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/ Smart Drop-Shipping and Stocking Decision Support System https://rip.trb.org/View/2703794 Sat, 16 May 2026 11:49:44 GMT https://rip.trb.org/View/2703794 New Models and Solutions to Vehicle Routing with Cardinality and Distance Constraints https://rip.trb.org/View/2703788 Sat, 16 May 2026 11:45:53 GMT https://rip.trb.org/View/2703788 Optimization-Based Framework and Decision-Support Tool for Bridge Toll Implementation Under Behavioral and Operational Constraints https://rip.trb.org/View/2696158 Mon, 27 Apr 2026 19:59:05 GMT https://rip.trb.org/View/2696158 A Robust Optimization-Based Approach for an Integrated Truck-Drone Emergency Resource Distribution System https://rip.trb.org/View/2684212 Wed, 25 Mar 2026 17:23:54 GMT https://rip.trb.org/View/2684212 Efficient Mobility for Rural Communities https://rip.trb.org/View/2683240 Tue, 24 Mar 2026 14:22:18 GMT https://rip.trb.org/View/2683240 Potential Impact of Autonomous Vehicles on Reducing Congestion https://rip.trb.org/View/2676004 Tue, 03 Mar 2026 16:17:48 GMT https://rip.trb.org/View/2676004 Optimizing Signal Timing Through New Technologies https://rip.trb.org/View/2640688 Tue, 16 Dec 2025 09:06:42 GMT https://rip.trb.org/View/2640688 Empowering Para-Transit through Automation: A Behaviorally Informed Optimization Approach https://rip.trb.org/View/2625307 Thu, 13 Nov 2025 14:58:29 GMT https://rip.trb.org/View/2625307 A Reinforcement Learning Framework for Dynamic Inland Waterway Maintenance Under Stochastic Shoaling and Annual Budget Allocation https://rip.trb.org/View/2620600 Mon, 10 Nov 2025 09:33:02 GMT https://rip.trb.org/View/2620600 Urban Network Speed Optimization for Connected Automated Vehicles: Development and Testing https://rip.trb.org/View/2606410 Thu, 02 Oct 2025 15:21:38 GMT https://rip.trb.org/View/2606410 Field Deployment and Testing of Enhanced Fixed- and Actuated-Traffic Signal Control Systems https://rip.trb.org/View/2606409 Thu, 02 Oct 2025 15:18:45 GMT https://rip.trb.org/View/2606409 Clay and Shale LRFD Design Criteria for Drilled Shaft Foundations https://rip.trb.org/View/2604567 Mon, 29 Sep 2025 16:35:38 GMT https://rip.trb.org/View/2604567 Develop Performance Models for Different Preventive Maintenance Treatments https://rip.trb.org/View/2604521 Mon, 29 Sep 2025 16:08:57 GMT https://rip.trb.org/View/2604521 Innovations Deserving Exploratory Analysis--The Transit IDEA Program. IDEA 109. Simulation-based Decision-Making Tool for Microtransit Service Evaluation and Optimization https://rip.trb.org/View/2572333 Tue, 08 Jul 2025 17:11:39 GMT https://rip.trb.org/View/2572333 SPR-5033: Optimizing field compaction of granular materials: Research and guideline development https://rip.trb.org/View/2553994 Thu, 15 May 2025 16:03:34 GMT https://rip.trb.org/View/2553994