<?xml version="1.0" encoding="utf-8"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>TRB Publications Index</title><link>http://pubsindex.trb.org/</link><atom:link href="http://pubsindex.trb.org/common/TRIS Suite/feeds/rss.aspx?tc=NN%3AKc%2A" rel="self" type="application/rss+xml" /><description></description><language>en-us</language><copyright>Copyright © 2015. 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>TRB Publications Index</title><url>http://pubsindex.trb.org/Images/PageHeader-wTitle.png</url><link>http://pubsindex.trb.org/</link></image><item><title>Integrated Container Slot Allocation and Automated Stacking Crane Scheduling in Automated Container Terminals with Limited Buffers</title><link>http://pubsindex.trb.org/view/2703736</link><description><![CDATA[This paper investigates the integrated scheduling of automated stacking cranes (ASCs) and container slot allocation in automated container terminals (ACTs) with limited buffer capacity. A hybrid stacking strategy based on time windows is proposed, and a bi-objective mixed-integer programming model is developed, considering automated guided vehicles and truck buffer capacities, ASC safety distances, and handshake area operations. An enhanced non-dominated sorting genetic algorithm II with tabu search (NSGA-II-TS) is designed, with parameters optimized via sensitivity analysis. Experiment results show that comparisons with an exact mixed-integer linear programming solver validate the solution quality of the proposed approach, and that the proposed algorithm significantly outperforms benchmark heuristic methods in generating high-quality Pareto-optimal solutions. Case studies reveal that dynamically adjusting handshake area locations and setting buffer capacity to six units effectively balance container flow and operational costs. The proposed approach is also validated against two alternative scheduling strategies, demonstrating superior effectiveness. This research provides new strategies and a robust method for improving the operational efficiency of ACTs under buffer constraints.]]></description><pubDate>Sat, 16 May 2026 12:15:36 GMT</pubDate><guid>http://pubsindex.trb.org/view/2703736</guid></item><item><title>Performance, Economic, and Environmental Assessment of Steel Slag Aggregate in Roller Compacted Concrete Pavement</title><link>http://pubsindex.trb.org/view/2701113</link><description><![CDATA[Utilization of steel slag aggregate (SSA) in roller compacted concrete pavement (RCCP) provides a promising approach to mitigate natural aggregate depletion and reduce the environmental footprint of pavement construction. This study systematically evaluates RCCP mixtures with SSA replacement levels from 0% to 100%, considering fresh state behavior, mechanical, durability and functional properties, economic and life cycle assessments (LCAs). The moisture density test revealed that an increase in SSA contents (0%–100%) increased the optimum moisture content (13%–35%) and improved the dry density by 1.2%–5.2%. Low and moderate inclusions of SSA (25%–50%) enhanced compressive and flexural strength (16%–21%) because of denser packing and better aggregate–mortar bonding. However, higher replacement levels (≥ 75%) of SSA reduced the mechanical performance because of excessive angularity and poor packing. Durability and functional assessments indicated that an increase in SSA content improved abrasion and skid resistance and increased water absorption because of its vesicular porous structure. Economic analysis showed that moderate SSA content (50%) reduced slab thickness and construction costs by up to 16%, while higher SSA content increased initial construction costs because of thicker slabs. The LCA revealed a decrease in 11% carbon dioxide emissions and 7% energy consumption at moderate SSA inclusion. To integrate the engineering, economic, and environmental performance outcomes, a hybrid entropy–analytic hierarchy process method was used to assign weights, and the Technique for Order Preference by Similarity to Ideal Solution was employed for ranking. The results indicate moderate SSA (50%) inclusion as the most balanced and sustainable mixture in RCCP.]]></description><pubDate>Mon, 11 May 2026 08:51:42 GMT</pubDate><guid>http://pubsindex.trb.org/view/2701113</guid></item><item><title>Transportation's Role in Building and Sustaining a Competitive Economy</title><link>http://pubsindex.trb.org/view/2678783</link><description><![CDATA[This article includes highlights from a Fall 2025 webinar hosted by the Transportation Research Board focused on how transportation supports economic growth and supply chain resilience. The webinar featured three presenters: (1) Rolf Schmitt, Bureau of Transportation Statistics, discussed the different roles that transportation plays in the economy and the use of data to support transportation investment and decision making; (2) Paul Bingham, S&amp;P Global Market Intelligence, focused on businesses’ supply chain logistics; and (3) Carrie Kissel, National Association of Development Organizations, focused on rural transportation and its effect on the overall health of the U.S. economy. The webinar video and PowerPoint slides are available at  https://www.nationalacademies.org/projects/TRB-TRB%20EO-25-P-659/event/45884]]></description><pubDate>Thu, 02 Apr 2026 15:16:37 GMT</pubDate><guid>http://pubsindex.trb.org/view/2678783</guid></item><item><title>Developing Snapshots for Transportation Planning</title><link>http://pubsindex.trb.org/view/2591957</link><description><![CDATA[Transportation planning agencies and officials face a rapidly evolving technical, policy, legislative, and procedural environment. Agency professionals often seek the guidance of peers and experts to help them effectively address these challenges. Challenges include managing the demand for new transportation technologies and services within the confinements of existing streets, navigating the effects of growing e-commerce on travel patterns, managing resilience and risks, and implementing transportation planning in compliance with federal and state laws and regulations. This report, from the Transportation Research Board's (TRB's) National Cooperative Highway Research Program, documents the process of developing four Snapshots of Planning Practices, concise and visually appealing documents that report on current planning practices in use by transportation agencies in four practice areas: Complete Streets, Data Sharing for Performance Management, Collaboration on Local Freight Delivery, and Economic Analysis to Support Decision-Making.]]></description><pubDate>Wed, 20 Aug 2025 13:34:39 GMT</pubDate><guid>http://pubsindex.trb.org/view/2591957</guid></item><item><title>Snapshots of Planning Practices</title><link>http://pubsindex.trb.org/view/2591956</link><description><![CDATA[NCHRP 08-128 Snapshots of Planning Practice adds to a body of work in which “snapshots” of practice are developed with a focus on current and emerging topics in transportation planning. The purpose of the Planning snapshots is to create a resource that is easily accessible and relevant to both practitioners and decision-makers. Snapshots serve as a resource for practice development and provide information for realistic practice implementation and program advancement. The Snapshots address the following topics: (1) Complete Streets - policies, methods, tools, and processes used by State Departments of Transportation (DOTs) and Metropolitan Planning Organizations (MPOs) to accommodate different modal uses of the roadway and roadway rights-of-way; (2) Data Sharing for Performance Management - strategies, methods, processes, and procedures for identifying, adopting, and sharing specific data and planning performance metrics; (3) Collaboration on Freight Delivery in Local Communities - successful collaborations between State DOTs, MPOs, local governments, and private sector freight providers to address the growing demands of goods movement; and (4) Economic Analysis to Support Decision-making - processes and tools used by State DOTs, MPOs, and local transportation agencies to assess and evaluate the economic value of transportation investments to inform decision-making. The Snapshots each feature four pages which provide information on the state of the practice area, key practices and levers of change, agency examples, and resources.]]></description><pubDate>Wed, 20 Aug 2025 13:34:39 GMT</pubDate><guid>http://pubsindex.trb.org/view/2591956</guid></item><item><title>Impact of Port Recentralization on Efficiency of Chinese Coastal Listed Port Companies</title><link>http://pubsindex.trb.org/view/2582695</link><description><![CDATA[Port governance has had a substantial impact on port operations. China launched the port-recentralization reform in 2015 to better allocate resources and improve efficiency. This was a reverse reform of port decentralization, and it is of great practical significance to assess its impact. This study empirically examines how port-governance recentralization affects port efficiency from the perspective of enterprise operation of listed port companies from 2010 to 2022. Using the super-efficiency slacks-based measure for efficiency analysis and the Tobit model for impact analysis, and decomposing the overall technical efficiency (TE) into pure technical efficiency (PTE) and scale efficiency (SE), it is found that: 1) the average values of TE, PTE, and SE first decreased and then increased, supporting the 2015 reform to some extent; 2) the establishment of provincial port groups (PPGs) increased PTE, but the changes in TE and SE were small; 3) the changes in corporate structure did not improve TE and PTE, but reduced SE. Because of the offsetting improvement in PTE and decrease in SE, port recentralization may not always increase overall efficiency. This study contributes by empirically revealing the complex micro-level effects of port-recentralization reform. It offers decision-making insights for port managers and related enterprises to maximize the positive effects of port reform on management and technology, while minimizing its negative effects on returns to scale.]]></description><pubDate>Thu, 07 Aug 2025 16:33:01 GMT</pubDate><guid>http://pubsindex.trb.org/view/2582695</guid></item><item><title>Relaxed Singly Constrained Static Traffic Assignment Model with Elastic Demand: Application to Telework and Urban Development Scenarios in Austin, Texas</title><link>http://pubsindex.trb.org/view/2577171</link><description><![CDATA[Increasing opportunities for telework and other forms of online activity participation are changing the landscape of transportation demand. This paper presents a relaxed singly constrained static traffic assignment model that extends existing approaches to accommodate both destination choice and the decision not to travel. We demonstrate that this formulation maintains desirable properties of existence and uniqueness of solutions, while being more flexible in capturing travel behaviors. A case study on the Austin, Texas, network examines scenarios related to telework adoption, targeted development in low-income areas, and changes to central business district attractiveness. Results show the model captures important behavioral shifts not reflected in simpler approaches such as models allowing destination choice or elastic demand alone. Using the relaxed singly constrained model, we demonstrate non-uniform traffic impacts across the network and find tradeoffs between congestion reduction and economic activity. The case study highlights potential equity impacts of both overall increases in telework and targeted changes in destination attractiveness that would otherwise be overlooked, suggesting that it is critical to develop more sophisticated models integrating traffic assignment with demand-side predictions.]]></description><pubDate>Tue, 22 Jul 2025 08:56:13 GMT</pubDate><guid>http://pubsindex.trb.org/view/2577171</guid></item><item><title>Economic Growth, Income Disparity, and Road Fatalities: Analyzing the Elderly-to-Younger-Adult Ratio Through Global Panel Data</title><link>http://pubsindex.trb.org/view/2559579</link><description><![CDATA[Prior research has demonstrated a Kuznets-curve relationship between road fatalities and per-person income. This indicates a positive correlation between road fatalities and income at lower levels of per-person income, while at higher levels of per-person income, the correlation is negative. Elder adults have more road crashes caused by cognitive and physical impairments, while younger adults have more accidents caused by inexperience and risk-taking driving. However, there has been no research conducted to investigate the correlation between per-person income and the ratio of road fatalities among elder adults compared with younger adults (ETYF). This study employed fixed effects panel regression techniques using data from 82 nations over 30 years to examine the effect of per-person gross domestic product (GDP) on the ETYF ratio and its underlying variables. The estimated results reveal a U-shaped relationship between the ETYF ratio and per-person GDP. This suggests that younger-adult fatalities are more prevalent in countries with lower levels of per-person GDP, whereas elder-adult fatalities become more prevalent as per-person GDP increases. Moreover, higher income disparity accelerates this transition at lower per-person GDP levels. The relationship between the ratio of motorcycle to passenger-car ownership (MPC) and the ETYF ratio follows a reverse U-shaped pattern. Interestingly, the ETYF ratio peaks at the inflection point where urban population density is higher and road options are fewer. The conclusion explores policy implications and strategies aimed at reducing mortality rates among both elderly and younger adults.]]></description><pubDate>Sun, 01 Jun 2025 18:15:43 GMT</pubDate><guid>http://pubsindex.trb.org/view/2559579</guid></item><item><title>Preferences for Electric Tricycles among Intermediate Public Transport Drivers in India: A Comprehensive Analysis of Demand-Side and Supply-Side Factors</title><link>http://pubsindex.trb.org/view/2556726</link><description><![CDATA[India’s transport sector, the third-largest greenhouse gas emitter globally, significantly affects carbon dioxide (CO2) emissions. Electric vehicles, particularly electric tricycles, have become crucial in intermediate public transport (IPT) services. However, there is a lack of effective strategies to increase the market penetration of electric tricycles, especially in developing countries. This study comprehensively investigates the factors influencing the adoption of electric tricycles among IPT drivers by combining demand-side factors (demographics, tricycle usage conditions, financing conditions, and electrification perspectives) and supply-side factors (operating cost and mileage efficiency). We conducted five stated preference experiments (SPEs) with Indian IPT drivers, resulting in a dataset of 2,623 valid responses used for multinomial logit (MNL) modeling analysis. The results show that reducing initial purchase cost and extending the maximum range of electric tricycles significantly increase adoption, especially among specific groups such as older, higher-income drivers with larger families. The study emphasizes the need for accessible financing options, robust charging infrastructure, and targeted awareness campaigns. Policy recommendations include financial incentives to reduce initial cost, investment in technology to improve efficiency and range of electric tricycles, and developing charging infrastructure to address range anxiety. Collaborative efforts between government agencies, financial institutions, and private enterprises are essential for creating a supportive ecosystem for electric tricycle adoption.]]></description><pubDate>Fri, 23 May 2025 15:34:42 GMT</pubDate><guid>http://pubsindex.trb.org/view/2556726</guid></item><item><title>Research on the Location of Cross-Border Logistics Hub for the Belt and Road Initiative</title><link>http://pubsindex.trb.org/view/2555900</link><description><![CDATA[To establish the cross-border logistics hub network for China's Belt and Road Initiative, this study proposes a multi-objective hub location model that integrates two novel metrics: hub network utilization rate and hub economic stimulating effect. These metrics are formulated to evaluate resource efficiency and regional economic growth potential, respectively, and are incorporated into the optimization framework. The model is solved using the non-dominated sorting genetic algorithm III (NSGA-III) with a training population, yielding a Pareto-optimal solution of 44 international logistics hubs across the Belt and Road regions, including Asia, Europe, West Africa, Oceania, and Central America. Results demonstrate that prioritizing these two objectives significantly enhances their performance: every time doubling the cost, the hub network utilization rate increases to 1.71 times and the hub economic stimulating effect rises to 1.60 times the baseline. This highlights the model's theoretical and practical value in improving resource efficiency and fostering sustainable economic development for the Belt and Road countries at lower costs. Key management insights include advancing cross-border railroads linking China and the Middle East to integrate the China Railway Express with East China, incorporating strategic ports in Oceania and North Africa into the “21st-Century Maritime Silk Road”, enhancing seaport hubs in South China and Southern Europe, and exploring direct routes between western China and South America. These measures aim to strengthen connectivity, optimize hub utilization, and amplify economic synergies across the Belt and Road network.]]></description><pubDate>Wed, 21 May 2025 16:25:05 GMT</pubDate><guid>http://pubsindex.trb.org/view/2555900</guid></item><item><title>Analysis of Transportation Carbon Emission Transfer Network and Influencing Factors in China</title><link>http://pubsindex.trb.org/view/2548868</link><description><![CDATA[Carbon emissions from the transportation sector exhibit significant mobility. To examine the transportation carbon emission transfer network and its influencing factors in China, the network is initially constructed using the environmentally extended multiregion input-output model. The local and overall features of the network’s structure are then analyzed. Finally, the quadratic assignment procedure (QAP) model is applied to assess the impact of factors such as urbanization rate, economic development, and transportation infrastructure. The findings are as follows: the total volume of transfers within the network has seen substantial growth, with Shanghai, Jiangsu, and Henan serving as key hubs. A weighted outward and inward flow distribution follows an “east–central–west” gradient. Centrality analyses reveal a distinct “core-periphery” structure. The network exhibits shorter average path lengths, higher average clustering coefficients, and reduced density. The number of provinces acting as brokers increased, while those in the net gain block decreased. Provinces tend to shift transportation carbon emissions through economic activities with other regions. Urbanization and economic development drive carbon emissions within the network, while transportation energy intensity mitigates them.]]></description><pubDate>Tue, 06 May 2025 09:11:49 GMT</pubDate><guid>http://pubsindex.trb.org/view/2548868</guid></item><item><title>Impacts of Bus Rapid Transit Introduction on Local Economy in a Developing City: A Case Study in Brasília</title><link>http://pubsindex.trb.org/view/2543554</link><description><![CDATA[This study investigated the economic impacts of bus rapid transit (BRT) on local economies in Brasília, Brazil, using a difference-in-differences method by matching 11 BRT stations. The degree of economic activity was represented by the yearly nighttime light (NTL) intensity at a grid-cell scale of 15 arcseconds (approximately 500?m grid cell size) from 2013 to 2019. The results indicated that BRT introduction had a significantly positive impact on NTL intensity around its stations. The robustness of this result was confirmed through parallel trend test, placebo test, and an endogeneity test using the instrumental variable method. Stratified analyses also revealed that the introduction of BRT had a significantly positive impact on local economies, notably in lower-income areas, and areas with a high level of green spaces. Moreover, the economic benefits were greater in areas where both BRT and local bus services operated, compared with areas served only by BRT. This study discusses policy implications for transportation planning, highlighting multimodal service availability in BRT network development.]]></description><pubDate>Tue, 29 Apr 2025 10:14:52 GMT</pubDate><guid>http://pubsindex.trb.org/view/2543554</guid></item><item><title>Local Only? The Regional Effect of the Metro</title><link>http://pubsindex.trb.org/view/2533798</link><description><![CDATA[In China, the feasibility of metros has been questioned because of concerns about their financial burden and their concentration in large cites. However, academics have shown greater tolerance, recognizing the extensive local externalities of metro systems. This paper contributes to the literature by extending the focus on metro externalities to the regional level. Firstly, based on the New Economic Geography theoretical framework, this paper hypothesizes that the presence of a metro in a large city can enhance the economic vitality of a smaller neighboring city. Secondly, using the Yangtze River Delta region of China as a case study, this paper employs the spatial Durbin model and the difference-in-differences model to demonstrate that a 1% increase in metro density in large cities correlates with a 3.6% increase in the density of new firms in smaller cities. Additionally, the density of new firms in the peripheral counties of smaller cities near the metro increases by 5.8%. The findings indicate that metro systems exert positive spillover effects at the regional level and do not monopolize the economic dynamism of smaller cities in China. Existing studies have undervalued the potential of metro externalities to enhance regional economic vitality. Therefore, it is recommended that the government consider relaxing restrictions on metro projects at an appropriate time in the future.]]></description><pubDate>Thu, 03 Apr 2025 16:31:16 GMT</pubDate><guid>http://pubsindex.trb.org/view/2533798</guid></item><item><title>ACRP Web-Only Document 53: Beyond the Runway: How Air Service Propels Regional Prosperity</title><link>http://pubsindex.trb.org/view/2448796</link><description><![CDATA[This article discusses the role of aviation in supporting local business activity and how airport officials can convey aviation's benefits to the community. It is based on Airport Cooperative Research Program (ACRP) Web-Only Document 53: Measuring and Understanding the Relationship Between Air Service and Regional Economic Development. This document includes case studies of 14 airports and regional economies across the U.S. The case studies assess how air service has changed in relation to regional economies based on socioeconomic measures. In addition, the case studies highlight the advantages of airports working closely with local economic development agencies and chambers of commerce. Connections between air service and business activity can be demonstrated by economic data, such as the input-output data collected by the U.S. Department of Commerce's Bureau of Economic Analysis, and through economic impact studies. In addition to economic impacts, Web-Only Document 53 suggests airports should consider presenting a more holistic view of what air service does for local economy by incorporating social impacts such as knowledge sharing, higher education, social connectivity, medical services and health, and disaster response.]]></description><pubDate>Tue, 07 Jan 2025 17:24:33 GMT</pubDate><guid>http://pubsindex.trb.org/view/2448796</guid></item><item><title>Analysis of the Influence of Transportation Infrastructure on Socio-Environmental Efficiency: Countries Case Studies</title><link>http://pubsindex.trb.org/view/2459108</link><description><![CDATA[The literature suggests that a country’s economic development is directly related to the efficiency of its transportation system. While the importance of a well-functioning transport system for economic growth and poverty reduction is widely acknowledged, there is limited quantitative research demonstrating this relationship. Many studies have separately applied data envelopment analysis (DEA) to analyze highways, airports, railways, and harbors. However, they have yet to analyze all modes and their relationship with economic development comprehensively. Consequently, this paper seeks to address this gap in the existing literature. The objective of this study is to demonstrate that transportation system. To this end, we employ DEA and consider a range of operational variables, including airports, railways, highways, and harbors. Furthermore, we examine the relationship between transportation efficiency and several economic and social indicators, including gross domestic product (GDP), human development index (HDI), and carbon dioxide (CO2) emissions from the transportation system. Our findings reveal that Brazil exhibits the lowest relative efficiency when compared with the G-7 countries and South America. Additionally, it demonstrates medium efficiency within the BRICS group (Brazil, Russia, India, China, and South Africa).]]></description><pubDate>Mon, 02 Dec 2024 12:49:31 GMT</pubDate><guid>http://pubsindex.trb.org/view/2459108</guid></item></channel></rss>