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/ Examining Transportation Infrastructure Investments at Large Employment Hubs for Improving Workers’ Travel: A Case Study of the Denver International Airport https://rip.trb.org/View/2557003 Mon, 26 May 2025 13:04:27 GMT https://rip.trb.org/View/2557003 Synthesis of Information Related to Highway Practices. Topic 56-04. Practices on Mental Health, Suicide Prevention, and Addiction Mitigation in Construction and Maintenance https://rip.trb.org/View/2384704 Fri, 31 May 2024 20:22:03 GMT https://rip.trb.org/View/2384704 Utah Transit Authority, Suicide Prevention Research and Demonstration Project https://rip.trb.org/View/2096559 Fri, 13 Jan 2023 14:49:09 GMT https://rip.trb.org/View/2096559 Listening to Passengers: Data-Driven Investigations of Public Perceptions at Transportation Hubs to Improve Equity and Accessibility of Underrepresented Populations https://rip.trb.org/View/2008000 Tue, 16 Aug 2022 18:07:12 GMT https://rip.trb.org/View/2008000 Impact of Rail Trespasser Fatalities & Suicide on Mental Health and Safety Culture of Rail Transportation Workers https://rip.trb.org/View/1982054 Wed, 15 Jun 2022 15:42:01 GMT https://rip.trb.org/View/1982054 Trespasser and Suicide Prevention Training for Rail Transportation Workers https://rip.trb.org/View/1881400 Wed, 29 Sep 2021 20:40:18 GMT https://rip.trb.org/View/1881400 Design of a Hub-based Intermodal Logistics System for Multi-regional Commodity Flow https://rip.trb.org/View/1232027 Thu, 03 Jan 2013 14:30:37 GMT https://rip.trb.org/View/1232027