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/ Real-time Pedestrian Safety and Risk Exposure using Real-time Vehicle Activity and Fleet Composition https://rip.trb.org/View/2669652 Sun, 15 Feb 2026 16:27:33 GMT https://rip.trb.org/View/2669652 Pedestrian Level of Traffic Stress (PLTS) Validation for Pedestrians with a range of Ages and Abilities https://rip.trb.org/View/2625597 Mon, 17 Nov 2025 14:33:05 GMT https://rip.trb.org/View/2625597 Bike Infrastructure Planning Based On Mobile-Sourced Data and Anticipated Route Shifts https://rip.trb.org/View/2606556 Fri, 03 Oct 2025 14:54:38 GMT https://rip.trb.org/View/2606556 Correlation of Laboratory Three-Wheel Polisher Revolutions with Roadway Accumulated-Traffic to Evaluate Laboratory Polishing of Pavements https://rip.trb.org/View/2593938 Thu, 28 Aug 2025 11:32:33 GMT https://rip.trb.org/View/2593938 Experimental Approaches for Integrating External Factors into Pathway for Planning (P4P) Traffic Volume Forecasting https://rip.trb.org/View/2573011 Thu, 10 Jul 2025 08:17:53 GMT https://rip.trb.org/View/2573011 Truck Permits: Managing Increasing Loads and Mitigating Infrastructure Damage to Balance Freight Mobility https://rip.trb.org/View/2472700 Mon, 09 Dec 2024 10:27:20 GMT https://rip.trb.org/View/2472700 Roundabouts, J-Turn, etc. - Understanding their Economic Impacts https://rip.trb.org/View/2414044 Wed, 07 Aug 2024 17:23:45 GMT https://rip.trb.org/View/2414044 Traffic Monitoring and Traffic Data https://rip.trb.org/View/2071563 Mon, 28 Nov 2022 14:20:04 GMT https://rip.trb.org/View/2071563 Evaluate the Benefits of Increasing Clear Zone at Higher Speed/Traffic Volume/Crash Locations https://rip.trb.org/View/1957084 Thu, 26 May 2022 17:03:11 GMT https://rip.trb.org/View/1957084 Safety Performance for Active Transportation Modes Using Exposure Models https://rip.trb.org/View/1854199 Thu, 27 May 2021 20:07:27 GMT https://rip.trb.org/View/1854199 A Guide for the Development and Use of Truck Traffic Forecasts in Design https://rip.trb.org/View/1854172 Tue, 25 May 2021 15:45:27 GMT https://rip.trb.org/View/1854172 Determining Segment and Network Traffic Volumes from Video Data Obtained from Transit Buses in Regular Service: Developments and Evaluation of Approaches for Ongoing Use Across Urban Networks https://rip.trb.org/View/1758051 Wed, 16 Dec 2020 14:26:28 GMT https://rip.trb.org/View/1758051 Evaluating Permitted/Protected Versus Protected Left Turn Signals in Louisiana https://rip.trb.org/View/1745653 Thu, 15 Oct 2020 16:16:15 GMT https://rip.trb.org/View/1745653 RES2020-12: Evaluating the Performance of Inverted Pavements in Tennessee https://rip.trb.org/View/1716733 Fri, 26 Jun 2020 18:17:50 GMT https://rip.trb.org/View/1716733 Methods for Assigning Short-Duration Traffic Volume Counts to Adjustment Factor Groups for Estimating AADT https://rip.trb.org/View/1707201 Wed, 20 May 2020 15:21:44 GMT https://rip.trb.org/View/1707201