Project Abstracts: 2008 to 2009
Transportation Systems and Materials
Development and Evaluation of Methodological Framework for Real-World Vehicle Energy Use and Emissions Estimation at Multiple Temporal and Vehicular Scales
H.C. Frey and N.M. Rouphail;
National Science Foundation (05/08 to 05/11)
Vehicle Fuel Use and Emissions (FU&E) have substantial national energy and environmental implications, but are confounded by intra/inter-vehicle variability and, therefore, require scientific inquiry to develop an improved basis for their characterization and management. The main objectives of this research are to: (1) quantify intra-vehicle variability in FU&E due to inter-driver variability, cold start, ambient conditions, and road grades; (2) develop FU&E models based on multiple levels of vehicle aggregation and multiple temporal scales; and (3) evaluate the interface of these models with transportation models and for use with real-time vehicle detection.
In-Vehicle Energy and Emissions Information System (IVEEIS)
H.C. Frey and N.M. Rouphail;
National Science Foundation (01/03 to 12/08)
The key objectives of this research project are to (1) develop a micro-scale predictor of energy use and emissions that is deployable at the individual vehicle level in real-time; (2) identify, compare, and evaluate alternate energy use and emissions sampling/reporting schemes that are appropriate at the vehicle and network levels; (3) develop and test a prototype In-Vehicle Energy and Emissions Information System (IVEEIS); and (4) formulate and assess the utility of IVEEIS in developing transportation design and control measures aimed at energy and emission management policies.
Procedure for Curve Warning Signing, Delineation, and Advisory Speeds for Horizontal Curves
J.E. Hummer;
North Carolina Department of Transportation (08/08 to 08/10)
The project will develop a consistent study process that NCDOT personnel should follow when deciding upon the right mix of devices to control horizontal curves. After synthesizing the guidance from the literature and cataloging the practices of the NCDOT, we will develop a set of potential new study methods. The research team intends to examine GIS, database management systems, inventories, and widely-available aerial photos. A new study method for deciding on curve devices can have applications in several places in the NCDOT and can be applied in a proactive manner to all curves
Superstreet Benefits and Capacities
J.E. Hummer;
North Carolina Department of Transportation (08/08 to 05/10)
Superstreets are relatively new designs for arterial streets that involve rerouting certain minor street movements. They have the potential to provide lower delay, lower collision rates, and other benefits in places where conventional improvement alternatives are infeasible. This project will investigate the safety and capacity effects of the 15 or so superstreets that have been installed in North Carolina in recent years. The project will also develop a procedure to allow engineers to estimate the level of service provided by a superstreet in the design stages. If project results are positive, superstreets may become standard features of the urban landscape.
Pavement Marking Performance Analysis
J.E. Hummer and W. Rasdorf;
NC Department of Transportation (07/07 to 06/09)
With an investment of $1 million after five years of data collection, the NCDOT requested that NCSU develop a pavement markings research plan in order to analyze relationships between pavement marking retroreflectivity values and variables such as marking color, marking age, pavement surface, and AADT. Understanding retroreflectivity performance over time is important to establishing a pavement marking strategy that maximizes the material's service life and minimizes the replacement of pavement markings that still have sufficient retroreflectivity. Furthermore, this understanding will enable the NCDOT to implement management strategies that achieve the Federal standards for minimum pavement marking retroreflectivity.
Non-Conventional Alternative Intersection Treatments Guide
J.E. Hummer;
Vanasse Hangen Brustlin, Inc. (08/06 to 08/08)
Heavy traffic flows at intersections present challenges to engineers regarding excessive delays and worsening safety performance. Major side effects also include pollution, wasted fuel, increased stress levels, and economic losses. Several innovative intersection designs that divert left turn movements and reduce signal phases have been studied by researchers and implemented by users, including continuous flow intersections, median u-turns, and superstreets. This study sponsored by the FHWA is to develop an informational guide for those designs that includes a design selection procedure, coverage on operational issues, geometric design considerations, pedestrian accommodations, safety estimations, cost assessments, and marketing materials.
Procedure for Curve Warning Signing, Delineation, and Advisory Speeds for Horizontal Curves
North Carolina Department of Transportation;
J. Hummer, W. Rasdorf, and C.V. Zegeer (08/08 to 08/10)
This project will meet the NCDOT’s need for a consistent process in the application of traffic control devices on horizontal curves. It will develop a consistent study process that NCDOT field personnel should follow when deciding upon the right mix of devices. After synthesizing the guidance from the literature and cataloging the practices of the NCDOT, we will develop a set of potential new study methods. The research team intends to utilize GIS, database management systems, inventories, and widely-available aerial photos in this project. A new study method for deciding on curve devices can have applications in several places in the NCDOT. Eventually, a new study method for curve warnings can be applied in a proactive manner to all curves on all roads.
Validation of APA Design Critera for Field Surface Mixtures
N.P. Khosla;
NC Department of Transportation/FHWA (08/04 to 12/09)
Premature rutting of asphalt pavements is a serious concern experienced in recent years due to the increased traffic and wheel loads. Therefore, it is important to estimate the rutting potential of a mixture before construction. Several test methods are in practice to assess the rutting potential of a mixture. Of the different laboratory rut testers, the Asphalt Pavement Analyzer (APA) is the most widely used loaded wheel tester. Using the correlations between the results of APA and shear tests, this research project aims to validate and modify the rut depth criteria developed in the earlier project, by incorporating the test results of field surface mixtures.
Effect of the Use of Higher Percentages of RAP in NCDOT Hot Mix Asphalt
N.P. Khosla;
NCDOT/FHWA (07/07 to 06/09)
The recycling of asphalt pavements has become a very routine procedure throughout the country. The use of higher percentages of RAP in construction would provide initial cost savings. However, a life cycle cost analysis is needed in order to determine whether use of higher percentages of RAP provides an economical advantage for the life cycle. In order to predict life cycle costs, the fatigue life and rut resistance of mixtures containing various amounts of RAP will be calculated from laboratory testing using the Simple Shear Tester (SST). Based on these results, the life cycle economic analysis can be completed and the optimum percentage of RAP can be determined.
Determining HMA Mix Design Methodologies for Predicting Fatigue Rutting Using Tensile Strength Testing
N.P. Khosla;
NC Department of Transportation/FHWA (07/07 to 06/09)
During its lifetime, an asphalt concrete layer is subjected to many distress mechanisms: rutting, fatigue cracking, temperature cracking and moisture induced damage. Moisture damage of asphalt mixes, better known as stripping, is one of the major distresses affecting pavement performance. Since there is no strength criterion prescribed in the design of Superpave mixtures, an optimized value of tensile strength can be used as a good criterion in design of Superpave mixtures. This project aims at developing a mix design methodology using tensile strength testing of various asphalt mixtures as well as the correlations among the tensile strength and performance parameters of mixtures (fatigue and rutting).
An Investigation of the Effect of Ndesign Values on Performance of Superpave Mixtures
N.P. Khosla;
NCDOT/FHWA (08/09 to 08/12)
The ultimate goal of a mix design is to have a mix that performs adequately in the field. The volumetric properties of a mix are very sensitive to the Ndesign values. Therefore, a detailed study is needed to find which compaction level in the mix design process produces an appropriate compaction effort for field conditions. In this regard, a reduction in Ndesign values is needed in the NCDOT mix design criteria. However, this decision will be made on scientific basis and a thorough evaluation of fatigue and rutting evaluation of our materials and mixtures.
Development of a Field Testing System for Asphalt Surface Treatments
Y. Kim;
NCDOT (08/08 to 08/10)
This research will attempt to develop a field asphalt surface treatment (AST) test method based on the findings from AST research projects undertaken at North Carolina State University (NCSU). The benefits of reliable, performance-based in situ test methods for ASTs are enormous and include: (a) evaluation of the likely performance of newly constructed ASTs; (b) identification of practices that lead to poor performance and correction of deficiencies before serious AST performance problems occur; (c) verification of the performance-based design of ASTs, selection of materials, and determination of the best AST construction practices; and (d) improved operational efficiency and performance of the North Carolina AST program.
Hot Mix Asphalt Performance-Related Specifications Based on Viscoelastoplastic Continuum Damage Models
Y.R. Kim and M.N. Guddati;
DTFH61-08-H-00005, Federal Highway Administration (02/08 to 02/12)
Models developed at NCSU over the years provide a unique opportunity to develop a mechanistic Performance-Related Specification (PRS) for hot mix asphalt (HMA) mixtures. This project will focus on development of different analytical and experimental tools that can be used for the development of the HMA-PRS. The HMA-PRS will be hierarchical in nature; that is, a higher level specification uses more complete and accurate test and analysis methods, which requires more sophisticated testing.
Multiscale Modeling of Asphalt Concrete for Fatigue Cracking Evaluation
Y.R. Kim and M.N. Guddati;
Texas A&M Research Foundation/FHWA (02/06 to 11/11)
Work at WRI-TTI-NCSU under previous funding directed by FHWA has developed continuum damage and micromechanics models of fatigue damage in asphalt mixtures/pavements. In the proposed study, these models will be refined and a wide range of materials and conditions will be tested. The primary objective of the proposed research is to understand the fatigue cracking phenomena in asphalt concrete at multiple scales from which material specifications and design methods would be developed.
Comprehensive Performance Evaluation of Polymer Modified Hot Mix Asphalt Mixtures
Y.R. Kim and R.H. Borden;
Korea Kumho Petrochemical Co., Ltd. (10/06 to 10/08)
With the goal of accurate pavement performance evaluation, the PI and his co-workers at NCSU have been developing advanced models for hot-mix asphalt (HMA) mixtures under complex loading conditons. Over the past decade, they have been successful in developing material models that can accurately capture various critical phenomena such as: microcrack induced damage this is critical for fatigue modeling; strain rate-temperature interdependence; and viscoplastic flow that is critical for rutting evaluation The resulting model is termed the viscoelastoplastic continuum damage (VEPCD) model.
Investigation of Highway Asset Inventory and Data Collection Methods
Y. Kim and J.E. Hummer;
North Carolina Department of Transportation (04/08 to 12/08)
The technologies available to collect data on highway assets have advanced rapidly in recent years. The NCDOT and FHWA hosted a national expo in September 2008 to showcase the technologies. The project team helped organize the event, lining up speakers and exhibitors. A major part of the effort was in evaluating the accuracy of the data collected by vans driving test sections of highway. This part of the project team evaluated data pertaining to the roadway surface and the roadside. The experiment showed that vans generally provide good quality data, although the quality varies depending upon the particular variable.
Top-Down Fatigue Cracking of Hot-Mix Asphalt Layers
Y.R. Kim & M.N. Guddati;
NCHRP 1-42A, Subcontract from University of Florida (06/06 to 05/09)
In this research, the viscoelastic continuum damage model implemented in the finite element program (VECD-FEP++) will be used to investigate the top-down fatigue cracking mechanism in hot-mix asphalt pavements. The VECD model and the dynamic modulus from the IDT test will serve as the primary experimental tools. The resulting VECD-FEP++ will be used to simulate the behavior of asphalt pavements with varying loading, environmental, and pavement factors. The results from the simulation will be investigated to develop mechanistic procedures to evaluate the top-down cracking propensity of asphalt pavement as a function of various factors and to predict the top-down cracking performance of asphalt pavement.
Calibration of Rutting Models for HMA Structural and Mix Design
Y.R. Kim and M.N. Guddati;
NCHRP 9-30A, Subcontract from Applied Research Associates, Inc. (11/05 to 10/08)
The objective of this research effort is to recommend revisions to the HMA rut depth prediction model in the mechanistic-empirical pavement design guide and software developed in NCHRP Project 1-37A for consideration by the NCHRP Project 1-40 panel and the AASHTO Joint Task Force on Pavements. The recommended revisions will be based on the calibration and validation of distress models with measured materials properties and performance data from existing field and other full-scale pavement sections that incorporate modified as well as unmodified asphalt binders.
Engineering to Enhance the Resilience of the Built and Natural Environments
R. Leuttich (UNC-CH), M. Overton, G.F. List, R. Seracino, M. Gabr, R. Ranjithan, D. Brill, and J. Baugh;
Department of Homeland Security, Center of Excellence (08/08 to 07/14)
The objective is to investigate innovative and proactive approaches to plan, design and construct CCI components to provide services needed to increase disaster preparedness and resilience of the integrated CCI system, as well as to protect the natural environment. To achieve this goal, five highly interrelated research projects are being proposed. Each project has a project leader and anticipated partners; however, the projects are proposed as complementary pieces contributing products to be used to meet the overarching objective to enhance the resilience of the built and natural environment, a single objective. As such, project leaders will work together to coordinate efforts, align case studies, transfer outcomes, develop scenarios, etc. toward a highly integrated product.
Guidelines on the Use of Auxiliary Through Lanes at Signalized Intersections
N.M. Rouphail and J.E. Hummer;
National Cooperative Highway Research Program 3-98 (through a subcontract to Kittelson and Associates, Inc.)
(03/09 to 02/11)
Auxiliary through lanes—added just prior to an intersection and dropped just after—are a promising way to increase capacity where needed without huge financial or environmental impacts. There are several challenges that must be overcome before such treatments are widespread, however. To meet those challenges, the project team will develop models to predict utilization of auxiliary through lanes by drivers, examine the effects of the lanes on signal timing, develop delay equations, and examine the safety implications of the lanes. The final product will be guidelines for designers considering such installations in the US and elsewhere.
Wireless Electronic Toll and Traffic Management
G.F. List;
Region II University Transportation Research Center (10/05 to present)
This project, originally started at Rensselaer in conjunction with W. Wallace, is focused on advancing the state-of-the-art in technology that allows transportation system managers to observe the performance of their systems. Several wireless, solar-powered E-ZPassSM tag readers have been installed in Rensselaer County east of Albany. The units are being tested for their ability to detect passing traffic and operate under widely varying weather conditions.
Incident Management for Safe, Secure and Productive Transportation Systems
G.F. List;
Region II University Transportation Research Center (10/05 to present)
This project, originally started at Rensselaer in conjunction with W. Wallace, is focused on assessment of incident management systems that are designed for and can be deployed by medium-sized regions comparable to the Albany area. The study works closely with the New York State Thruway Authority and the New York State Police to develop case studies in incident management. This includes review of operating plans and procedures and the how these agencies integrate their operations across multiple regional dispatch and traffic management centers.
North Carolina Statewide Logistics Plan
G.F. List, R. Foyle (ITRE), J.E. Hummer, J. Stone, and B. Williams;
NC Office of State Budget and Management (01/08 to 12/08)
This project, sponsored by the North Carolina State Office of Budget and Management, developed a statewide freight logistics plan for North Carolina. Co-contributors were J. Cameron and H. Canipe (Transtech) and Erik Stomberg (Hatch Mott MacDonald). Most importantly, the plan suggests legislative and regulatory actions to enable North Carolina to be more pro-active in facilitating commercial enterprises, goods movement and economic prosperity. It recommends creation of a freight logistics authority reporting to the governor that has bonding ability and an empowerment to make freight-related infrastructure investment decisions. It also recommends bold investments in the freight aspects of the interstate system, intermodal facilities, ports, and air freight through public-private partnerships.
North Carolina Truck Traffic Profiles
G.F. List, J.R. Stone, and B. Mei;
NC Department of Transportation (07/06 to 12/08)
Better trip profiles are needed to understand the extent to which heavy trucks are using the state's various categories of highways, from rural secondary roads to urban interstates. Pavement and bridge engineers need a better sense of truck weights and axle spacings. Investment decision makers and planners need a better picture of truck volumes, trip distances, and weight distributions by highway class and route category. To help meet these needs, this project aims to create better truck trip flow profiles.
LTPP Computed Parameter: Dynamic Modulus
Y.R. Kim;
FHWA (09/07 to 06/09)
The primary objective of this project is to develop estimates of the dynamic modulus (|E*|) of hot mix asphalt (HMA) layers on LTPP test sections following the models used in the Mechanistic-Empirical Pavement Design Guide (M-E PDG), for storage in the LTPP Pavement Performance Database.
Development of a New Chip Seal Mix Design Method
Y.R. Kim;
NCDOT (07/07 to 06/09)
The objective of the proposed research project is to develop a new chip seal mix design method that can be applied to lightweight aggregate and polymer-modified emulsion as well as to normal aggregate and emulsion, and can be utilized efficiently by field personnel. This design procedure will utilize test methods that are currently under development at North Carolina State University (NCSU) with the objective of measuring important design parameters. The developed design procedure will be verified and calibrated through field experiments.
Performance Based Analysis of Polymer-Modified Emulsions in Asphalt Surface Treatments
Y.R. Kim;
NCDOT (07/06 to 06/09)
This project focuses on the performance evaluation of polymer-modified emulsions in asphalt surface treatments. Limited research and data exist on quantifying the overall performance of polymer-modified surface treatments and associated cost-effectiveness. This project will test the improvement in surface treatment performance resulting from modifying the emulsion with polymers and its cost-effectiveness, in addition to providing baseline performance information about standard surface treatments which will be most valuable in planning maintenance activities. Recommendations will be made on the selection of a proper surface treatment option based on existing pavement distress, traffic volume, and road functionality.
Local Calibration of the MEPDG for Flexible Pavement Design
Y.R. Kim;
NC Department of Transportation (07/06 to 08/15)
The objective of this study is to calibrate the NCHRP 1-37A Mechanistic-Empirical Pavement Design Guide with local data by developing a material database using typical layer materials (HMA and unbound materials) for flexible pavements in North Carolina. The scope of research includes both fatigue cracking and rutting. The primary products of the proposed research are the flexible pavement layer materials performance database and the MEPDG HMA performance model coefficients for typical North Carolina HMA mixtures. An additional product will be an implementation plan with instructions for modifying the MEPDG to incorporate the local coefficients. This plan will shorten the delay between the research and the implementation of the pavement design.
Development of Traffic Data Input Resources for the Mechanistic-Empirical Pavement Design Process
Y.R. Kim, G. List, J. Stone, and W. Rasdorf;
North Carolina Department of Transportation (07/07 to 06/09)
The Mechanistic-Empirical Pavement Design Guide for New and Rehabilitated Pavement Structures uses nationally based data traffic inputs and recommends that state DOTs develop their own site-specific and regional values. NCDOT recently completed an implementation plan for adopting the MEPDG, and two of the critical implementation recommendations addressed new data collection requirements for site-specific truck classification counts, truck axle load spectra, regional average seasonal adjustment factors, and forecasting methods for axle loads, as well as truck class volumes. This research project addresses these NCDOT traffic data and forecasting needs for implementing the MEPDG.
Statewide Logistics Plan for North Carolina
NC Office of State Budget and Management; G.F. List and J.E. Hummer (01/08 to 12/08)
The objective of the project is to develop a statewide logistics plan that will address North Carolina’s long term economic, mobility, and infrastructure needs. The plan will include, but not be limited to, the following components: 1) identification of priority commerce needs, 2) enumeration of transportation infrastructure actions, including multimodal solutions, that will support key industries vital to the State’s long term economic growth, 3) endorsement of the plan based on input from State agencies and the private sector regarding those needs and actions, and 4) a timetable to meet any identified needs.
Blind Pedestrian Access to Complex Intersections, Phase II
N. Rouphail;
National Institutes of Health (Direct Sponsor: Western Michigan University) (06/07 to 05/12)
Pedestrians who are blind make crossing decisions based on information about predictable patterns of vehicular movement. This information is conveyed by traffic sounds and accessible pedestrian signals. At roundabouts, these strategies do not apply because traffic flows freely and often unpredictably. Pedestrians negotiate roundabouts at crosswalks located about one to three car lengths back from the circulating roadway. Splitter islands (medians) either raised like traditional traffic islands or simply painted on the pavement provide a pedestrian refuge midway through street crossings. This research develops and evaluates methods to improve locating, aligning and crossing of blind pedestrians at
roundabouts.
Guidelines for the Use of Auxiliary Through Lanes at Signalized Intersections
Nagui M. Rouphail;
Kittleson and Associates;
National Academy of Sciences, NCHRP 3-98 (03/09 to 02/11)
Auxiliary through lanes (ATLs) are applied at signalized intersections to increase intersection and corridor capacity. For the purpose of this project, ATLs are defined as limited length lanes additional to through lanes upstream and downstream of an intersection (per the Request for Proposals for this project), as illustrated in the FHWA's Signalized Intersections: Informational Guide. This project will produce operational and safety analysis methods and design guidelines to assist transportation professionals in the evaluation and design of ATLs.
Ubiquitous Transportation Network Modeling and Simulation
N. Rouphail; Seoul National University (10/08 to 08/09)
The objectives of this research are to synthesize the state of the art in implementing u-T communication protocols between vehicles (V2V) for traffic operations applications, and to define functional requirements for implementing the u-T communications in a micro simulation environment. The project will also develop and implement the methodology to model network impact of the u-T communications system on the performance of uninterrupted facilities, primarily freeways or expressways. Key performance parameters will investigate the effect on operational measures (compared to a baseline condition) the impact of V2V technology market penetration, network congestion and network connectivity, using a case study application.
National Cooperative Highway Research Program 3-98
N.M. Rouphail and J.E. Hummer; Kittelson and Associates, Inc. (subcontract) (03/09 to 02/11)
Auxiliary through lanes—added just prior to an intersection and dropped just after—are a promising way to increase capacity where needed without huge financial or environmental impacts. There are several challenges that must be overcome before such treatments are widespread, however. To meet those challenges, the project team will develop models to predict utilization of auxiliary through lanes by drivers, examine the effects of the lanes on signal timing, develop delay equations, and examine the safety implications of the lanes. The final product will be guidelines for designers considering such installations in the US and elsewhere.
Regional Development, Population Trend and Technology Change Impacts on Future Air Pollution Emissions
N.M. Rouphail; U.S. Environmental Protection Agency STAR grant via University of North Carolina at Chapel Hill, and Center for Transportation and the Environment (11/04 to 11/08)
The research tests the hypothesis that smart-growth development patterns can significantly influence the quantity and location of direct and indirect emissions from mobile sources. The patterns of interest include the type of development and its location. We will develop a general method for exploring the leverage that smart-growth development patterns have on the spatial pattern and quantity of emissions from mobile sources. We will explore scenarios and chart the envelope of the effectiveness of smart growth as a means for reducing emissions. We will determine whether substantial emissions reductions are feasible with forecasts of the market penetration of smart growth.
Understanding the Contributions of Operations, Technology, and Design to Meeting Highway Capacity Needs
N. Rouphail and B. Williams;
Strategic Highway Research Program-C05 Project;
Transportation Research Board, National Research Council
Modeling component – NCSU/ITRE;
Direct Sponsor: Kittleson and Associates (01/08 to 01/10)
This research quantifies the capacity benefits of operations, design, and technology improvements at the network level. This will provide transportation planners with information and tools to analyze operational improvements and develop guidelines for sustained service rates. The methods will include integration of traffic and performance data from multiple sources and applications of new assessment methods to identify packages of strategies that can substitute for capacity additions. These will combine technological, operational and design approaches that will be validated with independent data. Guidance at the network level for planners and operational managers on how these approaches could be cost-effective will emerge.
Crossing Solutions at Roundabouts and Channelized Turn Lanes for Pedestrians with Visions Disabilities
Ron Hughes (ITRE) and Nagui Rouphail;
UNC-CH, NCHRP 3-78 (01/00 to 12/09)
The objective of this research is to produce recommendations for geometric designs, traffic control devices, and other treatments that enable pedestrians who are visually impaired to cross roundabouts and channelized turn lanes (CTL's) independently and safely. These recommendations should be suitable for inclusion in transportation-industry practice and policies, including the AASHTO Policy on Geometric Design of Highways and Streets and the FHWA Manual on Uniform Traffic Control Devices. Consideration should be given to the impact of the recommendations on all users of roundabout intersections, including occupants of passenger car and trucks, pedestrians (including pedestrians with vision impairments), and bicycles.
Effect of Gradation on Predicted Performance of Aggregate Base Course
T.M. Evans and A.A. Tayebali; North Carolina Department of Transportation (01/08 to 06/09)
The primary objectives of this research are to evaluate the effect of aggregate gradation on the mechanical properties of the ABC materials; and to develop numerical model(s) based on the discrete element method (DEM) to predict mechanical properties with changes in gradation. The DEM models will also provide insight into the underlying micromechanics that may contribute to variations in material performance as a function of ABC gradation. It is anticipated that this research study will result in performance-related criteria that can be incorporated into the NCDOT Standard Specifications that are used for acceptance of ABC material for pavement structure.
Assessing Operational, Pricing and Intelligent Transportation System Strategies for the I-40 Corridor using DYNSMART-p
B. Williams and N.M. Rouphail;
NC Department of Transportation (08/08 to 08/10)
The Raleigh Durham area in NC experienced tremendous growth in both population (50%) and travel (56%) in the period 1995-05. The I-40 corridor, which encompasses I-40, I-85, I-440, I-540, NC147, and US-70 is already under great strain. This project proposes to deliver a calibrated DYNASMART-P model of the Triangle region that will provide performance assessment capability and can be adapted for use throughout the state. It is envisioned as the first step in a five-year program to bring DYNASMART-P capability to statewide modeling of NC’s strategic highway corridors, evacuation modeling of the state’s entire coastal region, and detailed program support modeling for each of the state’s metropolitan areas and regions.
EPA Truck Anti-Idling Demonstration Project
A. Tazewell (NC Solar Center), H.C. Frey, and J.R. Stone;
US Environmental Protection Agency
(02/06 to 08/08)
The objective is to assess potential environmental benefits of heavy-duty diesel freight truck idle reduction technologies installed on trucks in NC. A key goal is to quantify actual grams per gallons emissions with a portable gas analyzer and compare this data with data extrapolated from an on-board data logger and fuel use with and without idle reduction technologies.
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