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/ Evaluate the Safety Effects of Multiple Vehicle Synchronized Warning Lights in ODOT Work Zones https://rip.trb.org/View/2701274 Tue, 12 May 2026 10:43:15 GMT https://rip.trb.org/View/2701274 Feasibility of LED Solar Street Lighting https://rip.trb.org/View/2486973 Fri, 18 Jul 2025 09:25:19 GMT https://rip.trb.org/View/2486973 Non-Contact Energy Harvesting for Rural Grade Crossings – Year 3 https://rip.trb.org/View/2574027 Mon, 14 Jul 2025 19:06:39 GMT https://rip.trb.org/View/2574027 PedX: Automation for Safer Pedestrian Street Lighting at Intersections https://rip.trb.org/View/2440016 Sun, 13 Oct 2024 08:23:12 GMT https://rip.trb.org/View/2440016 LED Applications on Traffic Control Devices https://rip.trb.org/View/1957081 Fri, 27 May 2022 11:23:28 GMT https://rip.trb.org/View/1957081 Guidelines for Solid-State Roadway Lighting https://rip.trb.org/View/1864201 Mon, 05 Jul 2021 17:42:47 GMT https://rip.trb.org/View/1864201 LED Traffic Signal Lifespan and Replacement Assessment https://rip.trb.org/View/1844082 Tue, 30 Mar 2021 08:26:01 GMT https://rip.trb.org/View/1844082 Development of Automated Roadway Lighting Diagnosis Tools for Nighttime Traffic Safety Improvement, Phase II https://rip.trb.org/View/1756015 Sat, 05 Dec 2020 18:29:22 GMT https://rip.trb.org/View/1756015 Guide to the Contextual Application of Overhead Lighting on Highways https://rip.trb.org/View/1707197 Wed, 20 May 2020 18:48:43 GMT https://rip.trb.org/View/1707197 LED Traffic Signal Luminosity Study https://rip.trb.org/View/1704620 Mon, 04 May 2020 15:49:00 GMT https://rip.trb.org/View/1704620 Research for AASHTO Standing Committee on Highways. Task 425. Emerging LED Technologies and Use within Tunnels https://rip.trb.org/View/1651885 Tue, 17 Sep 2019 10:18:32 GMT https://rip.trb.org/View/1651885 Development of Multi-Rotor-UAV-based Rail Track Irregularity Monitoring and Measuring Platform with Image and LIDAR Sensors https://rip.trb.org/View/1602482 Sat, 27 Apr 2019 16:06:56 GMT https://rip.trb.org/View/1602482 Evaluation of Light Emitting Surface (LES) and Light Emitting Diode (LED) Roadway Luminaires https://rip.trb.org/View/1589327 Wed, 27 Feb 2019 16:43:04 GMT https://rip.trb.org/View/1589327 Ecological Design Rules for Roadway Lighting https://rip.trb.org/View/1570837 Fri, 30 Nov 2018 12:50:08 GMT https://rip.trb.org/View/1570837 Project 18 - Acquisition Distance of LED Based Runway Closure Lighting https://rip.trb.org/View/1549396 Fri, 21 Sep 2018 18:24:09 GMT https://rip.trb.org/View/1549396