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/ Laboratory Evaluation of Fresh and Hardened Concrete Comprising Type IP Portland-Pozzolan Cement https://rip.trb.org/View/2263680 Fri, 06 Oct 2023 16:55:08 GMT https://rip.trb.org/View/2263680 Enabling GLOSA through Domain Knowledge Aware SPAT Prediction and Queue Length Aware Trajectory Optimization https://rip.trb.org/View/2250699 Thu, 21 Sep 2023 14:18:54 GMT https://rip.trb.org/View/2250699 Showcasing and Rodeo of Emerging Concrete Technologies at TFHRC https://rip.trb.org/View/2077946 Tue, 06 Dec 2022 09:48:39 GMT https://rip.trb.org/View/2077946 Design of 3D Printable Eco-Concrete by Utilizing Rheology Modifiers for Sustainable Infrastructure https://rip.trb.org/View/1948649 Mon, 09 May 2022 05:49:01 GMT https://rip.trb.org/View/1948649 Research for AASHTO Standing Committee on Highways. Task 405. Reevaluation of the Perception and Reaction Time and Deceleration Rates for Stopping https://rip.trb.org/View/1877228 Tue, 07 Sep 2021 13:36:44 GMT https://rip.trb.org/View/1877228 Development of the 8th Edition of AASHTO's A Policy on the Geometric Design of Highways and Streets (Green Book) https://rip.trb.org/View/1707200 Wed, 20 May 2020 18:31:24 GMT https://rip.trb.org/View/1707200 Research for AASHTO Standing Committee on Highways. Task 398. Development of Performance-Based Geometric Design Content for the Next Edition of the AASHTO Green Book https://rip.trb.org/View/1673343 Tue, 17 Dec 2019 12:14:50 GMT https://rip.trb.org/View/1673343 Update of the Policy on Geometric Design of Highways and Streets Guidance on Acceleration/Deceleration and Stopping Sight Distance Criteria https://rip.trb.org/View/1628617 Sat, 08 Jun 2019 05:14:54 GMT https://rip.trb.org/View/1628617 An Update of the Green Book Design Vehicles Requirements https://rip.trb.org/View/1516155 Mon, 18 Jun 2018 19:33:12 GMT https://rip.trb.org/View/1516155 Testing MS Sedco INTERSECTOR Radar Detectors for Car/Bike Differentiation https://rip.trb.org/View/1441872 Wed, 04 Jan 2017 10:55:14 GMT https://rip.trb.org/View/1441872 Sustainability FAA Greening Initiative https://rip.trb.org/View/1369312 Fri, 18 Sep 2015 15:39:42 GMT https://rip.trb.org/View/1369312 Greening Initiative https://rip.trb.org/View/1363934 Wed, 05 Aug 2015 01:00:41 GMT https://rip.trb.org/View/1363934 Sustainable Transportation for Tourism: Indicators & Standards, Green Certification Programs, and Simulation Modeling (Part 2) https://rip.trb.org/View/1359732 Thu, 02 Jul 2015 01:00:44 GMT https://rip.trb.org/View/1359732 Sustainable Transportation for Tourism: Indicators & Standards, Green Certification Programs, and Simulation Modeling (Part 3) https://rip.trb.org/View/1359726 Thu, 02 Jul 2015 01:00:39 GMT https://rip.trb.org/View/1359726 Port Sustainability Audit https://rip.trb.org/View/1357364 Fri, 12 Jun 2015 01:01:14 GMT https://rip.trb.org/View/1357364