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/ Modeling the Economic Impact of Pavement Condition on Free Flow Speeds in Highway Networks https://rip.trb.org/View/2675925 Mon, 12 Oct 2026 14:41:54 GMT https://rip.trb.org/View/2675925 Improving Drainage and Seepage of Existing Retaining Structures https://rip.trb.org/View/2675929 Mon, 12 Oct 2026 14:32:37 GMT https://rip.trb.org/View/2675929 Verification of Wide Base Tire Impacts on Pavement Design and Performance in Michigan https://rip.trb.org/View/2675930 Mon, 12 Oct 2026 14:27:15 GMT https://rip.trb.org/View/2675930 Improve MDOT's Understanding of the Acceptance and Performance of Riprap https://rip.trb.org/View/2731977 Fri, 17 Jul 2026 15:21:06 GMT https://rip.trb.org/View/2731977 Enhanced Understanding of Geotechnical Processes https://rip.trb.org/View/2731975 Fri, 17 Jul 2026 15:11:11 GMT https://rip.trb.org/View/2731975 Evaluate Traffic Control Devices Viable Use to Reduce Speeding Behavior at High-Low Speed Zone Locations in Michigan https://rip.trb.org/View/2731925 Fri, 17 Jul 2026 14:50:37 GMT https://rip.trb.org/View/2731925 Evaluate PVC Water Main Materials in Roadway Projects https://rip.trb.org/View/2731924 Fri, 17 Jul 2026 14:29:12 GMT https://rip.trb.org/View/2731924 Evaluation of Traffic Speed Deflectometer Data (TSD) for Potential Use in Michigan https://rip.trb.org/View/2731922 Fri, 17 Jul 2026 13:59:29 GMT https://rip.trb.org/View/2731922 Enhanced Understanding of Concrete Pavement Performance https://rip.trb.org/View/2731921 Fri, 17 Jul 2026 13:20:05 GMT https://rip.trb.org/View/2731921 Enhanced Understanding of Hot Mix Asphalt (HMA) https://rip.trb.org/View/2731920 Fri, 17 Jul 2026 13:08:30 GMT https://rip.trb.org/View/2731920 Traffic Signal Pre-emption Effectiveness in Michigan https://rip.trb.org/View/2731919 Fri, 17 Jul 2026 11:58:12 GMT https://rip.trb.org/View/2731919 Connected and Automated Vehicle (CAV) Readiness Survey: Are MDOT Roads Machine Readable https://rip.trb.org/View/2731918 Fri, 17 Jul 2026 11:47:59 GMT https://rip.trb.org/View/2731918 High Load Hit Prevention https://rip.trb.org/View/2562331 Fri, 17 Jul 2026 10:22:15 GMT https://rip.trb.org/View/2562331 Guidelines and Best Practices for Determining the Life Cycle Cost of Various Superstructure Types https://rip.trb.org/View/2731917 Fri, 17 Jul 2026 10:05:08 GMT https://rip.trb.org/View/2731917 Connected and Automated Vehicles (CAV) Readiness Survey https://rip.trb.org/View/2612891 Thu, 23 Oct 2025 07:09:43 GMT https://rip.trb.org/View/2612891