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/ Improving Traveler Experience Via Alternatives to Roadway/Railway Grade Crossings https://rip.trb.org/View/2646961 Tue, 06 Jan 2026 17:10:14 GMT https://rip.trb.org/View/2646961 Optimizing Signal Timing Through New Technologies https://rip.trb.org/View/2640688 Tue, 16 Dec 2025 09:06:42 GMT https://rip.trb.org/View/2640688 Developing a Guideline for Selecting Appropriate Treatment Options for Approaches with Two Left Turn Lane https://rip.trb.org/View/2601432 Thu, 18 Sep 2025 00:53:20 GMT https://rip.trb.org/View/2601432 Enhancing Traffic Delay Prediction Utilizing Data-Driven Techniques https://rip.trb.org/View/2485374 Fri, 03 Jan 2025 16:08:01 GMT https://rip.trb.org/View/2485374 Impact of All-Way Stop Control Intersections Along Rural and Suburban Corridors https://rip.trb.org/View/2452869 Fri, 15 Nov 2024 15:23:52 GMT https://rip.trb.org/View/2452869 Assessing Ohio's Approach to Clearing Utilities on Highway Projects Process Improvements https://rip.trb.org/View/2431341 Tue, 17 Sep 2024 14:27:47 GMT https://rip.trb.org/View/2431341 Integrating Progression Band and Delay Optimization for Arterials with Unbalanced Directional Traffic https://rip.trb.org/View/2343710 Thu, 22 Feb 2024 15:54:19 GMT https://rip.trb.org/View/2343710 Determine Effectiveness of Construction Management Plans https://rip.trb.org/View/2255827 Wed, 27 Sep 2023 14:48:24 GMT https://rip.trb.org/View/2255827 Evaluation of MDOT's Methodology for Estimating Work Zone User Delay Times https://rip.trb.org/View/2122507 Mon, 31 Jul 2023 11:40:47 GMT https://rip.trb.org/View/2122507 SPR-4710: INDOT Project Change Orders – Root Causes and Recommendations https://rip.trb.org/View/2059472 Fri, 11 Nov 2022 09:35:55 GMT https://rip.trb.org/View/2059472 Prioritizing People - Mixed Equilibrium Assignment for AV Based on Occupancy (Phase II) https://rip.trb.org/View/1881798 Mon, 04 Oct 2021 11:52:13 GMT https://rip.trb.org/View/1881798 Evaluation of Advanced Vehicle & Communication Technologies through Traffic Microsimulation (Project I5) https://rip.trb.org/View/1868846 Tue, 27 Jul 2021 09:19:05 GMT https://rip.trb.org/View/1868846 Prioritization Procedure for Proposed Road-Rail Grade Separation Projects along Specific Rail Corridors https://rip.trb.org/View/1741493 Tue, 29 Sep 2020 14:59:42 GMT https://rip.trb.org/View/1741493 Evaluation of the Driveway Assistance Device (DAD) Systems in One-Lane Two-Way Work Zone https://rip.trb.org/View/1741272 Fri, 25 Sep 2020 15:18:31 GMT https://rip.trb.org/View/1741272 Operational Applications of Signalized Offset T-Intersections https://rip.trb.org/View/1723550 Thu, 23 Jul 2020 13:07:55 GMT https://rip.trb.org/View/1723550