<?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" 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>Evaluation of Machine Learning and Deep Learning Models for Multi-Horizon Crowd Forecasting at Scheveningen Beach, The Netherlands</title><link>http://pubsindex.trb.org/view/2686655</link><description><![CDATA[Efficient crowd management is crucial for municipalities to ensure public safety and enhance visitor experience, particularly in tourist-centric areas, such as Scheveningen Beach. Scheveningen Beach faces challenges because of the limited precision of visitor count data and the lack of accurate forecasts. Currently, crowd safety managers use their professional experience to forecast based on factors such as weather, events, and holidays, leading to inaccuracies, highlighting the need for accessible data and advanced analytics to enhance crowd management strategies. This study evaluates machine learning and deep learning models for multi-horizon hourly pedestrian crowd count forecasting, addressing the limitations of current manual prediction methods. Historical crowd data, weather, and holidays were integrated to train eXtreme gradient boosting, categorical boosting (CatBoost), light gradient boosting machine (LightGBM), long short-term memory (LSTM), and Temporal Fusion Transformer models for short-term (1-day), mid-term (7-day), and long-term (30-day) horizons. Models were developed for individual locations and as a unified multilocation approach. Performance was assessed using the coefficient of determination, root mean square error, normalized root mean square error, symmetric mean absolute percentage error, mean absolute error, and normalized mean absolute error metrics. The results showed that CatBoost was best for short-term forecasts, CatBoost and LightGBM for mid-term forecasts, and LSTM and LightGBM for long-term forecasts. Forecast performance decreases over longer time horizons in many locations, suggesting different applications: short-term forecasts for immediate operational decisions and long-term predictions for general trend analysis and strategic planning. Individual location models generally outperformed the unified approach, but at a higher computational cost. This study reveals significant spatial and temporal variability in crowd dynamics, which is crucial for optimizing resource allocation and enhancing preparedness in crowd management at Scheveningen Beach and similar tourist destinations.]]></description><pubDate>Thu, 02 Apr 2026 15:23:59 GMT</pubDate><guid>http://pubsindex.trb.org/view/2686655</guid></item><item><title>Trafficability Study of Full-Scale Geosynthetic Portable Road Building System</title><link>http://pubsindex.trb.org/view/2137655</link><description><![CDATA[This study describes the full-scale traffic evaluation of a prototype submersible matting system (SUBMAT) at a test site on the U.S. Army Engineer Research and Development Center’s campus in Vicksburg, MS. The SUBMAT prototype was designed to bridge the gap between high- and low-tide at a beach interface to enable 24-h vehicle offloading operations at an expeditionary watercraft landing site. This unique system is made from common geotextile materials, is filled with indigenous sand using simple commercially available pumps, and creates a robust driving surface. The results of the study showed that the SUBMAT system was able to sustain an accumulation of 1,000 Medium Tactical Vehicle Replacement, 350 Heavy Expanded Mobility Tactical Truck, and over 150 M1A1 main battle tank passes without experiencing any significant damage. The ease of deployment, relatively low cost, and trafficability results could make the SUBMAT a suitable candidate for expedient low-volume roads in austere environments such as stream beds, low-water crossings, recently flooded or flood prone areas, and areas with weak soil.]]></description><pubDate>Fri, 17 Mar 2023 15:31:46 GMT</pubDate><guid>http://pubsindex.trb.org/view/2137655</guid></item><item><title>BEACH NOURISHMENT AND PROTECTION</title><link>http://pubsindex.trb.org/view/681178</link><description><![CDATA[The National Research Council convened the Committee on Beach Nourishment and Protection, under the auspices of the Marine Board, to conduct a multidisciplinary assessment of the engineering, environmental, economic, and public policy aspects of beach nourishment to provide an improved technical basis for judging the use of beach nourishment and protection technology in shoreline stabilization, erosion control, recreational beach creation, dredged material placement, construction of coastal storm barriers, and protection of natural resources.  The committee reviewed available data and literature and conducted site visits to determine the state of practice of beach nourishment.  The committee also solicited data and views and met with expert practitioners and researchers in federal, regional, and local government agencies; researchers and practitioners in the coastal engineering community; and members of professional societies.  This report was prepared for policy and project decision makers; members of the coastal and civil engineering communities concerned with beach nourishment and shoreline protection; scientists and engineers concerned with prediction, design, construction, and maintenance of beach nourishment projects; and the general public.  The report is presented in seven chapters and nine appendixes.  Chapter 1 introduces the beach nourishment concept, discusses regional differences in physical processes, and frames the issues associated with project decision making.  Chapter 2 identifies and discusses management issues.  Chapter 3 discusses the roles and responsibilities of federal agencies relative to shoreline protection and the application of beach nourishment.  Chapter 4 describes and assesses the state of practice in design and prediction.  Chapter 5 describes environmental issues, assesses monitoring capabilities and needs, and discusses improvements in the state of practice.  Chapter 6 discusses physical, economic, and environmental monitoring in the planning, design, and performance assessment of beach nourishment projects.  Chapter 7 presents the committee's conclusions and recommendations.  Appendix A provides biographical sketches of committee members.  Case studies of specific projects are cited in Appendix B.  Appendixes C through I provide technical descriptions and analyses of prediction, design, economic analysis, construction, environmental considerations, and monitoring.]]></description><pubDate>Fri, 27 Feb 2004 00:00:00 GMT</pubDate><guid>http://pubsindex.trb.org/view/681178</guid></item><item><title>SHORELINE CLEANUP COST MODELING REPORT</title><link>http://pubsindex.trb.org/view/717416</link><description><![CDATA[This report begins with some important points to remember about shoreline cleanup, discusses some general issues involved in shoreline cleanup costs, outlines the basic methodologies for estimating shoreline cleanup costs, presents historical spill data on shoreline cleanup costs, and looks at estimating costs by estimating work involved in shoreline cleanup.  The report then examines shoreline cleanup costs for oil spill scenarios selected by the National Research Council Transportation Research Board Committee on Evaluating Alternative Tanker Designs.  Included in this examination are shoreline cleanup cost estimates based on (a) shoreline area coverage, (b) shoreline length, (c) gallons of oil on the shoreline, and (d) shoreline length oiled and total gallons spilled.]]></description><pubDate>Tue, 19 Feb 2002 00:00:00 GMT</pubDate><guid>http://pubsindex.trb.org/view/717416</guid></item><item><title>CORRIDOR PRESERVATION IN DELAWARE</title><link>http://pubsindex.trb.org/view/636053</link><description><![CDATA[In 1990, the Delaware Department of Transportation (DelDOT), in conjunction with the Federal Highway Administration, began implementation of a project to protect and improve capacity on a 64 kilometer length of State Road 1 (SR-1), between Dover and Rehoboth Beach, Delaware. This roadway passes through mostly rural countryside, however, there are several pockets of residential and commercial development. SR-1 is the main access to the Delaware beaches from the North, and a new controlled access roadway is in various stages of completion between Wilmington and Dover. This paper relates the actions that DelDOT and the two County governments have taken to control existing and proposed expanded access adjacent to Sr-1 over the past several years. The paper also describes a concurrent effort to purchase property rights that will reduce development pressures.]]></description><pubDate>Wed, 30 Sep 1998 00:00:00 GMT</pubDate><guid>http://pubsindex.trb.org/view/636053</guid></item><item><title>BENEFICIAL USES OF DREDGED MATERIAL</title><link>http://pubsindex.trb.org/view/463158</link><description><![CDATA[Dredged material is a manageable resource suitable for a wide variety of uses.  Thousands of cases of such uses have been documented in North America.  Urban managers, land use planners, and engineers recognize the contribution of this resource to the establishment of new parkland; expansion of ports, airports, and other infrastructure foundations; and availability of topsoil for parks, golf courses, and landfills.  Conservationists see the benefits of dredged material in restoring degraded or lost habitat and in some cases creating new habitat.  The opportunities of innovative uses by entrepreneurs are unlimited. This article provides further details on the use of dredged material in the following areas:  commercial, industrial, and urban uses; recreational grounds and beaches; natural resources - wetlands and habitats; agriculture uses; and manufactured soil.]]></description><pubDate>Wed, 10 Jul 1996 00:00:00 GMT</pubDate><guid>http://pubsindex.trb.org/view/463158</guid></item><item><title>APPLICATION OF MECHANICAL STABILIZATION TO AN ARTIC BEACH</title><link>http://pubsindex.trb.org/view/128136</link><description><![CDATA[BEACHES IN SOME ARCTIC AREAS AFFORD NATURAL ROUTES FOR SUMMER TRANSPORTATION, SINCE THE TUNDRA IS THEN IMPASSIBLE TO CONVENTIONAL RUBBER TIRED VEHICLES. IN THE VICINITY OF POINT BARROW, ALASKA, THE BEACH MATERIALS HAVE BEEN ROUNDED AND SORTED INTO SIZE GRADES BY GEOLOGIC AGENCIES OF TRANSPORTATION. THE ROUNDED SAND GRAINS AND THE UNIFORM PARTICLE SIZE GIVE THE BARROW BEACH SANDS A LOW TRAFFICABILITY AND ONE WHICH CONSTITUTES AN ENGINEERING PROBLEM IN AN AREA OF POTENTIAL STRATEGIC IMPORTANCE. A POSSIBLE SOLUTION TO THE BARROW BEACH ROAD PROBLEM IS TO STABILIZE THE BEACH SAND BY ADMIXING LOCALLY AVAILABLE BINDER MATERIALS. AT LEAST TWO MAJOR PROBLEMS ARE ASSOCIATED WITH THE UTILIZATION OF BINDER SOIL DEPOSITS. FIRST, THE PRESENCE OF PERMAFROST PROHIBITS ORDINARY EXCAVATION OF A BINDER MATERIAL BELOW A DEPTH OF 1 TO 3 FEET, DEPENDING UPON THE DEPTH OF SUMMER THAW. SECOND, THE ARCTIC CLIMATE RESTRICTS CHEMICAL WEATHERING AND SOIL PROFILE FORMATION SO THAT THOSE BINDER MATERIALS WHICH ARE AVAILABLE CONTAIN LARGE AMOUNTS OF FINELY GROUND PEAT BUT VERY LITTLE MINERAL CLAY. IT WAS FOUND THAT EXTRA AMOUNTS OF BINDER PRODUCED HIGHER STRENGTH IN THE COMPACTED MIXES. LABORATORY TESTS INDICATE THAT WITH OPTIMUM AMOUNTS OF A TUNDRA CLAY AND ICE-RAFTED BEACH GRAVEL, THE SOAKED CBR OF THE COMPACTED BEACH MATERIAL IS INCREASED APPROXIMATELY TEN TIMES, FROM 3 TO 31. HOWEVER, FOR SOME PURPOSES, THIS IS NOT HIGH ENOUGH, AND OTHER BINDERS ARE NOW BEING INVESTIGATED. A SHORT DISCUSSION OF THESE IS INCLUDED IN THE PAPER. /AUTHOR/]]></description><pubDate>Thu, 26 May 1994 00:00:00 GMT</pubDate><guid>http://pubsindex.trb.org/view/128136</guid></item><item><title>RUTTING PREDICTION IN ASPHALT CONCRETE PAVEMENTS</title><link>http://pubsindex.trb.org/view/58745</link><description><![CDATA[The state-of-the-art paper summarizes a number of procedures to either limit rutting to some specific amount or to estimate the expected quantity from repetitive traffic loading.  Two methods are suggested for estimating permanent deformation from long-term loading.  From a design standpoint, the procedue for limiting the rutting to some prescribed amount that is based on a limiting subgrade strain criterion is the procedure that could be used with more confidence since these criteria have been developed from analysis of existing design procedures and field trials.  On the other hand, the methodology described for the estimation of the actual amount of rutting from laboratory repeated load or creep tests and either elastic or viscoelastic layered theory will require field documentation before it can be used with confidence. Nevertheless, such procedures can be used to compare alternatives in design by making rutting estimates for pavements made of different materials. /Author/]]></description><pubDate>Thu, 13 Oct 1977 00:00:00 GMT</pubDate><guid>http://pubsindex.trb.org/view/58745</guid></item></channel></rss>