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/ 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 Rural Omnichannel Healthcare: A Demand-Centric Approach in Transportation System Design https://rip.trb.org/View/2625868 Tue, 18 Nov 2025 13:56:10 GMT https://rip.trb.org/View/2625868 Developing Optimization Methods for Maritime Escort Strategies for Littoral and Chokepoint Shipping Lanes https://rip.trb.org/View/2499090 Wed, 29 Jan 2025 16:37:47 GMT https://rip.trb.org/View/2499090 Optimizing Guardrail Placements along Highways in Utah to Enhance Road Safety and Mitigate Road Departure Crashes https://rip.trb.org/View/2387164 Tue, 04 Jun 2024 13:53:37 GMT https://rip.trb.org/View/2387164 Rural Transportation System Design for Omnichannel Healthcare https://rip.trb.org/View/2342036 Mon, 19 Feb 2024 18:17:59 GMT https://rip.trb.org/View/2342036 Multi-stage Planning for Electrifying Transit Bus Systems with Multiformat Charging Facilities https://rip.trb.org/View/1675095 Thu, 26 Dec 2019 19:27:53 GMT https://rip.trb.org/View/1675095