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 Water-Cementitious Material Ratio as Acceptance Parameter for Freshly Placed Concrete https://rip.trb.org/View/2671983 Wed, 18 Feb 2026 11:20:18 GMT https://rip.trb.org/View/2671983 Develop and Demonstrate an Evaluation Process for Acceptance of Additives for Use in Forensic Analysis in Hot Mix Asphalt https://rip.trb.org/View/2666836 Tue, 10 Feb 2026 14:43:18 GMT https://rip.trb.org/View/2666836 Human Factors and Acceptance Framework for Airport Autonomous Systems https://rip.trb.org/View/2588332 Tue, 12 Aug 2025 10:16:48 GMT https://rip.trb.org/View/2588332 SPR-5023: Understanding and Shaping Driver Behavior and Public Perception at Reduced Conflict Intersections (RCls) https://rip.trb.org/View/2577104 Thu, 17 Jul 2025 16:00:45 GMT https://rip.trb.org/View/2577104 Incorporating Psychographic Factors to Assess the Impact of Cybersecurity Breaches on Connected and Automated Vehicles and Road Safety https://rip.trb.org/View/2549183 Mon, 05 May 2025 16:14:48 GMT https://rip.trb.org/View/2549183 SPR-4932: Portable Driving Simulation Platform for Innovative Intersections https://rip.trb.org/View/2410441 Tue, 30 Jul 2024 11:41:25 GMT https://rip.trb.org/View/2410441 Guidelines for Authorizing, Implementing, and Operating Automated Traffic Enforcement Programs https://rip.trb.org/View/2394423 Wed, 19 Jun 2024 15:22:09 GMT https://rip.trb.org/View/2394423 Guidelines for the Selection of Performance-Related Tests for the Acceptance of Preservation Treatments https://rip.trb.org/View/2361977 Mon, 01 Apr 2024 15:55:15 GMT https://rip.trb.org/View/2361977 On the Role of Perceived Safety Concerns on Public Acceptance Behavior of Autonomous Vehicles https://rip.trb.org/View/2292666 Tue, 21 Nov 2023 18:22:00 GMT https://rip.trb.org/View/2292666 Streamline and Document Construction Project Closeout Process https://rip.trb.org/View/2244510 Thu, 14 Sep 2023 08:49:30 GMT https://rip.trb.org/View/2244510 SPR-4827: Develop a Performance-Related QA Testing Method for Accepting MSE Wall Coarse Aggregate Reinforced Backfill Compaction Acceptance https://rip.trb.org/View/2238846 Thu, 31 Aug 2023 16:44:56 GMT https://rip.trb.org/View/2238846 RES2024-06: Early Age Concrete Acceptance https://rip.trb.org/View/2233695 Fri, 25 Aug 2023 14:44:26 GMT https://rip.trb.org/View/2233695 A Blueprint for Incorporating ORAT into Airports https://rip.trb.org/View/2226014 Thu, 10 Aug 2023 09:18:17 GMT https://rip.trb.org/View/2226014 Lightweight Deflectometer (LWD) Assessment for Quality Assurance https://rip.trb.org/View/2151380 Wed, 12 Apr 2023 19:38:51 GMT https://rip.trb.org/View/2151380 Continuation of CAV Work https://rip.trb.org/View/2039855 Wed, 12 Oct 2022 12:57:54 GMT https://rip.trb.org/View/2039855