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/ Corridor Speed Management Strategies Toolbox https://rip.trb.org/View/2693730 Thu, 16 Apr 2026 10:46:12 GMT https://rip.trb.org/View/2693730 TRB Core Program Services for a Highway RD&T Program – Federal Fiscal Year 2026/TRB (State DOTs) Fiscal Year 2027 https://rip.trb.org/View/2692353 Tue, 14 Apr 2026 20:24:09 GMT https://rip.trb.org/View/2692353 An Efficient Algorithm for Solving Collaborative Truck-Drone Parcel Delivery System Considering En-Route Launching and Recovery Points https://rip.trb.org/View/2692315 Tue, 14 Apr 2026 12:15:01 GMT https://rip.trb.org/View/2692315 Advanced Sustainable Transportation Workforce Development Initiative in California’s Inland Empire https://rip.trb.org/View/2692313 Tue, 14 Apr 2026 12:12:50 GMT https://rip.trb.org/View/2692313 Implementing an Advanced Open-Source Activity Based Travel Demand Model to Support Rural Transportation Planning and Policy Decisions https://rip.trb.org/View/2692312 Tue, 14 Apr 2026 12:09:54 GMT https://rip.trb.org/View/2692312 Transportation Corridor Fuel Consumption Calculator (TCFCC) Version 5.0 https://rip.trb.org/View/2692310 Tue, 14 Apr 2026 12:07:08 GMT https://rip.trb.org/View/2692310 Administration of Highway and Transportation Agencies. Support for Development of AASHTO'S 2027-2032 Strategic Plan https://rip.trb.org/View/2692291 Mon, 13 Apr 2026 16:41:46 GMT https://rip.trb.org/View/2692291 Implementing an Advanced Open-Source Activity Based Travel Demand Model to Support Rural Transportation Planning and Policy Decisions: Phase 2 – Calibration https://rip.trb.org/View/2691726 Sun, 12 Apr 2026 23:58:15 GMT https://rip.trb.org/View/2691726 Rural Vehicle Markets and Consumer Affordability https://rip.trb.org/View/2691725 Sun, 12 Apr 2026 23:55:16 GMT https://rip.trb.org/View/2691725 Anchorage Design and Detailing for Fabric-Reinforced Cementitious Matrix Retrofits of Transportation Concrete Structures https://rip.trb.org/View/2691724 Sun, 12 Apr 2026 23:52:50 GMT https://rip.trb.org/View/2691724 New Travel Insights from Cell Phone GPS Data https://rip.trb.org/View/2691672 Sun, 12 Apr 2026 23:48:02 GMT https://rip.trb.org/View/2691672 Continuous approximation models for rural transit network design https://rip.trb.org/View/2691671 Sun, 12 Apr 2026 23:45:58 GMT https://rip.trb.org/View/2691671 Enabling Next-Generation Safe, Efficient and Reliable Traffic Signal Management via Advanced Sensing and Foundation Models https://rip.trb.org/View/2691670 Sun, 12 Apr 2026 23:42:56 GMT https://rip.trb.org/View/2691670 Sensor-informed Generative Digital Twin: High-fidelity Simulation for Sustainable Transportation and Policy Validation https://rip.trb.org/View/2691669 Sun, 12 Apr 2026 23:41:20 GMT https://rip.trb.org/View/2691669 Optimizing External Human-Machine Interfaces (eHMIs) Designs in Autonomous Vehicles to Improve Communication with Drivers and Bicyclists https://rip.trb.org/View/2691668 Sun, 12 Apr 2026 23:39:01 GMT https://rip.trb.org/View/2691668