Research in Progress (RIP) https://rip.trb.org/ en-us Copyright © 2024. 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/ Next-Generation Permeable Pavement for Enhanced Durability and Functionality https://rip.trb.org/View/2291281 Wed, 15 Nov 2023 17:12:35 GMT https://rip.trb.org/View/2291281 Field Study to Determine Salt Usage Efficiency and Transport to the Surrounding Environment on Two Pavement Types https://rip.trb.org/View/2255649 Mon, 25 Sep 2023 11:38:36 GMT https://rip.trb.org/View/2255649 HFST Review of Service Life https://rip.trb.org/View/2240235 Thu, 07 Sep 2023 09:11:08 GMT https://rip.trb.org/View/2240235 Friction Enhancements to Asphalt Pavement Surfaces https://rip.trb.org/View/1992151 Fri, 08 Jul 2022 16:05:44 GMT https://rip.trb.org/View/1992151 Developing Lower Modulus Polymer Resin Binder Systems Specifications for High Friction Surface Treatment on Asphalt Pavements in Nevada (NDOT 302-19-803) https://rip.trb.org/View/1991151 Wed, 06 Jul 2022 17:11:16 GMT https://rip.trb.org/View/1991151 Develop Cost Effective Design and Rehabilitation Strategies for Permeable Friction Courses https://rip.trb.org/View/1879836 Thu, 23 Sep 2021 10:33:33 GMT https://rip.trb.org/View/1879836 Open-Graded Friction Courses Suitable for Suburban Environments https://rip.trb.org/View/1765361 Wed, 12 May 2021 10:31:26 GMT https://rip.trb.org/View/1765361 RES2019-25: Improving Winter Maintenance for Open Graded Friction Course (OGFC) Pavements in Tennessee https://rip.trb.org/View/1851965 Tue, 11 May 2021 18:11:25 GMT https://rip.trb.org/View/1851965 Long-Lasting Open Graded Friction Course (OGFC) for Surfacing New Mexico Roads https://rip.trb.org/View/1708239 19%) to increase permeability, which allows faster removal of roadway surface moisture. Traditional dense graded pavement are designed with air void content at 5.5% as well as to enhance the International Roughness Index (IRI) and Skid Resistance. Currently, NMDOT uses only one type of performance grade binder: PG 70-28+ (or rubberized 70-28R+) throughout NM, irrespective of climatic/environmental conditions where PG selection should be location/climate specific. There is a national trend where state DOTs are moving towards performance-based mix designs; whereas currently, the NMDOT uses only a volumetric method for designing OGFC. Recently OGFC is suspected to play significant roles in statewide top-down cracking problems in New Mexico, because the high air content in OGFC leads to accelerated aging due to higher accessibility of air, which results in brittle OGFC that promotes initial cracking within the thin OGFC layer which then propagates into the lower hot mix asphalt (HMA) layers. The main objectives of this research are to: (1) Examine whether NMDOT can utilize alternative binder types in OGFC. (2) Determine if NMDOT can add additional performance testing requirements for OGFC mix designs. The study will develop a performance based OGFC specification. In addition to drain down, permeability, and abrasion tests, researchers will develop inter-phase shear (specialized test), aging, moisture susceptibility, and semicircular-notched type fracture tests.]]> Fri, 22 May 2020 15:50:29 GMT https://rip.trb.org/View/1708239 Validation of the PFC Underdrain to Remove Standing Water on Pavement Surface https://rip.trb.org/View/1652663 Wed, 18 Sep 2019 15:30:54 GMT https://rip.trb.org/View/1652663 SPR-4300: Investigation of Durability and Performance of High Friction Surface Treatment https://rip.trb.org/View/1513445 Wed, 23 May 2018 14:28:22 GMT https://rip.trb.org/View/1513445 Pavement Surface Properties Consortium – Managing the Pavement Properties for Improved Safety https://rip.trb.org/View/1404718 Fri, 22 Apr 2016 09:21:27 GMT https://rip.trb.org/View/1404718 Exploration of Novel Multifunctional Open Graded Friction Courses (MOGFC) for In-situ Highway Runoff Treatment https://rip.trb.org/View/1366465 Fri, 21 Aug 2015 01:01:03 GMT https://rip.trb.org/View/1366465