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/ Understanding Risks and Opportunities for Ramp Metering Control in a Mixed-autonomy Future https://rip.trb.org/View/2651988 Thu, 08 Jan 2026 15:26:07 GMT https://rip.trb.org/View/2651988 Development and Implementation of Coordinated Adaptive Ramp Metering (CARM) in Southern California Interstates for Congestion Mitigation https://rip.trb.org/View/2506242 Fri, 07 Feb 2025 16:07:17 GMT https://rip.trb.org/View/2506242 Design and evaluation of an Arterial-Friendly Local Ramp Metering System https://rip.trb.org/View/2250737 Thu, 21 Sep 2023 14:59:55 GMT https://rip.trb.org/View/2250737 Design and Demonstration of an Arterial-Friendly Local Ramp Metering Control System https://rip.trb.org/View/2071697 Thu, 01 Dec 2022 10:56:06 GMT https://rip.trb.org/View/2071697 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 Development and Evaluation of Collaborative Ramp Metering Control for Congested Urban Freeways https://rip.trb.org/View/1844346 Thu, 01 Apr 2021 19:33:35 GMT https://rip.trb.org/View/1844346 Integrated Corridor Management: Cooperative Signal Control with Freeway Operations and Ramp Metering (Project B4) https://rip.trb.org/View/1843137 Thu, 25 Mar 2021 20:37:59 GMT https://rip.trb.org/View/1843137 Development and Tech Transfer of an Integrated Robust Traffic State and Parameter Estimation and Adaptive Ramp Metering Control System https://rip.trb.org/View/1700595 Tue, 05 May 2020 09:14:15 GMT https://rip.trb.org/View/1700595 Crash Modification Factors (CMFs) for Intelligent Transportation System (ITS) Applications https://rip.trb.org/View/1628621 Thu, 06 Jun 2019 19:41:23 GMT https://rip.trb.org/View/1628621 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 Addressing Fidelity Between Meso- and Micro-Simulations to Evaluate Traffic Flows in Multiresolution Modeling https://rip.trb.org/View/1465504 Wed, 26 Apr 2017 16:53:06 GMT https://rip.trb.org/View/1465504 Developing and Testing Proactive Signal Control Strategies for Arterial-Freeway Diamond Interchanges https://rip.trb.org/View/1465505 Wed, 26 Apr 2017 16:45:52 GMT https://rip.trb.org/View/1465505 Performance Analysis and Control Design for On-ramp Metering of Active Merging Bottlenecks https://rip.trb.org/View/1441909 Wed, 04 Jan 2017 10:56:27 GMT https://rip.trb.org/View/1441909 Integrating Meso- and Micro-Simulation Models to Evaluate Traffic Management Strategies - Year 2 https://rip.trb.org/View/1404677 Thu, 21 Apr 2016 13:19:12 GMT https://rip.trb.org/View/1404677 Distributed Traffic Control for Reduced Fuel Consumption and Travel Time in Transportation Networks https://rip.trb.org/View/1371683 Wed, 14 Oct 2015 12:48:23 GMT https://rip.trb.org/View/1371683