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/ Impact of Noise Barriers on Residential Property Values https://rip.trb.org/View/2652033 Fri, 09 Jan 2026 09:12:41 GMT https://rip.trb.org/View/2652033 Framework for participatory evaluation of greenery screens in environmental justice communities https://rip.trb.org/View/2420067 Thu, 22 Aug 2024 16:05:52 GMT https://rip.trb.org/View/2420067 Field Evaluation of Lightweight Soundwall Panel Systems https://rip.trb.org/View/2314003 Fri, 22 Dec 2023 11:11:18 GMT https://rip.trb.org/View/2314003 Bio-Inspired Solutions for Jersey and Road Noise Barriers: Exploring 3D Printing as Alternative Precast Technology https://rip.trb.org/View/2250458 Mon, 18 Sep 2023 22:12:22 GMT https://rip.trb.org/View/2250458 Effectiveness of Short Solid Barriers to Reduce Noise Generated by Different Types of Highway Vehicles https://rip.trb.org/View/2118538 Wed, 15 Feb 2023 10:15:24 GMT https://rip.trb.org/View/2118538 Acoustic Effectiveness of Vinyl Fence Noise Walls https://rip.trb.org/View/1762184 Wed, 06 Jan 2021 11:45:43 GMT https://rip.trb.org/View/1762184 Acoustical Standard for Noise Walls https://rip.trb.org/View/1650696 Wed, 11 Sep 2019 13:58:09 GMT https://rip.trb.org/View/1650696 Research for the AASHTO Committee on Environment and Sustainability. Task 106. Highway Noise and Historic Properties: A National Review of Effects and Mitigation Practices https://rip.trb.org/View/1489874 Mon, 27 Nov 2017 19:44:05 GMT https://rip.trb.org/View/1489874 National Cooperative Highway Research Program (NCHRP); Special Studies, Reviews, Conferences, and Special Projects https://rip.trb.org/View/1415608 Wed, 06 Jul 2016 13:34:36 GMT https://rip.trb.org/View/1415608 Strength of Unbonded Post-Tensioned Walls https://rip.trb.org/View/1320623 Wed, 20 Aug 2014 01:00:37 GMT https://rip.trb.org/View/1320623