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/ Synthesis of Information Related to Highway Practices. Topic 56-18. Policies, Programs, and Practices for Personal Protective Equipment (PPE) https://rip.trb.org/View/2384688 Wed, 29 May 2024 12:23:22 GMT https://rip.trb.org/View/2384688 Transit Vehicle Enhancements to Mitigate Exposure and Strengthen Confidence in Transit for Riders, Drivers and Staff https://rip.trb.org/View/2067955 Mon, 21 Nov 2022 16:26:07 GMT https://rip.trb.org/View/2067955 Pilot Test of a Methodology Observation Survey of Motorcycle Personnel Protective Equipment https://rip.trb.org/View/1749108 Tue, 03 Nov 2020 14:17:19 GMT https://rip.trb.org/View/1749108 Evaluating the Effects of Safety Vest Color on Visual Attention in Simulated Construction Work Zones https://rip.trb.org/View/1672463 Wed, 11 Dec 2019 15:54:29 GMT https://rip.trb.org/View/1672463 Assess the Effectiveness of Type 2 and Type 3 Safety Vest for Day and Night Use https://rip.trb.org/View/1642186 Fri, 02 Aug 2019 07:25:35 GMT https://rip.trb.org/View/1642186