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/ Evaluating Construction Workforce Conditions and Their Effects on Productivity and Project Scheduling https://rip.trb.org/View/2712203 Wed, 10 Jun 2026 11:14:16 GMT https://rip.trb.org/View/2712203 Guide to Analyzing Economic Impact of Changes in Air Service Connectivity https://rip.trb.org/View/2588337 Tue, 12 Aug 2025 09:53:38 GMT https://rip.trb.org/View/2588337 Impact of Recycling Agent Introduction Method on Plant-Produced Asphalt Mixtures https://rip.trb.org/View/2558397 Wed, 28 May 2025 10:09:46 GMT https://rip.trb.org/View/2558397 Evaluating Portland Limestone Cement Alternative for Type III Cement to Better Prepare GDOT for Production Changes in the U.S. Cement Mills https://rip.trb.org/View/2508938 Tue, 11 Feb 2025 15:39:36 GMT https://rip.trb.org/View/2508938 Comprehensive assessment of alternative fueling system supply chains in the heavy duty trucking sector https://rip.trb.org/View/2495007 Fri, 31 Jan 2025 18:42:13 GMT https://rip.trb.org/View/2495007 IoT-Driven Digital Twin Framework for the Design and Fabrication of Precast Elements https://rip.trb.org/View/2491026 Wed, 22 Jan 2025 11:38:38 GMT https://rip.trb.org/View/2491026 Non-Contact Energy Harvesting for Rural Grade Crossings – Year 2 https://rip.trb.org/View/2405273 Mon, 22 Jul 2024 08:06:46 GMT https://rip.trb.org/View/2405273 Develop an Interactive Statewide Production Rate Estimation Tool for Reliable Contract Time Determination https://rip.trb.org/View/2255820 Wed, 27 Sep 2023 14:01:03 GMT https://rip.trb.org/View/2255820 A Scheduling Assistant Toolkit for GDOT’s Effective Planning of Transportation Projects https://rip.trb.org/View/2046781 Tue, 18 Oct 2022 13:43:31 GMT https://rip.trb.org/View/2046781 Electric Aviation Infrastructure Assessment https://rip.trb.org/View/1906841 Thu, 27 Jan 2022 18:54:18 GMT https://rip.trb.org/View/1906841 Methane Energy Generation Project Phase 4 https://rip.trb.org/View/1906169 Wed, 26 Jan 2022 11:49:04 GMT https://rip.trb.org/View/1906169 Transportation Research Related to COVID-19. Telecommuting, Remote Work, and Hybrid Schedules: Managing the Shift to a Flexible Work Future https://rip.trb.org/View/1842755 Wed, 24 Mar 2021 18:10:32 GMT https://rip.trb.org/View/1842755 Energy Harvester Tie for Serving the Needs of the Railroad Industry to Access Electric Power in Remote Locations https://rip.trb.org/View/1762963 Thu, 07 Jan 2021 22:55:40 GMT https://rip.trb.org/View/1762963 Development of Holistic Methodologies for Improving Asphalt Mix Durability Year 2 https://rip.trb.org/View/1742794 Mon, 05 Oct 2020 13:59:02 GMT https://rip.trb.org/View/1742794 SPR-4542: Alternative Strategies for Roadway Work Zone Safety and Productivity https://rip.trb.org/View/1726015 Wed, 05 Aug 2020 14:58:47 GMT https://rip.trb.org/View/1726015