Project Number Project Title Stage Comments
NCHRP 25-02Predicting Stop-and-Go Traffic Noise LevelsCompleted
NCHRP 25-03Guidelines for the Development of Wetland Replacement AreasCompleted
NCHRP 25-04Determining Economic Impacts on Adjacent Businesses Due to Restricting Left TurnsCompleted
NCHRP 25-05Remote Sensing and Other Technologies for the Identification and Classification of WetlandsCompleted
NCHRP 25-06Intersection Air Quality ModelingCompleted
NCHRP 25-07Improving Transportation Data for Mobile Source Emissions EstimatesCompleted
NCHRP 25-08Impact of Highway Capacity Improvements on Air Quality and Energy ConsumptionCompleted
NCHRP 25-09Environmental Impact of Construction and Repair Materials on Surface and Ground WatersCompleted
NCHRP 25-09(01)Environmental Impact of Construction and Repair Materials on Surface and Ground Waters -- Outreach and TrainingCompleted
NCHRP 25-10Estimating the Indirect Effects of Proposed Transportation ProjectsCompleted
NCHRP 25-10(2)Desk Reference for Estimating the Indirect Effects of Proposed Transportation ProjectsCompleted
NCHRP 25-11Development of a Modal-Emissions ModelCompleted
NCHRP 25-12Wet Detention Pond Design for Highway Runoff Pollution ControlCompletedReport not published.
NCHRP 25-13 and 25-13(2)Assessments of Impacts of Bridge Deck Runoff Contaminants on Receiving WatersCompleted
NCHRP 25-14Heavy-Duty Vehicle EmissionsCompleted
NCHRP 25-15Short-Term Monitoring for Compliance with Air Quality StandardsFinalCompleted and published as NCHRP Report 479
NCHRP 25-16Guidance for Selecting Compensatory Wetland Mitigation OptionsCompleted
NCHRP 25-17Transportation Effects of the 1997 Changes to the National Ambient Air Quality Standards FinalCompleted --- Agency report available on request
NCHRP 25-18Particulate-Matter (PM2.5 and PM10) Apportionment for On-Road Mobile SourcesFinal
NCHRP 25-19Evaluation of Methods, Tools, and Techniques to Assess the Social and Economic Effects of Transportation ProjectsCompleted
NCHRP 25-20Management of Runoff from Surface Transportation Facilities--Synthesis and Research PlanCompleted
NCHRP 25-20(01)Evaluation of Best Management Practices for Highway Runoff ControlCompleted
NCHRP 25-20(02)Identification of Research Needs Related to Highway Runoff ManagementCompleted
NCHRP 25-21Predicting Short-Term and Long-Term Air Quality Effects of Traffic-Flow Improvement ProjectsFinal
NCHRP 25-22Technologies to Improve Consideration of Environmental Concerns in Transportation DecisionsCompletedReport available as CRP-CD-14
NCHRP 25-22(02)Technologies to Improve Consideration of Environmental Concerns in Transportation DecisionsFinal
NCHRP 25-23Environmental Information Management and Decision Support System for TransportationCompleted
NCHRP 25-23(2)Software for an Environmental Information Management and Decision Support SystemCompleted
NCHRP 25-24Monitoring, Analyzing, and Reporting on the Environmental Streamlining Pilot ProjectsFinal
NCHRP 25-25Research for the AASHTO Committee on Environment and SustainabilityFinal
NCHRP 25-25/Task 001Synthesis on Data Needs for EA and EIS DocumentationCompleted
NCHRP 25-25/Task 002Transportation Impacts and 'Smart Growth' InitiativesCompleted
NCHRP 25-25/Task 003Assessment and Mitigation Strategies for Land Development Impacts of Transportation ImprovementsCompleted
NCHRP 25-25/Task 004Environmental Stewardship Practices, Policies, and Procedures for Road Construction and Maintenance Completed
NCHRP 25-25/Task 005Assessing the Current State of the NEPA Environmental Review ProcessCompleted
NCHRP 25-25/Task 006Preparing State DOTs for Implementation of the 8-hour Ozone and PM2.5 StandardsCompleted
NCHRP 25-25/Task 007Evaluation of Mobile Models: MOBILE 6.1, MOBILE 6.2 and MOBILE6/CNGCompleted
NCHRP 25-25/Task 008Developing Performance Data Collection Protocol for Stream RestorationCompleted
NCHRP 25-25/Task 009Use of Existing Data in Decision MakingCompletedCancelled
NCHRP 25-25/Task 010Alternative Mitigation Strategies/Early Mitigation: Streamlining and Achieving Net Benefits for the Natural EnvironmentCompleted
NCHRP 25-25/Task 011Secondary/Indirect and Cumulative Effects AnalysisCompleted
NCHRP 25-25/Task 012Design-Build Environmental Compliance Process and Level of Detail RequiredCompleted
NCHRP 25-25/Task 013Agency Use and Approach to FHWA Approved Programmatic AgreementsCompleted
NCHRP 25-25/Task 014A Summary of Existing Research on Dam Removal ProjectsCompleted
NCHRP 25-25/Task 015Historic BridgesCompleted
NCHRP 25-25/Task 016State Transportation Agency Strategies to Address NPDES Phase II RequirementsCompleted
NCHRP 25-25/Task 017Assessment of Greenhouse Gas Analysis Techniques for Transportation ProjectsCompleted
NCHRP 25-25/Task 018Recommended Approaches to Communicating Air Toxics Issues and Transportation Project-Related Analyses in NEPA DocumentsCompleted
NCHRP 25-25/Task 019Historic Bridge Rehabilitation / Replacement Decision MakingCompleted
NCHRP 25-25/Task 020The Role of State DOTs in Support of Transit Oriented Development (TOD)Completed
NCHRP 25-25/Task 021Assessment of Geophysical Remote Sensing Opportunities at State Departments of Transportation for Incorporation into Archaeological InvestigationsCompleted
NCHRP 25-25/Task 022Land Use Forecasting for Indirect Impacts AnalysisCompleted
NCHRP 25-25/Task 023Environmental performance measurements related to transportation project planning, design, construction, maintenance and operationsCompleted
NCHRP 25-25/Task 024Climate Change and U.S. TransportationCompleted
NCHRP 25-25/Task 025Modification and Amendment of Environmental Permits on Design-Build ProjectsCompleted
NCHRP 25-25/Task 026Integration of Charrette Processes into Project PlanningFinalCancelled
NCHRP 25-25/Task 027Project Management and NEPACompletedCompleted
NCHRP 25-25/Task 028Reevaluations of NEPA documentsCompleted
NCHRP 25-25/Task 029Best Practices Library from the Environmental Stewardship Practices in Construction and Maintenance CompendiumCompleted
NCHRP 25-25/Task 030Section 404 Permitting and Roadside Ditches as Jurisdictional WatersCompletedCancelled
NCHRP 25-25/Task 031Cost Effective Tools for Achieving PM 2.5 Transportation Air Quality ConformityCompletedCancelled
NCHRP 25-25/Task 032Linking Environmental Resource and Transportation Planning The Current State of PracticeFinalThis project is completed and results are available at the links below.
NCHRP 25-25/Task 033National Register of Historic Places EligibilityCompleted
NCHRP 25-25/Task 034Streamlined Carbon Monoxide Hot Spot Screening / Modeling ToolCompletedCancelled
NCHRP 25-25/Task 035Water Quality Analyses for NEPA Documents: Selecting Appropriate MethodologiesCompletedCompleted
NCHRP 25-25/Task 036Recurring Community ImpactsFinalThe final report has been submitted to AASHTO
NCHRP 25-25/Task 037Effective Organizational Structures and Management Practices for Achieving Environmental Stewardship in Transportation AgenciesFinalFinal Report sent to AASHTO.
NCHRP 25-25/Task 038Guide to Use of Tier I Environmental Impact Statements for Transportation ProjectsCompletedThe draft final report has been accepted and distributed to AASHTO.
NCHRP 25-25/Task 039Improving Project Environmental Cost EstimatesFinalThe project is completed and the final report has been submitted to AASHTO.
NCHRP 25-25/Task 040New Noise Barrier Products & Noise Barrier Approval Research & GuidelinesCompletedCompleted.
NCHRP 25-25/Task 041Implementation of Community & Cultural Resource CommitmentsFinalThis project is completed and the final report has been submitted to AASHTO.
NCHRP 25-25/Task 042Determine alternative calculations for fine particulate emission factors other than AP-42 applicable to calculate re-entrained dust on transportation projectsFinalThe project has been completed and the final report submitted to AASHTO
NCHRP 25-25/Task 043Guidance on legal sufficiency criteria for adequate cumulative and secondary impacts analysis in EIS documentsFinalThe project has been completed and the final report submitted to AASHTO
NCHRP 25-25/Task 044Development and Implementation of a Transportation and Climate Change ClearinghouseFinalThe clearinhouse has been completed and transferred to the U.S. DOT.
NCHRP 25-25/Task 045Transportation Program Responses to Greenhouse Gas (GHG) Reduction Initiatives and Energy Reduction ProgramsFinalThe project has been completed and the final report submitted to AASHTO
NCHRP 25-25/Task 046Compendium of Best Practices for Environmental Compliance and Stewardship at Transportation Maintenance FacilitiesFinalThe project has been completed and the final report submitted to AASHTO
NCHRP 25-25/Task 047Compendium of Best Practices for Incorporating Environmental Commitments into Transportation Project Construction Contract DocumentsFinalThe project has been completed and the final report submitted to AASHTO.
NCHRP 25-25/Task 048Compendium of Environmental Fieldwork Technologies FinalThe project has been completed and the final report submitted to AASHTO
NCHRP 25-25/Task 049Effective Practices for Considering Historic Preservation in Transportation Planning and Early Project DevelopmentFinalCompleted and final report sent to AASHTO SCOE.
NCHRP 25-25/Task 050Finding the Carrot Instead of the Stick - Incentive-based Approaches for Environmental Compliance FinalThe project has been completed and the final report submitted to AASHTO
NCHRP 25-25/Task 051Asset Management of Environmental Mitigation FeaturesFinalThe project has been completed and the final report submitted to AASHTO.
NCHRP 25-25/Task 052Informational Requirements for Jurisdictional Determinations to be Issued by the Army Corps of Engineers (Corps) Under the Clean Water Act (CWA) FinalThe project has been completed and the final report submitted to AASHTO.
NCHRP 25-25/Task 053Stormwater Treatment with Vegetated BuffersFinalThe project has been completed and the final report submitted to AASHTO.
NCHRP 25-25/Task 054Evaluate Colorado's Area-wide Cumulative Effects Assessment (ACEA) Methodology as a Mechanism for Cumulative Impacts Analysis of Regional Transportation PlansFinalThe project has been completed and the final report submitted to AASHTO.
NCHRP 25-25/Task 055Design, Organize and Implement a Training Program for Mainstreaming Environmental Stewardship and Enhancement Activities into Planning and Project DevelopmentFinalThe project has been completed and the final report submitted to AASHTO.
NCHRP 25-25/Task 056Cost and Benefit of Transportation Specific MS4 and Construction PermittingFinalFinal report submitted to AASHTO SCOE
NCHRP 25-25/Task 057Integrated State and Local Government Policy Approaches to Transportation and ClimateFinalCompleted - Final Report sent to AASHTO
NCHRP 25-25/Task 058Methods to Address Greenhouse Gas Emissions from Transportation Construction/Maintenance/Operations ActivitiesFinalCompleted and submitted to AASHTO SCOE
NCHRP 25-25/Task 059Evaluate the Interactions between Transportation-Related Particulate Matter, Ozone, Air Toxics, Climate Change, and Other Air Pollutant Control StrategiesFinalFinal Report submitted to AASHTO SCOE.
NCHRP 25-25/Task 060Increased Use of Environmentally Preferable, Non-Toxic Products to Reduce Costs, Liabilities, and Pollution at DOT Offices, Maintenance Facilities and Rest StopsFinalFinal Report submitted to AASHTO.
NCHRP 25-25/Task 061Best Practices for Establishing and Maintaining Statewide Cultural Resource Databases at State DOTsFinalFinal Report submitted to AASHTO SCOE
NCHRP 25-25/Task 062Improving the Effectiveness of Outreach to Traditional and Non-Traditional Groups by Integrating the Expertise of Existing and Emerging Citizen Coalitions into Transportation Analysis and Decision MakingFinalFinal Report submitted to AASHTO SCOE
NCHRP 25-25/Task 063Transportation Corridor Environmental Management FrameworkFinalThe project has been completed and the final report submitted to AASHTO
NCHRP 25-25/Task 064Feasibility Study of Using Solar or Wind Power for Transportation InfrastructureFinalCompleted. Final Report Submitted to AASHTO SCOE.
NCHRP 25-25/Task 065Synthesis of Greenhouse Gas Emission Inventory Methodologies for State Transportation DepartmentsFinalCompleted. Final report submitted to AASHTO.
NCHRP 25-25/Task 066Best Practices and Lessons Learned on the Preservation and Rehabilitation of Historic BridgesCompletedFinal report delivered to AASHTO SCOE
NCHRP 25-25/Task 067Optimizing Conservation and Improving Mitigation Cost/BenefitFinalCompleted. Final Report submitted to AASHTO SCOE
NCHRP 25-25/Task 068Implementing Measures to Reduce Highway Impacts on Habitat FragmentationFinalCompleted and Final report submmited to AASHTO SCOE
NCHRP 25-25/Task 069Identification of Tools and Techniques to Define Community Context as Part of the Transportation Project Planning and Development ProcessCompletedFinal Report submitted to AASHTO SCOE
NCHRP 25-25/Task 070Assessment of Quantitative Mobile Source Air Toxics in Environmental DocumentsCompletedCompleted and report submitted to AASHTO SCOE
NCHRP 25-25/Task 071Templates for Project-Level Analyses Using MOVES and AERMODCompletedCompleted and report submitted to AASHTO SCOE
NCHRP 25-25/Task 072Current Practices to Address Construction Vibration and Potential Effects to Historic Buildings Adjacent to Transportation ProjectsCompletedCompleted and report submitted to AASHTO SCOE
NCHRP 25-25/Task 073Improved Environmental Performance of Highway MaintenanceCompletedCompleted and final report submitted to AASHTO SCOE
NCHRP 25-25/Task 074Meeting the New EPA Effluent Limitations Guideline for Construction Site Discharge Turbidity: Effectiveness of Different Turbidity Control Systems and Monitoring MethodsCompletedCompleted and submitted to AASHTO SCOE
NCHRP 25-25/Task 075Nationwide Evaluation of Transfer of Compensatory Wetland Creation Sites for Transportation Projects to Private Conservation Organizations or Government Conservation AgenciesCompletedCompleted. Report Submitted to AASHTO SCOE
NCHRP 25-25/Task 076Synthesis of Climate Change and Transportation Research Efforts at State DOTs, State Universities, and the Federal LevelFinalCompleted. Final Report submitted to AASHTO SCOE.
NCHRP 25-25/Task 077Strategic Options of Inventorying and Updating Environmental Guidance and LinksCompletedCompleted and final report submitted to AASHTO SCOE
NCHRP 25-25/Task 078Programmatic Agreements for Project-Level AirQuality Analyses Using MOVES, CAL3QHC/R and AERMODCompletedCompleted--final deliverables available for AASHTO use
NCHRP 25-25/Task 079Successful Practices for Effective Tribal ConsultationCompletedCompleted and report submitted to AASHTO SCOE
NCHRP 25-25/Task 080Potential Use of Social Media Impact in the NEPA ProcessCompletedReport completed and submitted to AASHTO SCOE
NCHRP 25-25/Task 081Federal Compliance for Projects Utilizing Alternative Funding StrategiesCompletedCompleted and report submitted to AASHTO SCOE
NCHRP 25-25/Task 082Permeable Shoulders with Stone ReservoirsCompletedCompleted and report submitted to AASHTO SCOE
NCHRP 25-25/Task 083Current Practice of Post- Construction Structural Stormwater ControlCompletedCompleted and final report submitted to AASHTO SCOE
NCHRP 25-25/Task 084Development of Construction Guidelines for Wildlife Fencing and Associated Escape and Lateral Access Control MeasuresCompletedFinal deliverable available for AASHTO use
NCHRP 25-25/Task 085Nutrient (Nitrogen/Phosphorous) Management and Source ControlCompletedFinal deliverables available for AASHTO use
NCHRP 25-25/Task 086Toxicological Effects of Chloride Based Deicers in the Natural EnvironmentCompletedCompleted
NCHRP 25-25/Task 087Coordination of Section 106 and Long Range Transportation PlanningCompletedFinal deliverables available for AASHTO use
NCHRP 25-25/Task 088Giving Away the Bridge: A National Synthesis of on Transferring Ownership of Historic BridgesCompletedFinal deliverables available for AASHTO use
NCHRP 25-25/Task 089Establishing Representative Background Concentrations for Quantitative Hot-spot Analyses for Particulate MatterCompletedFinal deliverables available for AASHTO use
NCHRP 25-25/Task 090Application of Geographic Information Systems (GIS) for Historic PropertiesFinal
NCHRP 25-25/Task 091Synthesis of Transportation Exclusions to Section 106 ReviewCompletedFinal deliverables available for AASHTO use
NCHRP 25-25/Task 092Transferability of Post-Construction Stormwater Quality BMP Effectiveness StudiesCompletedCompleted--Final deliverables available for AASHTO use
NCHRP 25-25/Task 093Long-Term Construction and Maintenance Cost Comparison for Road Stream Crossing Hydraulic Design vs. Bankfull Width DesignFinal
NCHRP 25-25/Task 094Integrating Climate Change and Extreme Weather Into Transportation Asset Management PlansFinal
NCHRP 25-25/Task 095SCOE Strategic Plan and Research Plan for SCOE Areas of InterestCompletedCompleted--Final deliverable available for AASHTO use
NCHRP 25-25/Task 096Quick Reference Guide for Traffic Modelers for Generating Traffic and Activity Data for Project-Level Air Quality AnalysesFinal
NCHRP 25-25/Task 097Historic Roads: A Synthesis of Identification and Evaluation Practices Final
NCHRP 25-25/Task 098Practical Guide for Developing Effective Scopes of Work for the Geophysical Investigation of Cemeteries Final
NCHRP 25-25/Task 099Lessons Learned from State DOT NEPA AssumptionFinal
NCHRP 25-25/Task 100Compilation of Existing Data on Northern Long-Eared and Other Cave-Dwelling Bat Habitat and the Roadside EnvironmentFinalProject cancelled
NCHRP 25-25/Task 101Stormwater Monitoring Program Goals, Objectives and Protocols for State Departments of TransportationFinal
NCHRP 25-25/Task 102Artificial Bat Roost Mitigation Designs and Standardized Monitoring CriteriaFinal
NCHRP 25-25/Task 103Administration of Categorical Exclusions by State Departments of Transportation under NEPAFinal
NCHRP 25-25/Task 104Streamlining Carbon Monoxide Project-Level Air Quality Analyses with Programmatic AgreementsFinal
NCHRP 25-25/Task 105A Guidebook for Communications between Transportation and Public Health CommunitiesFinal
NCHRP 25-25/Task 106Highway Noise and Historic Properties: A National Review of Effects and Mitigation PracticesFinal
NCHRP 25-25/Task 107Section 106 Delegation Programmatic Agreements: Review and Best PracticesFinal
NCHRP 25-25/Task 108Creating Lookup Tables to Streamline the Determination of Emission Reductions for CMAQ Projects Final
NCHRP 25-25/Task 109Successful Practices for Environmental Commitments in Public/Private Partnerships (P-3) and Design-Build (D-B) ContractsFinal
NCHRP 25-25/Task 110Review of Historic Property Identification Surveys and Strategies for Managing Post-World War II Housing in Transportation ProjectsFinal
NCHRP 25-25/Task 111Environmental Management System Perspectives For State DOTsFinal
NCHRP 25-25/Task 112Enhancing the International Stormwater BMP Database to Serve as a Highway Specific BMP DatabaseFinalCancelled.
NCHRP 25-25/Task 113Road Passages and Barriers for Small Terrestrial Wildlife: Summary and Repository of Design ExamplesFinal
NCHRP 25-25/Task 114Integrating Tribal Expertise into Processes to Identify, Evaluate, and Record Cultural ResourcesFinal
NCHRP 25-25/Task 115Estimates of Emissions Reductions from Future Fleet Changes for Use in Air Quality ModelsFinal
NCHRP 25-25/Task 116Potential Section 106 Exempted Categories or Program Comments for Federal Highway Administration Projects: National Streamlining OpportunitiesFinal
NCHRP 25-25/Task 117Valuing Wildlife Crossing Enhancements for Mitigation CreditsFinal
NCHRP 25-25/Task 118Context-Sensitive Design Options for Workhorse Bridges in Rural Historic DistrictsFinal
NCHRP 25-25/Task 119Enhancing the International Stormwater BMP Database to Serve as a Highway Specific BMP DatabaseFinal
NCHRP 25-25/Task 120Use of the State Department of Transportation Portal to the International Stormwater BMP DatabaseFinal
NCHRP 25-25BResearch for the AASHTO Standing Committee on the EnvironmentActive
NCHRP 25-27Evaluation of the Use and Effectiveness of Wildlife CrossingsCompleted
NCHRP 25-28Predicting and Mitigating Hydroacoustic Impacts on Fish from Pile InstallationCompletedThe final report has been published as Research Results Digest 363.
NCHRP 25-29Developing Design and Management Guidelines for Historic Road CorridorsCompleted
NCHRP 25-29AGuidelines for Design and Management of Historic RoadsCompletedThe project final report is available as NCHRP Web-Only Document 189.
NCHRP 25-30Temporary Bridging to Avoid or Minimize Impacts to Waters and Wetlands During Highway ConstructionFinalThe results of this study have been published in NCHRP Research Results Digest 330 .
NCHRP 25-31Guidelines for Evaluating and Selecting Modifications to Existing Roadway Drainage Infrastructure to Improve Water Quality in Ultra-Urban AreasCompleted
NCHRP 25-32Measuring and Removing Dissolved Metals from Storm Water in Highly Urbanized AreasCompletedResearch completed; to be published as NCHRP report 767
NCHRP 25-33Evaluating Methodologies for Visual Impact AssessmentsFinalFinal report published as Report 741
NCHRP 25-34Supplemental Guidance on the Application of FHWA's Traffic Noise Model (TNM)Final
NCHRP 25-35Guidebook for Designing and Managing Rights-of-Way for Carbon Sequestration and Biomass Generation CompletedCompleted. Published as NCHRP Report 804 with CRP-CD-165
NCHRP 25-36Impacts of Land Use Strategies on Travel Behavior in Small Communities and Rural AreasFinalAgency's Handbook is available as NCHRP Web-only Document 211
NCHRP 25-37A Watershed Approach to Mitigating Stormwater ImpactsFinal
NCHRP 25-38Input Guidelines for Motor Vehicle Emissions Simulator ModelFinalFinal deliverables are available as individual volumes of NCHRP Web-only Document 210
NCHRP 25-39Environmental Performance Measures for State Departments of TransportationFinal
NCHRP 25-40Long-Term Performance and Life-Cycle Costs of Stormwater Best Management PracticesCompletedFinal report published as NCHRP Report 792.
NCHRP 25-41Guidance for Achieving Volume Reduction of Highway Runoff in Urban AreasCompleted
NCHRP 25-42Bridge Stormwater Runoff Analysis and Treatment OptionsFinal
NCHRP 25-43Navigating Multi-Agency NEPA Processes to Advance Multimodal Transportation ProjectsFinal
NCHRP 25-44Field Evaluation of Reflected Noise from a Single Noise BarrierFinal
NCHRP 25-45Mapping Heavy Vehicle Noise Source Heights for Highway Noise AnalysisCompleted
NCHRP 25-46Deploying Clean Truck Freight StrategiesFinalPublished as NCHRP Report 862
NCHRP 25-47How to Measure and Communicate the Value of Access ManagementCompletedPublication pending as NCHRP Research Report 1032 and NCHRP Web Only Document 339.
NCHRP 25-48Combined Interface for Project Level Air Quality Analysis Final
NCHRP 25-49Development of a Highway Construction Noise Prediction ModelFinalComplete. Final report available on project webpage and FHWA website.
NCHRP 25-50Prioritization Procedure for Proposed Road-Rail Grade Separation Projects along Specific Rail CorridorsFinalPublished as NCHRP Report 901
NCHRP 25-51Limitations of the Infiltration Approach to Stormwater Management in the Highway EnvironmentFinalPublished as NCHRP Research Report 922
NCHRP 25-52Meteorological Effects on Roadway NoiseFinal
NCHRP 25-53Approaches for Determining and Complying with TMDL Requirements Related to Roadway Stormwater Runoff Final
NCHRP 25-54Field Testing of BMPs Using Granulated Ferric Oxide Media to Remove Dissolved Metals in Roadway Stormwater RunoffFinal
NCHRP 25-55Assessment of Regulatory Air Pollution Dispersion Models to Quantify the Impacts of Transportation Sector EmissionsCompletedFinal deliverables pending.
NCHRP 25-56Methods for State DOTs to Reduce Greenhouse Gas Emissions from the Transportation SectorFinal
NCHRP 25-57Breaking Barriers: Alternative Approaches to Avoiding and Reducing Highway Traffic Noise ImpactsFinal
NCHRP 25-58Commercial Properties from 1945 to 1980: Guidance for State DOTs and Their Partners for Historic Context Development, Identification, and EvaluationFinalProject cancelled.
NCHRP 25-59Pollinator Habitat Conservation Along RoadwaysCompletedFinal deliverables pending.
NCHRP 25-60Watershed Approach to Mitigating Hydrologic Impacts of Transportation ProjectsFinal
NCHRP 25-61Development of On-Bridge Stormwater Treatment PracticesActive
NCHRP 25-62Improving the Efficiency and Consistency of Section 106 Compliance for State DOTs: Strategies for Project-Level Programmatic Agreements and Postwar Commercial Properties Active
NCHRP 25-63Handbook on Deterring and Excluding Bats from Transportation StructuresActive
NCHRP 25-64Considering Greenhouse Gas Emissions and Climate Change in Environmental Reviews: Resources for State DOTsActive