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    <title>Transport Research International Documentation (TRID)</title>
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    <atom:link href="https://trid.trb.org/Record/RSS?s=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" rel="self" type="application/rss+xml" />
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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>
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      <title>Transport Research International Documentation (TRID)</title>
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      <link>https://trid.trb.org/</link>
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    <item>
      <title>Network-Level Bridge Condition Degradation Prediction and Interpretation Analysis Based on a Hybrid Ensemble Model</title>
      <link>https://trid.trb.org/View/2701291</link>
      <description><![CDATA[Accurate prediction of network-level bridge conditions is crucial for informed maintenance decision-making. Traditional single algorithms struggle to extract bridge degradation features, leading to limited prediction accuracy. This study proposes a hybrid ensemble model approach that combines eXtreme Gradient Boosting (XGBoost), support vector regression (SVR), and artificial neural network (ANN) algorithms, significantly improving prediction performance. In addition, the SHapley Additive exPlanations (SHAP) method is utilized to analyze key influencing factors on bridge degradation, providing interpretability to the model’s predictions and offering valuable references for maintenance strategies. First, this study integrates inspection reports, design drawings, maintenance records, and technical condition ratings of 800 bridges to construct a comprehensive database. In total, 12 features, including bridge type, age, maximum span, maintenance frequency, and traffic volume, are extracted as inputs, with condition ratings as the output. Second, XGBoost, SVR, and ANN models are employed, and two hybrid ensemble models: (1) Inverse-Variance Weighted Hybrid Ensemble Prediction (HEP-IV), using inverse-variance weighting; and (2) artificial neural network-based Hybrid Ensemble Prediction (HEP-ANN), a meta-learner, are developed and tested for prediction accuracy. These models are tested for prediction accuracy. Finally, the SHAP method is applied to identify important factors, such as bridge age, maintenance frequency, and deck width, as well as their interactions. Experimental results indicate that the hybrid ensemble model (HEP-IV) outperforms other models, showing superior prediction accuracy and better generalization ability, with HEP-IV achieving the best performance across all evaluation metrics. The coefficient of determination for the test set is 0.982, the root mean square error is 0.066, and the mean absolute error is 0.04. The model’s interpretability quantifies the effect of key factors, enabling precise prioritization of maintenance interventions, which supports optimized budget allocation and policy-making for bridge network management.]]></description>
      <pubDate>Wed, 13 May 2026 17:00:16 GMT</pubDate>
      <guid>https://trid.trb.org/View/2701291</guid>
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    <item>
      <title>Long-term wear resistance performance of asphalt pavements under multiple coupled factors based on indoor abrasion tests</title>
      <link>https://trid.trb.org/View/2666324</link>
      <description><![CDATA[To effectively address the issues of wear and accelerated distress development and the reduction of driving safety and service life in asphalt pavements during long-term service, a new indoor accelerated wear test device is developed to systematically evaluate the evolution of long-term wear resistance in asphalt pavements from the perspectives of material properties, vehicle factors, and environmental conditions. The intrinsic correlation mechanisms between surface morphology changes and wear performance degradation are elucidated, and an optimal predictive model for the thickness loss rate is established based on machine learning. The long-term wear resistance of asphalt pavements is shown to have three distinct evolving stages: slow decline, rapid decline, and stabilization. Pavements with larger aggregate sizes and well-graded structures demonstrate significantly superior wear resistance. Among different aggregate lithologies, the long-term wear resistance follows the order of HLY (Diabase) > HGY (Granite) > SHY (Limestone). Regarding gradation types, the stone mastic asphalt (SMA)-graded pavements demonstrated the highest wear resistance, followed by the asphalt concrete (AC)-graded pavements; while the open-graded friction course (OGFC)-graded pavements exhibit relatively-poor performance. Under the high-temperature conditions (60℃), the pavement damage is diverse and severe (e.g., cracks, rutting, and depressions); whereas under the low-temperature conditions (0℃), the damage is relatively simple, mainly characterized by the particle loss and aggregate fragmentation. The machine learning analysis revealed that the XGBoost model performs the best in terms of error control and fitting accuracy and the aggregate lithology, gradation type, and temperature are the primary factors influencing the long-term wear resistance of asphalt pavements. The developed test device and predictive model can accurately simulate and forecast the wear performance degradation of asphalt pavements over different service years under indoor conditions, with high prediction accuracy.]]></description>
      <pubDate>Mon, 11 May 2026 08:50:46 GMT</pubDate>
      <guid>https://trid.trb.org/View/2666324</guid>
    </item>
    <item>
      <title>Flood Inundation-Induced Bridge Pressure Scour: Developing New Prediction Equations and Exploring Machine-Learning Methods</title>
      <link>https://trid.trb.org/View/2663201</link>
      <description><![CDATA[Bridge pressure scour occurs when the bridge deck is inundated during a flood event, causing significant threats to the stability of local streambeds and bridge foundations. In the present study, new flume experiments were conducted to investigate the influence of the flow intensity, bridge deck clearance height, bridge deck thickness, and bridge deck longitudinal length on pressure scour depth. A comprehensive pressure scour dataset was assembled, using the new experimental data and existing data from the literature, to examine detailed parameter dependencies on scour depth and derive new empirical predictive equations. During this process, XGBoost, a machine learning (ML) model, was also developed using the dataset to assist parameter analysis, primarily as a parameter analyzer to corroborate variable selection and functional dependencies, and secondarily to provide an alternative, data-driven approach to scour prediction. The results show that, by using the newly proposed equations, 47% data are within the ±20% accuracy range, while the rate for over 20% underestimation was below 12%. This performance is significantly better than the existing methods and is beneficial in its theoretical framework. While the ML model attains strong predictive accuracy, we recommend treating it as a diagnostic parameter-analysis tool at the current stage rather than a reliable design method; the lack of a physical basis limits its generalizability and makes it important to exercise extra caution in practice. Finally, future research directions are discussed in this paper, particularly the future fusion of conventional empirical methods and ML models.]]></description>
      <pubDate>Fri, 01 May 2026 14:33:17 GMT</pubDate>
      <guid>https://trid.trb.org/View/2663201</guid>
    </item>
    <item>
      <title>Railway ballast fouling detection using thermal imaging: integration of LSTM and XGBoost</title>
      <link>https://trid.trb.org/View/2649849</link>
      <description><![CDATA[This paper presents an artificial intelligence (AI)-based approach to automate the structural health monitoring (SHM) of railway ballast through the fusion of long short-term memory and XGBoost (LSTM-XGB) to surface temperature data derived from infrared thermal images. In this context, machine learning models are trained using remotely acquired surface temperature data to classify fouling index based on thermal variations within ballast aggregates captured from thermograms. The long short-term memory (LSTM) component processes sequential time-series thermal data to predict preceding values, and the XGBoost (XGB) component classifies fouled ballast conditions based on identified patterns of surface temperature variations measured via infrared thermography (IRT). The results confirm the capability of the LSTM component to capture the time-series variations of a specimen’s surface temperature in a shorter timeframe as well as the superior performance of XGBoost compared to a random forest (RF) approach, in classifying fouled ballast conditions. Therefore, the LSTM-XGB model demonstrates higher efficiency compared to the standalone XGBoost model, since the predictive nature of LSTM over time-series temperature data enables capturing shorter time window for measuring ballast surface temperature and identifying patterns. Moreover, establishing a coarser classification of ballast fouling (categorized into three groups instead of five) significantly improves the model capability for accurate assessment of the ballast fouling conditions.]]></description>
      <pubDate>Tue, 28 Apr 2026 11:20:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/2649849</guid>
    </item>
    <item>
      <title>How does home-based teleworking reshape commuting and activity participation? An empirical study in Shanghai using machine learning</title>
      <link>https://trid.trb.org/View/2654574</link>
      <description><![CDATA[Despite the growing adoption of teleworking, empirical studies remain limited in developing nations, including China. However, the rapid rise of teleworking, accelerated by the COVID-19 pandemic, highlights the need to understand its impacts. This study examines how teleworking influences commuting behavior and time reallocation, identifying key factors and their effects. Using survey data from Shanghai, we first analyze commuting differences across teleworking patterns, revealing significant effects on travel modes, departure times, weekly commuting days, and trip-chaining complexity. We then develop XGBoost models to investigate how individuals reallocate saved commuting time across four activity types: in-home, out-of-home mandatory, leisure, and maintenance activities. SHAP and Partial Dependence Plot analyses identify four core factors—age, daily Internet use, commercial housing density, and company density—as critical determinants of activity choices. The findings suggest that while teleworking may reduce commuting trips, it primarily restructures travel patterns rather than simply decreasing trip frequency. These findings will help transport planner develop adaptive measures to accommodate evolving mobility behaviors in an increasingly telework-oriented society.]]></description>
      <pubDate>Tue, 21 Apr 2026 14:30:17 GMT</pubDate>
      <guid>https://trid.trb.org/View/2654574</guid>
    </item>
    <item>
      <title>Modeling spatial and temporal urban environmental noise using street view imagery and machine learning</title>
      <link>https://trid.trb.org/View/2655683</link>
      <description><![CDATA[This study proposes a framework for modeling environmental noise pollution by integrating land use regression (LUR) with machine learning models and street built environments. Using noise data collected from 128 locations over nine consecutive days in Mississauga, Ontario, Canada, the research demonstrates that incorporating finer-scale street built environment features derived from street view images significantly improves noise prediction accuracy. The model using XGBoost and street view-derived variables significantly outperforms traditional LUR-based models. The results indicate that street-level characteristics, particularly terrain, play a critical role in modeling noise levels, complementing traditional land use and NDVI-based greenness. Furthermore, the research highlights the importance of using non-linear models like XGBoost to capture complex relationships between noise and urban features. This approach offers valuable insights for advancing environmental noise modeling, which further supports future public health studies investigating the impact of noise exposure on population health.]]></description>
      <pubDate>Tue, 21 Apr 2026 14:30:17 GMT</pubDate>
      <guid>https://trid.trb.org/View/2655683</guid>
    </item>
    <item>
      <title>XGBoost–LSTM Regional Traffic Congestion Ratio Prediction Integrating Spatio-Temporal and Weather Features</title>
      <link>https://trid.trb.org/View/2686151</link>
      <description><![CDATA[Urban traffic prediction is of great significance for traffic management and optimisation. Although research on predicting indicators such as traffic flow and speed is relatively sufficient, research on forecasting congestion ratios in different urban regions remains inadequate. Based on traffic big data, this paper proposes a fusion regional congestion ratio prediction model integrating eXtreme gradient boosting tree (XGBoost) and long short-term memory (LSTM), which integrates multi-source features, including temporal, meteorological, and spatial factors. First, the XGBoost algorithm is used to model the historical congestion ratios and related features of each region, obtaining preliminary prediction results and extracting regional residual sequences; subsequently, the residual sequences are input into the LSTM network for error correction. Finally, the prediction results of the two stages are fused to obtain more refined regional congestion ratio predictions. Experimental results show that during peak hours on weekdays, taking Region 49 as an example, the MAE of the fusion model is 0.062, the mean absolute percentage error is below 30%, and the comprehensive prediction accuracy reaches up to 72%; under complex weather conditions, for the same region, the RMSE values of the fusion model are 0.048, 0.058, and 0.043, respectively, which are 37%–63% lower than those of the XGBoost model used alone. Feature ablation experiments further verify the key role of temporal, meteorological, and spatial features in improving prediction performance, among which spatial features contribute the most to performance optimisation. This study improves the research framework in the field of urban traffic prediction and provides a theoretical basis and methodological support for regional traffic management practices.]]></description>
      <pubDate>Tue, 14 Apr 2026 10:09:15 GMT</pubDate>
      <guid>https://trid.trb.org/View/2686151</guid>
    </item>
    <item>
      <title>Analyzing the Nonlinear and Interaction Effects Mechanisms of Factors Influencing Intercity Travel Route Choice by Passenger Car Drivers: A Case Study from Guangxi, China</title>
      <link>https://trid.trb.org/View/2691017</link>
      <description><![CDATA[Although travel route choice analysis is abundantly conducted using statistical models, some shortcomings, such as easy neglect of nonlinear effects among factors, and subjective assumptions in modeling, are apparent. This study provides an interpretable framework based on machine learning models to better analyze the travel route decisions of intercity travelers. Four types of travel route choice behavior analysis models (i.e., extreme gradient boosting [XGBoost], Light gradient boosting machine, random forest, and the binary logit model) were conducted using travel survey data for passenger car drivers in Guangxi, China, in 2021. The model parameters showed that XGBoost achieved the highest prediction accuracy (89.8%). Based on objective data distribution, the Shapley additive explanation approach was used to explain the output of XGBoost. The results showed that vehicle types, passenger capacity, expected toll discounts, and travel frequency on freeways had nonlinear effects on travel route choice, while traditional statistical models could not identify the nonlinear effects because of the effect of data distribution. Travel route choice was affected by potential interaction effects (e.g., vehicle types and toll payers). There were differences in the contribution of the same factor (e.g., education level) to route choice for different vehicle groups. These findings help better understand the generative mechanisms of travel route choice from a more objective perspective and provide references for developing more effective strategies to alleviate intercity road congestion and improve road network capacity by guiding travelers’ route choices.]]></description>
      <pubDate>Fri, 10 Apr 2026 16:00:16 GMT</pubDate>
      <guid>https://trid.trb.org/View/2691017</guid>
    </item>
    <item>
      <title>Extreme buffeting response of long-span bridges under probabilistic wind field: Environmental contours vs. brute-force Monte Carlo approaches</title>
      <link>https://trid.trb.org/View/2652502</link>
      <description><![CDATA[Turbulence parameters, which exhibit substantial uncertainty, are often disregarded in extreme buffeting evaluations. This study examines the long-term extreme buffeting response of a long-span bridge under a probabilistic wind field. First, the mean and turbulent wind field is analyzed to construct wind environmental contours. Then, a machine learning-based surrogate model using eXtreme Gradient Boosting (XGBoost) is employed to efficiently predict buffeting responses while reducing computational costs. Two strategies for computing long-term extreme buffeting responses are examined: (1) response evaluation along wind environmental contours and (2) direct estimation of annual extreme responses using Monte Carlo simulation (MCS) and the surrogate model. Results demonstrate that turbulence parameter uncertainty has a significant impact on the buffeting responses of the Xihoumen Bridge, with maximum torsional and vertical responses occurring under different wind conditions. Moreover, long-term extreme wind environment parameters do not always correspond to long-term extreme structural responses, underscoring the necessity of incorporating multiple turbulence parameters to accurately characterize wind-induced effects. The environmental contour method offers an effective hazard-oriented design strategy, and future work could explore the response-oriented design approaches that directly target structural performance.]]></description>
      <pubDate>Fri, 03 Apr 2026 12:12:45 GMT</pubDate>
      <guid>https://trid.trb.org/View/2652502</guid>
    </item>
    <item>
      <title>Metaheuristic-optimized XGBoost model for accurate prediction of rock fragmentation in mining projects</title>
      <link>https://trid.trb.org/View/2644138</link>
      <description><![CDATA[Rock fragmentation plays a critical role in determining the cost of a mining project, as the expenses related to loading, hauling, and crushing the fragmented rock directly impact the overall project cost. Conventional methods for evaluating fragmentation, such as Kuz–Ram models, size-distribution functions, and classical comminution laws, often fall short. These methods do not consider the complex interactions among geology, blast design, and timing. Even the Modified Kuz–Ram model, which includes the Blastability Index, performs inconsistently in jointed and heterogeneous rock conditions. Therefore, the present research introduces a new optimized extreme gradient boosting (XGBoost) model by comparing the Arithmetic Optimization (AOA), Brainstorm Optimization (BOA), Quantum-inspired Evolutionary (QEA), Tiki-Taka Optimization (TTA), and Whale Optimization (WOA) algorithms optimized XGBoost models to predict rock FGT. For that purpose, the database was collected from the opencast Mine of Ramagundam, Telangana, India. This investigation uses spacing-to-burden ratio, total explosive, firing pattern, joint angle, and maximum charge per delay (Q) as features to assess the rock FGT. This investigation has analyzed the accuracy and reliability of the optimized XGBoost models using ten performance metrics, QQ plot, regression error characteristics, generalizability analysis, reliability indexes, overfitting analysis, and Anderson-Darling test. Finally, the TTA_XGBoost model outperformed the AOA, BOA, QEA, and WOA-optimized XGBoost models with a Deviation of Runoff Volume (DRV) of 0.0872, Kling-Gupta Efficiency (KGE) of 0.7784, Kullback Leibler Divergence (KLD) of 0.4348, and Jensen Shannon Divergence (JSD) of 0.0997. The Local Interpretable Model-Agnostic Explanations (LIME) analysis reveals that the joint angle and maximum charge per delay (Q) features significantly impact the rock FGT assessment. Also, it was observed that the optimized XGBoost model achieves over 95% performance when the features are weakly multicollinear.]]></description>
      <pubDate>Tue, 17 Mar 2026 09:48:46 GMT</pubDate>
      <guid>https://trid.trb.org/View/2644138</guid>
    </item>
    <item>
      <title>Shared electric scooter energy consumption modeling and influencing factor analysis</title>
      <link>https://trid.trb.org/View/2659444</link>
      <description><![CDATA[The convenience and sustainability of shared electric scooters (e-scooters) position them as an emerging and popular form of micromobility. However, their environmental and energy benefits are still a matter of debate. A reliable and accurate estimation of e-scooter energy consumption (i.e., battery depletion) is required to evaluate e-scooter energy and environmental impacts. The shared e-scooter data in the city of Charlotte, North Carolina, provides an opportunity to explore potential influencing factors and model e-scooter energy consumption. This study developed an XGBoost-based e-scooter energy consumption model that captures non-linear relationships among influencing factors and quantifies their contributions in supporting modeling under varying data availability conditions. The proposed e-scooter energy classification model achieves an overall accuracy of up to 73.73%. It is found that Trip Distance, Trip Duration, Grade, Start Battery Percentage, Temperature and Standard Deviation of Speed are the most important features. The model accuracy under different trip distance ranges and with different descriptive variables is evaluated.]]></description>
      <pubDate>Thu, 26 Feb 2026 09:22:44 GMT</pubDate>
      <guid>https://trid.trb.org/View/2659444</guid>
    </item>
    <item>
      <title>Strain field reconstruction of stiffened panels under sparse sensor configurations</title>
      <link>https://trid.trb.org/View/2633960</link>
      <description><![CDATA[The Inverse Finite Element Method (IFEM) is effective for advanced structural health monitoring (SHM) systems in intelligent vessels. However, sparse sensor configurations in practical engineering applications degrade the reconstruction accuracy of IFEM. Thus, this study proposes a structural strain field reconstruction method with introducing Extreme Gradient Boosting (XGBoost) base on IFEM. The strain data collected from sensors are firstly used as training samples to predict strain values at unmeasured locations through the XGBoost regression model. Subsequently, the pseudo-stiffness matrix and pseudo-load vector are assembled to compute the global displacement and strain fields incorporating the predicted values. The proposed reconstruction method is validated through model testing and numerical simulations on stiffened panels. The results demonstrate that the proposed method achieve high accuracy in strain field reconstruction under sparse sensor configurations, while being adaptable to complex loading conditions and various sensor arrangement schemes. This study effectively improves strain field reconstruction accuracy under sparse sensor configurations and provides theoretical guidance for optimal sensor placement.]]></description>
      <pubDate>Mon, 23 Feb 2026 11:24:29 GMT</pubDate>
      <guid>https://trid.trb.org/View/2633960</guid>
    </item>
    <item>
      <title>The use of Ground Penetrating Radar and artificial intelligence for automated railway trackbed stratigraphy and Ballast Fouling assessment</title>
      <link>https://trid.trb.org/View/2642429</link>
      <description><![CDATA[Intrusive trenching and coring remain the reference for railway trackbed diagnosis but lack coverage and repeatability. This paper proposes a hybrid GPR–AI framework that automates the detection of dielectric interfaces and the estimation of ballast permittivity and thickness. Synthetic FDTD simulations are used to evaluate Mask Region-based Convolutional Neural Network (Mask R-CNN) for interface segmentation and XGBoost (gradient-boosted trees)/Support Vector Regression(SVR) for layer-wise regression. Results on controlled data confirm high interface detection accuracy (IoU ≈ 0.81) and robust estimation of shallow dielectric parameters (R²>0.9), while sequential conditioning markedly improves deeper-layer predictions. Validation on field measurements acquired with a broadband (40–3000 MHz) GPR antenna array demonstrates good transferability of the methodology, with reliable stratigraphy reconstruction and dielectric-based material attribution along an operational track section. The framework unifies stratigraphy and fouling assessment in a single automated workflow, offering a scalable and interpretable alternative to invasive methods and paving the way for predictive maintenance at the network scale.]]></description>
      <pubDate>Thu, 19 Feb 2026 09:44:15 GMT</pubDate>
      <guid>https://trid.trb.org/View/2642429</guid>
    </item>
    <item>
      <title>RNN-XGBoost Integration into Digital Twins for Predicted Travel Time Geosimulation in Emergency Route Finding</title>
      <link>https://trid.trb.org/View/2642277</link>
      <description><![CDATA[The effective addressing of urban traffic, especially for the acceleration of emergency response within urban environments, represents a critical challenge in the fields of transportation and urban crisis management. Previous studies have primarily focused on traffic modeling and travel time prediction, with limited emphasis on emergency relief consequences and the use of simulation technologies for optimizing the routing of emergency vehicles. This research makes a significant contribution to the field by introducing a digital twin (DT)-based geosimulation, which is particularly useful for predicting emergency routing. The aim is to evaluate the efficacy of this model in comparison to conventional routing on Google Maps. On the other hand, this research develops a novel ensemble model using recurrent neural networks (RNN) and the eXtreme Gradient Boosting (XGBoost), named RNN-XGBoost. This study assesses the efficacy of the hybrid model in comparison to other widely utilized models, including Long Short-Term Memory (LSTM) networks, Graph Neural Network (GAN), as well as RNN and XGBoost in standalone mode. Such deep learning (DL) model has a pivotal role in assigning weights to route graphs in online maps, and integrating these outputs into the DT system to simulate optimal routing. In this regard, traffic time series data from Google Maps and other sources was collected, incorporating parameters such as date, type of day (weekday or holiday), time of day, traffic flow rates, weather conditions, accidents, and congestion points to estimate travel times. Findings suggest that the RNN-XGBoost framework demonstrated outstanding performance, attaining an R² value of 0.97 for the training dataset and 0.95 for the testing dataset, alongside a test-loss of 0.0012, justifying its selection for DT integration. A dedicated DT architecture was developed using components such as Mapbox for visualization, OpenStreetMap (OSM) for base maps, PGRouting for GIS-based network analysis, and PostgreSQL for spatial analysis and database management. A series of accident scenarios were simulated to demonstrate that the system is capable of predicting alternative routes with superior travel times in comparison to those predicted by Google Maps routing. Effectiveness of the DT system in emergency vehicle routing optimization was presented by the statistical evaluation using the paired t-test. The results of this study could greatly enhance the management of urban traffic, facilitating faster emergency responses and reducing the loss of life and resources in intercity accidents.]]></description>
      <pubDate>Wed, 18 Feb 2026 08:51:10 GMT</pubDate>
      <guid>https://trid.trb.org/View/2642277</guid>
    </item>
    <item>
      <title>An Optimization Model for Support Parameters of Arch Cover Method in Underground Station Excavation Based on Gradient-Boosted Regression and Metaheuristic Optimization</title>
      <link>https://trid.trb.org/View/2651391</link>
      <description><![CDATA[The design of support structures for large-span metro stations constructed by the arch cover method in upper-soft and lower-hard strata presents a complex, multi-constrained optimization problem. Conventional design approaches often struggle to balance stringent deformation control and cost-effectiveness. This study proposed a hybrid intelligent optimization framework to address this challenge. First, a comprehensive dataset of 300 numerical simulation cases was systematically generated using a Latin hypercube sampling design. Based on this dataset, an XGBoost-based surrogate model was established. Its hyperparameters were fine-tuned using the Quadruple Parameter Adaptation Growth Optimizer (QAGO), which significantly improved its predictive accuracy. Subsequently, a novel hybrid metaheuristic algorithm was proposed by adaptively combining the Slime Mould Algorithm (SMA) and the Honey Badger Algorithm (HBA), and further enhanced with a chaotic mapping strategy to bolster its global search capabilities. This optimizer utilized the surrogate model to identify cost-effective support parameters that satisfied predefined safety constraints. Performance evaluation showed that the QAGO-tuned XGBoost model’s coefficient of determination (R²) for surface settlement prediction increased from a baseline of 0.320 to 0.723. The chaos-enhanced SMA-HBA algorithm consistently outperformed standalone metaheuristic algorithms, generating support schemes that were validated through numerical simulations as both safe and economical.]]></description>
      <pubDate>Thu, 29 Jan 2026 17:01:58 GMT</pubDate>
      <guid>https://trid.trb.org/View/2651391</guid>
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