28 Oct 1981 00:00:00 GMT https://trid.trb.org/View/169778 LIGHT ADAPTATION PROBLEMS WHEN LEAVING A SUBWAY TUNNEL https://trid.trb.org/View/169780 Wed, 28 Oct 1981 00:00:00 GMT https://trid.trb.org/View/169780 YARD LIGHTING SYSTEMS https://trid.trb.org/View/38396 Wed, 27 Aug 1975 00:00:00 GMT https://trid.trb.org/View/38396