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    <title>Research in Progress (RIP)</title>
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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
    <docs>http://blogs.law.harvard.edu/tech/rss</docs>
    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
    <image>
      <title>Research in Progress (RIP)</title>
      <url>https://rip.trb.org/Images/PageHeader-wTitle-RIP.jpg</url>
      <link>https://rip.trb.org/</link>
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    <item>
      <title>Connected Corridor Advancement Initiative</title>
      <link>https://rip.trb.org/View/2712040</link>
      <description><![CDATA[The Connected Corridor Advancement Initiative (CCAI) aims to modernize corridor operations, enhance safety, and optimize economic efficiency by aligning efforts across state, federal, and private sectors. Objectives include developing and implementing open data standards for Work Zone Data Exchange (WZDx), Truck Parking Information Monitoring Systems (TPIMS), and national interoperability of communication data feeds to enable seamless communication across jurisdictions. Additionally, the initiative seeks to prepare the corridor for connected and automated vehicle (CAV) technologies by supporting data interoperability between states, agencies, emergency services, industry partners and the traveling public.]]></description>
      <pubDate>Mon, 08 Jun 2026 11:10:32 GMT</pubDate>
      <guid>https://rip.trb.org/View/2712040</guid>
    </item>
    <item>
      <title>From Region to Relationships: Toolkit for Developing Multimodal Corridor Systems</title>
      <link>https://rip.trb.org/View/2709251</link>
      <description><![CDATA[State departments of transportation (DOTs) and metropolitan planning organizations (MPOs) utilize extensive resources and time to develop robust long-range transportation plans and asset management plans that are very policy based. In addition, they develop their very location-specific programs and program projects. However, apart from an area that may require National Environmental Policy Act (NEPA) analysis, there is an overall lack of tools to tie the statewide/regional/local policy plans to specific projects in (state) transportation improvement programs.

Corridor plans at either a statewide or regional level can provide states and MPOs with a tool to bridge this gap (especially among local jurisdictions) and to allow for a corridor-specific vision and plan. This corridor plan and vision will take the statewide/regional vision and goals, tailor them to the corridor, and then provide guidance and a framework when state and local agencies develop projects along that corridor. The primary function of these corridors (activity, multimodal, main street, freeways, arterials, etc.), their connections between surrounding land uses, and safety, mobility, and accessibility needs should be factored in.

OBJECTIVE: The objective of this research is to identify strategies for state DOTs to encourage local agencies to proactively generate multimodal master plans based on the long-term vision for the corridor and its surrounding land uses.]]></description>
      <pubDate>Tue, 02 Jun 2026 11:29:53 GMT</pubDate>
      <guid>https://rip.trb.org/View/2709251</guid>
    </item>
    <item>
      <title>A Framework for Integrated Quality of Service Evaluation using Operational and Safety Considerations</title>
      <link>https://rip.trb.org/View/2703926</link>
      <description><![CDATA[This project addresses a critical gap in transportation decision-making by examining the relationships among safety and operational performance measures that State DOTs typically use for planning, design, and operations. While agencies rely on different metrics depending on application, such as crash-based measures for safety projects and travel time reliability or delay for congestion management, there is limited guidance on how these measures interact or how they should be jointly considered when evaluating alternatives. Using multi-source data from State DOTs and third-party providers along major corridors in Region VII, the project will quantify correlations, trade-offs, and synergies among key performance measures and develop a practical, multi-objective evaluation framework tailored to common DOT applications. The resulting framework and guidance will enable agencies to conduct more consistent, transparent, and context-sensitive evaluations that better balance safety and operational objectives.
]]></description>
      <pubDate>Thu, 21 May 2026 22:41:30 GMT</pubDate>
      <guid>https://rip.trb.org/View/2703926</guid>
    </item>
    <item>
      <title>Governance of Multimodal Planning: Examining Transit Corridor Planning Strategies in California</title>
      <link>https://rip.trb.org/View/2696845</link>
      <description><![CDATA[This project will evaluate sub-regional corridor-scale multimodal planning processes in California that aim to improve multi-modal access and mobility for reaching desired destinations (e.g. homes and residences). Research has demonstrated that transit and active transport use can be enhanced through coordinated planning of facilities and services on a corridor and/or travel network basis, especially when also coordinated with land use strategies. With some new and ambitious corridor/mobility-hub planning efforts currently underway in California, now is a good time to evaluate what makes them succeed or fail. Although the potential benefits from such strategies have been shown to be substantial, corridor-plus-station area planning faces considerable challenges, many of which concern the challenges of institutional coordination. Yet scant research has examined governance challenges of multimodal planning in California. This research project will address this neglected yet critical topic through case study analysis of selected current and past sub-regional corridor planning efforts in California. Through public documents analysis and interviews with stakeholders, the project will examine and compare the selected planning processes in relation to: stakeholders involved; goals, objectives, and operational measures established; planning and analytical processes/procedures pursued; stakeholder interests and concerns; policies, programs, and projects adopted and funded for implementing the objectives; and outcomes achieved (including measurable impacts for mode choice, VMT (Vehicle Miles Traveled), and access and mobility to desired destinations by mode). The project will identify best practices and obstacles and pitfalls for effective corridor planning and consider how the state government can support multimodal corridor planning, as these plans support the transformation of the transportation networks they cover by improving access to transportation modes and increasing travel mobility to desired destinations.]]></description>
      <pubDate>Tue, 28 Apr 2026 11:01:11 GMT</pubDate>
      <guid>https://rip.trb.org/View/2696845</guid>
    </item>
    <item>
      <title>A Data-driven Approach in Improving Truck Parking Efficiency</title>
      <link>https://rip.trb.org/View/2684213</link>
      <description><![CDATA[Freight transportation systems are a critical component of the United States' economy, underscoring the importance of adequate truck parking to ensure safe and efficient operations. However, a significant disparity between truck parking demand and supply has resulted in numerous challenges, including increased road safety risks, regulatory non-compliance, and operational inefficiencies. This study aims to address this knowledge gap by conducting a comprehensive review of current truck parking management approaches, with a focus on data-driven prediction models, and truck parking pattern analysis. In collaboration with the North Carolina Department of Transportation (NCDOT), the study will analyze truck parking patterns along key freight corridors and develop data-driven solutions to enhance parking efficiency and address these pressing challenges.

This project aims to address this gap by conducting a comprehensive review of existing literature and offering a nuanced exploration of potential truck parking solutions. Using NC as a case study, the project will provide data-driven recommendations to improve the efficiency and utilization of existing parking facilities along key freight corridors. By enhancing the safety and efficiency of truck parking, this study will directly benefit truck operators, supply chain stakeholders, regulatory agencies, and local communities. The findings will serve as a foundation for informed policymaking and infrastructure planning, ensuring that North Carolina’s freight transportation network remains resilient, sustainable, and operationally efficient in the face of growing demands.]]></description>
      <pubDate>Wed, 25 Mar 2026 17:16:25 GMT</pubDate>
      <guid>https://rip.trb.org/View/2684213</guid>
    </item>
    <item>
      <title>Connected Corridors Advancement Initiative</title>
      <link>https://rip.trb.org/View/2645418</link>
      <description><![CDATA[The I-80 Corridor Coalition and I-35 Advancement Alliance are spearheading the Connected Corridors Advancement Initiative (CCAI) to address evolving challenges and leverage opportunities in corridor management and transportation technology. As critical transcontinental arteries, these corridors underpin national commerce and mobility, fostering regional connectivity and economic growth.

Building upon AASHTO NCHRP 20-24(138) recommendations and inspired by successful models such as the I-95 Corridor Coalition and the Eastern Transportation Coalition, the initiative seeks to establish a framework for open data standards, infrastructure modernization, and multi-state collaboration. The Nevada DOT SMART Grant Enhancing Corridor Communication Roadmap will serve as a foundation model, showcasing enhanced inter-agency coordination and scalable technology deployment. International efforts, including Europe’s NAPCORE and Canada’s CAV Standards, highlight best practices in data interoperability and advanced infrastructure.

To sustain economic competitiveness, ensure national security, and foster technological leadership, the United States must develop integrated, multi-state corridor frameworks focused on data sharing, operational efficiency, and resilient infrastructure. Enhanced collaboration will bolster domestic mobility, supply chain reliability, and national emergency response capacity. Corridor coalitions have demonstrated the effectiveness of public-private partnerships in addressing infrastructure needs, facilitating transportation planning, and improving operational efficiency across multiple jurisdictions.

OBJECTIVES: The CCAI aims to modernize corridor operations, enhance safety, and optimize economic efficiency by aligning efforts across state, federal, and private sectors. Objectives include developing and implementing open data standards for Work Zone Data Exchange (WZDx), Truck Parking Information Monitoring Systems (TPIMS), and national interoperability of communication data feeds to enable seamless communication across jurisdictions. Additionally, the initiative seeks to prepare the corridor for connected and automated vehicle (CAV) technologies by supporting data interoperability between states, agencies, emergency services, industry partners and the traveling public.]]></description>
      <pubDate>Wed, 24 Dec 2025 15:04:16 GMT</pubDate>
      <guid>https://rip.trb.org/View/2645418</guid>
    </item>
    <item>
      <title>Statewide Innovative Corridor Planning Study</title>
      <link>https://rip.trb.org/View/2643440</link>
      <description><![CDATA[This study will increase our knowledge of best practices for coordinated corridor planning and provide a reference guidebook for Colorado Department of Transportation (CDOT) planners. An improved corridor planning process would include approaches to harmonize transportation and land use. It would contribute to more efficient and sustainable urban development. The focus would be to improve planning for projects in CDOT’s 10-Year Plan pipeline.]]></description>
      <pubDate>Tue, 23 Dec 2025 13:57:18 GMT</pubDate>
      <guid>https://rip.trb.org/View/2643440</guid>
    </item>
    <item>
      <title>Navigating Improved Outcomes with Transportation Corridor Rankings</title>
      <link>https://rip.trb.org/View/2577110</link>
      <description><![CDATA[Risk rankings and other measurement tools like level of service are trusted approaches utilized by the Minnesota Department of Transportation (MnDOT) to ensure projects lead to systematic improvements over time. This research will explore how to develop a similar, comprehensive system for assigning public health ratings (community context, safety, health inequities, physical activity, chronic disease, air quality, etc.) to Minnesota trunk highway corridors. The project will also identify how to integrate the health ratings into state transportation decision-making efforts, such as project selection criteria, project prioritization, or mitigation guidance.]]></description>
      <pubDate>Fri, 18 Jul 2025 10:29:30 GMT</pubDate>
      <guid>https://rip.trb.org/View/2577110</guid>
    </item>
    <item>
      <title>Corridor Planning Tool for Efficient and Resilient Agricultural Supply Chain in California</title>
      <link>https://rip.trb.org/View/2422986</link>
      <description><![CDATA[In California, which leads in agricultural output while its economy relies on an extensive freight network, there exists a gap in providing stakeholders with the necessary guidance to assess the resilience of critical infrastructure elements such as corridors, intermodal connectors, and aging bridges for efficient movement of agricultural products and its supply chain. The objective of this proposed research is to enable stakeholders to identify and implement strategies that would improve the efficiency and resilience of freight networks for the movement of key agricultural commodities in California as well as in other states in which agricultural supply chain constitutes a significant part of the economy. The research approach will involve developing a framework for risk priority of various elements of agricultural freight infrastructure in California.]]></description>
      <pubDate>Thu, 29 Aug 2024 16:20:41 GMT</pubDate>
      <guid>https://rip.trb.org/View/2422986</guid>
    </item>
    <item>
      <title>Florida Freight Corridor Planning</title>
      <link>https://rip.trb.org/View/2399769</link>
      <description><![CDATA[This project will develop an actionable urban transportation policy, planning, and implementation framework and vision to guide long-term investments in commercial and freight transportation. This research project will use a team of transportation and planning experts to identify concrete and tangible projects, organized with six discrete tasks. If implemented, these projects have the potential to position the State of Florida as the Southeast's central freight and commercial transportation hub.]]></description>
      <pubDate>Mon, 01 Jul 2024 10:19:03 GMT</pubDate>
      <guid>https://rip.trb.org/View/2399769</guid>
    </item>
    <item>
      <title>Strategies for Transportation System Management and Operational Enhancement of Arterial Roadways</title>
      <link>https://rip.trb.org/View/2366296</link>
      <description><![CDATA[The overall goal of this research project is to develop guidance materials for characterizing a corridor and its needs for enhancement, describing all arterial transportation systems management and operations (TSM&O) strategies for implementations, and developing performance reporting goals on safety an(d mobility.]]></description>
      <pubDate>Mon, 03 Jun 2024 14:40:55 GMT</pubDate>
      <guid>https://rip.trb.org/View/2366296</guid>
    </item>
    <item>
      <title>Support for AASHTO Committees and Councils. Roadmap for Integrated Selection of Multimodal Facilities</title>
      <link>https://rip.trb.org/View/2348473</link>
      <description><![CDATA[The highway system now supports more uses than ever before, creating the need to balance them all within the limited space of the roadways. While the increase in types of use the roadways supports is beneficial to the health, economy, and resiliency of the transportation network, it also creates a substantial challenge to meet the needs of all roadway users.

Currently, a typical way to decide how to build a multimodal facility is to use multiple American Association of Highway and Transportation Officials (AASHTO) publications focused on individual modes of travel. As several of these are independent documents focused on specific modes, there is an opportunity to review how these documents might more effectively inform decision makers in a more integrated approach. 

Furthermore, given the timing of the various design manual updates can lead to missed opportunities for the coordination of common elements in each document. Streamlined guidance at the national level may help avoid future repetitive updates that take years of overhaul, dedicated staff time, and financial investment. 

Current and forthcoming AASHTO publications (e.g., A Policy on Geometric Design of Highways and Streets; Guide for the Development of Bicycle Facilities; Guide for the Planning, Design, and Operation of Pedestrian Facilities) include new planning and design concepts for motorized and nonmotorized users on streets and highways. To support these publications, there is a need for a comprehensive approach to guidance and training material that would give planners and designers direction on developing a holistic process to choose a multimodal facility in one consolidated document.

The objective of this project is to produce a roadmap to establish an integrated selection process for multimodal facilities for developing transportation infrastructure projects.

This research would suggest strategies directly correlated with AASHTO strategic safety plans and initiatives to reduce serious injuries and fatalities while planning and designing safer roadways for all and streamlining and strengthening decision-making for multimodal facility selection. 

The outcome of this research will be a roadmap to establish an integrated selection process for multimodal facilities using all relevant AASHTO and related design guidance documents. Using this roadmap should enhance the safety and mobility of the traveling public across all modes and aid planning and design practitioners by removing silos when considering all roadway users in developing transportation infrastructure projects. ]]></description>
      <pubDate>Fri, 08 Mar 2024 10:00:28 GMT</pubDate>
      <guid>https://rip.trb.org/View/2348473</guid>
    </item>
    <item>
      <title>Demonstration of the Application of Travel Speed Deflectometer (TSD) Data in Developing Long-Range Corridor Planning and Management Strategies for Critical Transportation Corridors Within the Mississippi State Highway System</title>
      <link>https://rip.trb.org/View/2264433</link>
      <description><![CDATA[The objective of this work is to demonstrate the effectiveness and methods for MDOT to leverage the evaluation of traffic speed deflectometer (TSD) data generated as part of MDOT’s participation in the Federal Highway Administration (FHWA) Pooled Fund Study TPF‐5(385). Under the FHWA TPF-5(385) study, approximately 200 lane miles of TSD data was collected in the fall of 2022, primarily on MS-16 and MS-19. The proposed evaluation will include combining the TSD data with layer thickness calculated from the onboard 3D GPR system to calculate pavement layer moduli, structural number, remaining pavement service interval, and recommended asphalt overlay thickness. This analyzed data will be used to assist MDOT in the selection, prioritization, and scheduling of projects and proposed treatments based on realistic current and projected roadway structure information.  Additionally, this information will be incorporated into the newly revamped MDOT Pavement Management System (PMS).  THE PMS will be used to develop several optimized funding strategies for evaluation and implementation.]]></description>
      <pubDate>Mon, 09 Oct 2023 09:34:50 GMT</pubDate>
      <guid>https://rip.trb.org/View/2264433</guid>
    </item>
    <item>
      <title>Refining C3 Context-Classification Criteria for Low-Income and Minority Populations</title>
      <link>https://rip.trb.org/View/2256336</link>
      <description><![CDATA[FDOT’s context classification system seeks to provide guidance for design of streets in different developmental contexts. While this prescriptive approach to street design can greatly aid in addressing the safety needs of pedestrians and bicyclists, it presumes that rates of walking and bicycling are more likely to occur in areas with more “urban” developmental patterns. While this is certainly true for more affluent populations, for whom non-motorized travel is a choice, it is often not the case for lower income populations, which report lower levels of automobile ownership and thus greater reliance on walking, bicycling, and transit to accomplish basic travel objectives. (restart of BED27 977-01)]]></description>
      <pubDate>Thu, 28 Sep 2023 08:20:16 GMT</pubDate>
      <guid>https://rip.trb.org/View/2256336</guid>
    </item>
    <item>
      <title>USF-CUTR I-4 FRAME Project "After" Study: Data Collection and Analysis of Safety and Mobility Conditions After Implementation</title>
      <link>https://rip.trb.org/View/2154954</link>
      <description><![CDATA[This research project will collect and analyze “after” data for applications allocated to USF-CUTR, perform a before-after study to evaluate impacts and improvements of the deployed I-4 FRAME applications, conduct an overall benefit-cost analysis for the I-4 FRAME project Connected Vehicle (CV) applications, perform satisfaction survey and analysis of I-4 FRAME CV Apps users, and document research findings and recommendations. The primary project objectives and efforts from the USF-CUTR team include the following: (1) complete “after” data collection for 10 selected I-4 FRAME applications allocated to USF-CUTR, addressing mobility challenges and benefit-cost analysis, and collect sample data during pre-deployment to minimize data gaps in the before-after data analysis; (2) evaluate impacts and improvements to mobility and safety from 10 selected applications via before-after studies; (3) address mobility challenges on I-4 FRAME project corridors; (4) perform an overall benefit-cost analysis for the 10 applications allocated to USF-CUTR; (5) conduct a satisfaction survey and analysis of I-4 FRAME users; and (6) document results of before-after studies, impact of I-4 FRAME application, benefit-cost analysis, user satisfaction survey, research findings, and recommendations.]]></description>
      <pubDate>Mon, 17 Apr 2023 15:26:35 GMT</pubDate>
      <guid>https://rip.trb.org/View/2154954</guid>
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