Research in Progress (RIP) https://rip.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) Research in Progress (RIP) https://rip.trb.org/Images/PageHeader-wTitle-RIP.jpg https://rip.trb.org/ Develop and Evaluate Long Median Barrier Gate to Assist with Emergency Response https://rip.trb.org/View/2636104 Mon, 08 Dec 2025 09:44:38 GMT https://rip.trb.org/View/2636104 A Guide for Remote Boarding/Deboarding Aircraft Operations https://rip.trb.org/View/2588336 Tue, 12 Aug 2025 09:58:00 GMT https://rip.trb.org/View/2588336 Redesign of Innovative Gate Arms (Ramp Closure Gate) – Phase I https://rip.trb.org/View/2398089 Fri, 28 Jun 2024 09:09:47 GMT https://rip.trb.org/View/2398089 Investigating and Developing a MASH Compliant Contraflow Ramp Closure Gate https://rip.trb.org/View/1873849 Mon, 23 Aug 2021 15:31:26 GMT https://rip.trb.org/View/1873849 Project 21 -N-controlo Surface Demo https://rip.trb.org/View/1364486 Sat, 08 Aug 2015 01:02:00 GMT https://rip.trb.org/View/1364486 Methodology For Applying Safety Treatments To Rail-Highway At-Grade Crossings https://rip.trb.org/View/1234339 Thu, 03 Jan 2013 15:10:44 GMT https://rip.trb.org/View/1234339