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/ Traffic Analysis Roundtable (2027-2031) https://rip.trb.org/View/2724754 Tue, 07 Jul 2026 15:26:30 GMT https://rip.trb.org/View/2724754 Implementing Self-Explaining and Self-Enforcing Roads https://rip.trb.org/View/2712170 Tue, 09 Jun 2026 12:41:56 GMT https://rip.trb.org/View/2712170 Cost-Benefit Analysis of Preemptive Weather-Related Road Closures https://rip.trb.org/View/2689390 Tue, 02 Jun 2026 12:24:05 GMT https://rip.trb.org/View/2689390 The Downstream Infrastructure Impacts of Design Vehicle Selection https://rip.trb.org/View/2558437 Tue, 27 May 2025 16:11:18 GMT https://rip.trb.org/View/2558437 Freeway and Arterial Performance and Safety Analysis with High Resolution Vehicle Trajectory Data https://rip.trb.org/View/2431597 Tue, 17 Sep 2024 17:43:12 GMT https://rip.trb.org/View/2431597 Assessing the Impacts and Challenges of Truck Platooning on Highway Infrastructure in Montana https://rip.trb.org/View/2413944 Tue, 06 Aug 2024 11:05:42 GMT https://rip.trb.org/View/2413944 NCHRP Implementation Support Program. Using Information from CAVs To Enhance Freeway Operational Strategies https://rip.trb.org/View/2406712 Tue, 23 Jul 2024 12:56:41 GMT https://rip.trb.org/View/2406712 Assessment of Safety and Operation Performances of CFIs and DDIs in Utah https://rip.trb.org/View/2394799 Thu, 20 Jun 2024 16:23:48 GMT https://rip.trb.org/View/2394799 Feasibility of a Traffic Operations Center for South Dakota https://rip.trb.org/View/2379665 Tue, 14 May 2024 14:31:05 GMT https://rip.trb.org/View/2379665 Economical Acquisition of Intersection Data to Facilitate CAV Operations Phase II - Implementation https://rip.trb.org/View/2326545 Fri, 26 Jan 2024 16:42:04 GMT https://rip.trb.org/View/2326545 Incorporating Human Factors Guidelines into Transportation Projects, Programs, and Practices https://rip.trb.org/View/2222560 Mon, 31 Jul 2023 16:26:52 GMT https://rip.trb.org/View/2222560 Guide for Self-Explaining Roads in the Context of the Safe System Approach https://rip.trb.org/View/2219014 Tue, 25 Jul 2023 08:50:46 GMT https://rip.trb.org/View/2219014 Highway Safety Manual 2nd Edition (HSM2) Implementation https://rip.trb.org/View/2169804 Wed, 10 May 2023 16:49:53 GMT https://rip.trb.org/View/2169804 Guide for Pedestrian and Bicycle Safety at Alternative Intersections and Interchanges (A.I.I.) https://rip.trb.org/View/2166263 Mon, 01 May 2023 17:59:41 GMT https://rip.trb.org/View/2166263 Research and Support Implementation of Highway Construction and Materials that Reduce Environmental Impacts and Emissions, and Maximize Material Efficiency and Recycling. https://rip.trb.org/View/2093179 Tue, 03 Jan 2023 13:53:38 GMT https://rip.trb.org/View/2093179