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/ Evaluation of Asphalt Rejuvenators on Asphalt Mixtures with High RAP https://rip.trb.org/View/2768413 Wed, 26 Aug 2026 17:04:22 GMT https://rip.trb.org/View/2768413 Determination of the Surface Oxidation of Pavement Preservation Treatments https://rip.trb.org/View/2761616 Mon, 17 Aug 2026 11:05:30 GMT https://rip.trb.org/View/2761616 Continuous and Rapid Detection Methods for Segregation in Asphalt Mixture Paving https://rip.trb.org/View/2734857 Thu, 23 Jul 2026 07:25:06 GMT https://rip.trb.org/View/2734857 Effect of Using RAP on Gravel Roads https://rip.trb.org/View/2720399 Tue, 30 Jun 2026 15:25:11 GMT https://rip.trb.org/View/2720399 The Use of Recycled Plastic in Asphalt Pavements - Phase II https://rip.trb.org/View/2689392 Tue, 02 Jun 2026 12:25:00 GMT https://rip.trb.org/View/2689392 The Use of Recycled Plastic in Concrete Pavements - Phase II https://rip.trb.org/View/2685709 Tue, 02 Jun 2026 12:23:14 GMT https://rip.trb.org/View/2685709 Evaluate Standard vs Blended PG Binders Performance in NM https://rip.trb.org/View/2704031 Wed, 20 May 2026 11:10:25 GMT https://rip.trb.org/View/2704031 SPR-5027: Evaluation of Recycled Concrete Pavement (RCP) for Base and Subbase Layers https://rip.trb.org/View/2698666 Wed, 06 May 2026 15:26:33 GMT https://rip.trb.org/View/2698666 Field Performance Study of Plastics-Amended Asphalt for Roadway Construction https://rip.trb.org/View/2696020 Thu, 23 Apr 2026 16:48:47 GMT https://rip.trb.org/View/2696020 Innovative Materials for Improved Roadway Mobility and Drainage Efficiency https://rip.trb.org/View/2677558 Wed, 04 Mar 2026 13:53:43 GMT https://rip.trb.org/View/2677558 Ladle Furnace Slag Properties When Blended with Dolomitic Underutilized Quarry Materials https://rip.trb.org/View/2677554 Wed, 04 Mar 2026 09:16:47 GMT https://rip.trb.org/View/2677554 Evaluation of Hamburg Wheel Tracking Test (HWTT) for Rutting Resistance Assessment https://rip.trb.org/View/2671980 Wed, 18 Feb 2026 11:14:14 GMT https://rip.trb.org/View/2671980 Use of “Plazrok” Aggregate to Produce Durable Grade 3.0 and 4.0 Concrete https://rip.trb.org/View/2652729 Tue, 13 Jan 2026 16:28:22 GMT https://rip.trb.org/View/2652729 Assessing the Durability and Long-Term Performance of Rejuvenated Asphalt Mixes with RAP https://rip.trb.org/View/2646944 Mon, 05 Jan 2026 23:09:53 GMT https://rip.trb.org/View/2646944 Asphalt 3D Printing for On-Demand Transportation Infrastructure Construction and Repair https://rip.trb.org/View/2646934 Mon, 05 Jan 2026 22:19:44 GMT https://rip.trb.org/View/2646934