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/ Selection, Integration, and Effectiveness Study of Input Data for Nebraska Variable Speed Signs on I-80 https://rip.trb.org/View/2507247 Mon, 10 Feb 2025 14:01:19 GMT https://rip.trb.org/View/2507247 Semi-Automation of Interstate-90 Variable Speed Limit (I-90 VSL) Corridor in Ohio's Advanced Traffic Management System (ATMS) https://rip.trb.org/View/2431342 Tue, 17 Sep 2024 14:37:15 GMT https://rip.trb.org/View/2431342 Automating Variable Speed Limits Using Weather, Traffic and Friction Data https://rip.trb.org/View/2342045 Mon, 19 Feb 2024 18:55:50 GMT https://rip.trb.org/View/2342045 Dynamic Coordinated Speed Control and Synergistic Performance Evaluation in Connected and Automated Vehicle Environment https://rip.trb.org/View/2010010 Fri, 19 Aug 2022 15:10:55 GMT https://rip.trb.org/View/2010010 Reinforcement Learning for Optimal Speed Limit Control Over Network https://rip.trb.org/View/1870420 Wed, 04 Aug 2021 14:49:32 GMT https://rip.trb.org/View/1870420 SPR-4636: Research Support to INDOT on I-465 Southeast Variable Speed Limit and Ramp Meter Project https://rip.trb.org/View/1858258 Thu, 10 Jun 2021 15:39:47 GMT https://rip.trb.org/View/1858258 Evaluating the Impacts of Real-Time Warnings and Variable Speed Limits on Safety and Travel Reliability during Weather Events https://rip.trb.org/View/1854164 Tue, 25 May 2021 12:20:41 GMT https://rip.trb.org/View/1854164 Integration of Ramp Metering, Variable Speed Limit, and Off-Ramp Progression https://rip.trb.org/View/1592822 Fri, 15 Mar 2019 14:20:00 GMT https://rip.trb.org/View/1592822 Implementation of SHRP2 Results within the Wyoming Connected Vehicle Variable Speed Limit System SHRP2 Implementation Assistance Program (Round 4) https://rip.trb.org/View/1571600 Wed, 05 Dec 2018 12:40:33 GMT https://rip.trb.org/View/1571600 Field Test of Variable Speed Advisory (VSA) for Freeway Traffic Control https://rip.trb.org/View/1427378 Tue, 25 Oct 2016 10:31:40 GMT https://rip.trb.org/View/1427378 SPR-3900: Variable Speed Limit Feasibility Study https://rip.trb.org/View/1357042 Wed, 10 Jun 2015 01:01:18 GMT https://rip.trb.org/View/1357042 Bounded Acceleration and Capacity Drop at Merging Bottlenecks https://rip.trb.org/View/1239205 Thu, 31 Jan 2013 01:01:20 GMT https://rip.trb.org/View/1239205 Preparations for Field Testing of Combined Variable Speed Limit and Coordinated Ramp Metering for Freeway Traffic Control https://rip.trb.org/View/1234187 Thu, 03 Jan 2013 15:08:13 GMT https://rip.trb.org/View/1234187