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/ Risk Mitigation and Update of Highway Bridge Design Guidance for Vessel Collisions https://rip.trb.org/View/2712182 Tue, 09 Jun 2026 15:51:33 GMT https://rip.trb.org/View/2712182 Investigation of Shear Capacity in Girders with Undersized Transverse Stiffeners https://rip.trb.org/View/2709244 Tue, 02 Jun 2026 15:10:41 GMT https://rip.trb.org/View/2709244 Design and Testing of High-Load Multi-Rotational Disc Bearings for Bridges https://rip.trb.org/View/2669883 Mon, 16 Feb 2026 18:46:02 GMT https://rip.trb.org/View/2669883 Thermal Effects on Concrete Substructure Elements https://rip.trb.org/View/2652209 Tue, 13 Jan 2026 14:58:04 GMT https://rip.trb.org/View/2652209 Shear Wave Velocity Measurements - Phase II https://rip.trb.org/View/2640695 Tue, 16 Dec 2025 09:39:09 GMT https://rip.trb.org/View/2640695 Investigations into Expansion Joint Movement for Integral Abutment of Multi-Span Concrete Bridges https://rip.trb.org/View/2625844 Tue, 18 Nov 2025 08:27:42 GMT https://rip.trb.org/View/2625844 Assessing and Characterizing Geotechnical Soil Strength Parameters for a systematic process to analyze slope stability in accordance with LRFD methods. https://rip.trb.org/View/2431165 Tue, 18 Nov 2025 07:39:44 GMT https://rip.trb.org/View/2431165 Develop Guidance on Drilled Shaft Response to Collision Force https://rip.trb.org/View/2606400 Thu, 02 Oct 2025 09:47:40 GMT https://rip.trb.org/View/2606400 Clay and Shale LRFD Design Criteria for Drilled Shaft Foundations https://rip.trb.org/View/2604567 Mon, 29 Sep 2025 16:35:38 GMT https://rip.trb.org/View/2604567 Live Load Distribution Factors for Straight Steel I-Girder Bridges https://rip.trb.org/View/2558367 Thu, 29 May 2025 13:11:35 GMT https://rip.trb.org/View/2558367 Service III Limit State for Tension in Prestressed Concrete Bridge https://rip.trb.org/View/2558377 Thu, 29 May 2025 12:43:38 GMT https://rip.trb.org/View/2558377 Design and Analysis of Bridge Foundations for Redundancy https://rip.trb.org/View/2558400 Wed, 28 May 2025 10:00:22 GMT https://rip.trb.org/View/2558400 Guide for Culvert and Storm Drain Rehabilitation https://rip.trb.org/View/2558411 Tue, 27 May 2025 20:50:33 GMT https://rip.trb.org/View/2558411 RES2025-02: Use of Confinement Reinforcement in Prestressed Concrete Beams to Improve Resistance to Impacts from Over Height Loads https://rip.trb.org/View/2437327 Mon, 30 Sep 2024 15:39:09 GMT https://rip.trb.org/View/2437327 Develop Standardized LRFD Design Methods for Ancillary Highway Structures https://rip.trb.org/View/2420079 Thu, 22 Aug 2024 17:10:40 GMT https://rip.trb.org/View/2420079