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/ Update to ACRP Report 49: Collaborative Airport Capital Planning Handbook https://rip.trb.org/View/2673006 Mon, 23 Feb 2026 19:03:26 GMT https://rip.trb.org/View/2673006 Handbook for Pavement Design, Construction, and Management https://rip.trb.org/View/2555869 Tue, 20 May 2025 14:27:19 GMT https://rip.trb.org/View/2555869 Update ACRP Report 84: Guidebook for Preparing Airport Emissions Inventories for State Implementation Plans https://rip.trb.org/View/2413894 Mon, 05 Aug 2024 17:57:57 GMT https://rip.trb.org/View/2413894 Handbook for Implementing Traffic Safety Programs in the Workplace https://rip.trb.org/View/2394422 Wed, 19 Jun 2024 15:23:21 GMT https://rip.trb.org/View/2394422 Digital Delivery: Roadmap for Implementing Building Information Model (BIM) for Infrastructure at GDOT https://rip.trb.org/View/2342181 Wed, 21 Feb 2024 09:42:39 GMT https://rip.trb.org/View/2342181 Using Market Segmentation to Increase Transit Ridership: An Updated Handbook https://rip.trb.org/View/2307259 Wed, 13 Dec 2023 13:22:46 GMT https://rip.trb.org/View/2307259 Development of a Pavement Repair Guide and Training Tools https://rip.trb.org/View/2296800 Tue, 28 Nov 2023 15:17:56 GMT https://rip.trb.org/View/2296800 Guide for In-Terminal Airport Concession Programs https://rip.trb.org/View/2226016 Thu, 10 Aug 2023 09:45:57 GMT https://rip.trb.org/View/2226016 Development of Accelerated Bridge Construction Handbook (ABC Handbook) https://rip.trb.org/View/2221090 Fri, 28 Jul 2023 08:51:41 GMT https://rip.trb.org/View/2221090 Guide for Applying Quantitative Highway Safety Analysis Methods https://rip.trb.org/View/2219018 Tue, 25 Jul 2023 08:20:15 GMT https://rip.trb.org/View/2219018 Emerging Land Mobile Radio Communications Guide https://rip.trb.org/View/2197876 Mon, 19 Jun 2023 16:37:39 GMT https://rip.trb.org/View/2197876 NCHRP Implementation Support Program. Implementing a Guide for Urban and Suburban Roadway Cross-Section Reallocation https://rip.trb.org/View/2166264 Mon, 01 May 2023 18:02:55 GMT https://rip.trb.org/View/2166264 System Engineering Guidebook Update https://rip.trb.org/View/2100901 Wed, 18 Jan 2023 11:17:39 GMT https://rip.trb.org/View/2100901 Sustainable and Equitable Innovative Funding Strategies for Enhancing Broadband Initiative in Underserved and Disadvantaged Communities https://rip.trb.org/View/2008005 Tue, 16 Aug 2022 18:19:05 GMT https://rip.trb.org/View/2008005 Handbook for Addressing Racial Disparities in the Project Delivery Process https://rip.trb.org/View/1915994 Thu, 17 Feb 2022 11:00:28 GMT https://rip.trb.org/View/1915994