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/ 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 SPR-4924: Numerical Modeling for Assessment and Evaluation of New and Retrofitted Bridge Rails Under Impact Load https://rip.trb.org/View/2434101 Wed, 25 Sep 2024 09:23:07 GMT https://rip.trb.org/View/2434101 Experimental Evaluation of Strengthening Methods for Bridge Piers Against Vehicular Collision https://rip.trb.org/View/2369297 Mon, 03 Jun 2024 14:37:53 GMT https://rip.trb.org/View/2369297 Development of Critical Impact Point and Impact Angle Guidance for the Manual for Assessing Safety Hardware (MASH) https://rip.trb.org/View/2381727 Tue, 21 May 2024 16:42:58 GMT https://rip.trb.org/View/2381727 Evaluation of GFRP Spirals in Corrosion Resistant Concrete Piles https://rip.trb.org/View/2250474 Tue, 19 Sep 2023 07:48:52 GMT https://rip.trb.org/View/2250474 Fiber-Reinforced Concrete Traffic Railings for Impact Loading, Phase II - Slip Forming https://rip.trb.org/View/2175540 Mon, 22 May 2023 13:26:25 GMT https://rip.trb.org/View/2175540 Fracture Resistance of Cold Bent Steel https://rip.trb.org/View/2100877 Wed, 18 Jan 2023 11:17:26 GMT https://rip.trb.org/View/2100877 Protecting Critical Civil Infrastructure Against Impact from Commercial Vehicles – Phase 3, A Systems Based Approach Including Fire https://rip.trb.org/View/1943999 Mon, 25 Apr 2022 19:28:11 GMT https://rip.trb.org/View/1943999 Develop Countermeasure Strategies for Protecting Bridge Girders Against Overheight Vehicles Impact https://rip.trb.org/View/1867130 Mon, 19 Jul 2021 21:15:30 GMT https://rip.trb.org/View/1867130 Protecting Critical Civil Infrastructure Against Impact from Commercial Vehicles – Phase II, A Systems Based Approach https://rip.trb.org/View/1777950 Fri, 26 Feb 2021 11:11:32 GMT https://rip.trb.org/View/1777950 MnDOT Haul/Detour Routes – Impacts on local roads https://rip.trb.org/View/1764601 Thu, 21 Jan 2021 16:22:56 GMT https://rip.trb.org/View/1764601 Assessment and Repair of Prestressed Bridge Girders Subjected to Over-Height Truck Impacts (OHTI) https://rip.trb.org/View/1738102 Thu, 10 Sep 2020 10:54:48 GMT https://rip.trb.org/View/1738102 Protecting Critical Civil Infrastructure Against Impact from Commercial Vehicles – Phase I, Year 2 https://rip.trb.org/View/1583347 Thu, 07 Feb 2019 16:33:27 GMT https://rip.trb.org/View/1583347 Protecting Critical Civil Infrastructure Against Impact from Commercial Vehicles - Phase I https://rip.trb.org/View/1524134 Tue, 17 Jul 2018 08:38:04 GMT https://rip.trb.org/View/1524134 Dynamic Evaluation and Design of Prefabricated Concrete Bridge Rails https://rip.trb.org/View/1482180 Thu, 07 Sep 2017 16:03:03 GMT https://rip.trb.org/View/1482180