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Relationships between Erodibility and Properties of Soils.
Publication Date | 2019 |
Personal Author | Briaud, J. L.; Shafii, I.; Chen, H. C.; Medina-Cetina, Z. |
Page Count | 338 |
Abstract | NCHRP Research Report 915: Relationship Between Erodibility and Properties of Soils provides state transportation geotechnical engineers, hydraulic engineers, structural engineers, and other practitioners with a detailed analysis and a searchable Microsoft® Excel spreadsheet, NCHRP-Erosion, that uses statistical techniques to relate geotechnical properties to soil erodibility. Downloadable from the TRB summary web page for this report (search trb.org for “NCHRP Research Report 915”), NCHRP-Erosion is a searchable database that includes compiled erosion data from the literature review and a plethora of erosion tests. It contains equations that may be used to estimate the erosion resistance of soil and determine whether erosion tests are needed. Analysis of the erodibility of geomaterials is important for the study of problems related to soil erosion such as bridge scour, embankment overtopping erosion, and stream stability. Erodibility is a relationship between the soil erosion rate and fluid velocity or hydraulic shear stress. Since different soils have different geotechnical properties, their erosion rates vary. Additionally, existing laboratory and field erosion soil tests yield varied results that make it difficult to achieve consistent and reliable estimates. Under NCHRP Project 24-43, Texas A&M University (TAMU) was asked to develop equations that quantify soil erodibility on the basis of soil properties. Two approaches were used: (1) development of correlations between the elements of the erosion function (critical velocity, critical shear stress, and slope of the erosion function) with basic soil properties (e.g., plasticity index, mean grain size, unit weight, and shear strength) and (2) use of erosion categories to develop best fit models where the erosion function fits in a zone between boundaries to be directly associated with a single category of the erosion function so that correlations with soil properties can be developed. TAMU completed an extensive literature search compiling erosion data from multiple sources worldwide and conducted hundreds of erosion and geotechnical property tests. Following detailed statistical analysis, a searchable Microsoft Excel spreadsheet that relates geotechnical properties to soil erodibility was developed. This spreadsheet, NCHRPErosion, can be downloaded from the TRB summary web page for NCHRP Research Report 915. Through the use of numerical simulations, the researchers also compared soil erosion test methods to inform test method selection. NCHRP Research Report 915 should be helpful for those responsible for geotechnical analysis within state transportation agencies and other practitioners. |
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NTIS Subject Category | |
Corporate Authors | Transportation Research Board, Washington, DC. National Cooperative Highway Research Program. |
Document Type | Technical Report |
NTIS Issue Number | 202006 |
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NCHRP Research Report 948: Getting to the Other Side: Safe Navigation for Pedestrians and Bicyclists at Alternative and Other Intersections and Interchanges
This article includes highlights from a National Cooperative Highway Research Program (NCHRP) research report looking at the safety of pedestrians and bicyclists at alternative intersections and interchanges. The report provides design strategies for the four most common alternative designs: restricted crossing U-turn (RCUT), median U-turn, displaced left turn, and diverging diamond interchange. A quantitative analysis method was built around 20 performance-based design checks/flags highlighting design characteristics that impact safety and quality of service for people walking and biking, regardless of the intersection type. The 20 Design Flag method is applied to all pedestrian and bicyclist movements through an intersection, which are then tallied to the total of yellow and red flags identified. The percentages of flags allow for comparison of proposed designs and can be used in screening designs to move forward.
- Record URL: https://www.trb.org/main/blurbs/182697.aspx
- Find a library where document is available. Order URL: http://worldcat.org/issn/07386826
- Schroeder, Bastian
- Warchol, Shannon
- Alston, Mike
- Publication Date: 2022-1
- Media Type: Digital/other
- Features: Figures; Photos;
- Pagination: pp 3-7
- Issue Number: 337
- Publisher: Transportation Research Board
- ISSN: 0738-6826
Subject/Index Terms
- TRT Terms: Cyclists ; Highway design ; Interchanges and intersections ; Pedestrian safety ; Performance based specifications ; U turns
- Subject Areas: Design; Highways; Pedestrians and Bicyclists; Safety and Human Factors;
Filing Info
- Accession Number: 01838654
- Record Type: Publication
- Files: TRIS, TRB, ATRI
- Created Date: Mar 16 2022 10:19AM
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Please assign a placeholder URL for NCHRP Research Report 915: Relationship Between Erodibility and Properties of Soils.
We need this so that an Excel spreadsheet that will accompany the report can direct readers to the Inquiry Operation Manual for the spreadsheet, which is included in the report.
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Senior Editor Cooperative Research Programs Transportation Research Board National Academies of Sciences, Engineering, and Medicine 500 Fifth Street NW Washington, DC 20001 ; 202-334-2979
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VIEW LARGER COVER
Effective Low-Noise Rumble Strips
Rumble strips are proven safety countermeasures for roadway departure crashes. They produce vibration and noise to alert drivers that they are drifting from the travel lane. Neighboring residents—contiguous to roadways with rumble strips—often complain about the noise generated by these appurtenances. This has prompted a need to simultaneously study noise mitigation and rumble strip design and application.
NCHRP Research Report 1107: Effective Low-Noise Rumble Strips , from TRB's National Cooperative Highway Research Program, proposes a rumble strip design that would minimize exterior noise on the outside of the vehicle yet generate sufficient auditory and vibratory response on the inside of the vehicle to alert the operator of a roadway lane departure.
Supplemental to the report are Appendices A , B , C , D , and E and a presentation .
RESOURCES AT A GLANCE
- Appendix A: Review of Literature and Current Practices
- Appendix B: Test Program Development
- Appendix C: Midwest Sinusoidal Strips Testing
- ↓ Scroll Down for More Resources
- Transportation and Infrastructure — Design
- Transportation and Infrastructure — Pavements
- Transportation and Infrastructure — Safety and Human Factors
Suggested Citation
National Academies of Sciences, Engineering, and Medicine. 2024. Effective Low-Noise Rumble Strips . Washington, DC: The National Academies Press. https://doi.org/10.17226/27861. Import this citation to: Bibtex EndNote Reference Manager
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- Appendix D: Washington State Sinusoidal Strips Testing
- Appendix E: Rumble Strip Design Recommendation Development
- Presentation
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National Cooperative Highway Research Program (NCHRP) (1986) Methods for Identifying Hazardous Highway Elements. Program Report 128. https://onlinepubs.trb.org/Onlinepubs/nchrp/nchrp_syn_128.pdf
has been cited by the following article:
TITLE: A Novel Network Screening Methodology for Rural Low-Volume Roads
KEYWORDS: Network Screening , Low-Volume Roads , Rural Highways , Traffic Safety
JOURNAL NAME: Journal of Transportation Technologies , Vol.13 No.4 , September 8, 2023
ABSTRACT: Low-volume roads (LVRs) are an integral part of the rural transportation network providing access to remote rural areas and facilitating the movement of goods from farms to markets. These roads pose unique challenges for highway agencies including those related to safety management on the highway network. Specifically, traditional network screening methods using crash history can be effective in screening rural highways with higher traffic volumes and more frequent crashes. However, these traditional methods are often ineffective in screening LVR networks due to low traffic volumes and the sporadic nature of crash occurrence. Further, many of the LVRs are owned and operated by local agencies that may lack access to detailed crash, traffic and roadway data and the technical expertise within their staff. Therefore, there is a need for more efficient and practical network screening approaches to facilitate safety management programs on these roads. This study proposes one such approach which utilizes a heuristic scoring scheme in assessing the level of risk/safety for the purpose of network screening. The proposed scheme is developed based on the principles of US Highway Safety Manual (HSM) analysis procedures for rural highways and the fundamentals in safety science. The primary application of the proposed scheme is for ranking sites in network screening applications or for comparing multiple improvement alternatives at a specific site. The proposed approach does not require access to detailed databases, technical expertise, or exact information, making it an invaluable tool for small agencies and local governments (e.g. counties, townships, tribal governments, etc.).
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IMAGES
COMMENTS
Downloadable from the TRB summary web page for this report (search trb.org for "NCHRP Research Report 915"), NCHRP-Erosion is a searchable database that includes compiled erosion data from the literature review and a plethora of erosion tests. It contains equations that may be used to estimate the erosion resistance of soil and determine ...
NCHRP Report 915: Relationship between Erodibility and Properties of Soils —now published—provides state transportation geotechnical engineers, hydraulic engineers, structural engineers and other practitioners with a detailed analysis and a searchable spreadsheet that uses statistical techniques to relate geotechnical properties to soil erodibility.
NCHRP Research Report 915: Relationship Between Erodibility and Properties of Soils pro- vides state transportation geotechnical engineers, hydraulic engineers, structural engineers, and other practitioners with a detailed analysis and a searchable Microsoft® Excel spread- sheet, NCHRP-Erosion, that uses statistical techniques to relate ...
The National Cooperative Highway Research Program (NCHRP) conducts research in problem areas that affect highway planning, design, construction, operation, and maintenance nationwide. ... The NCHRP 2023 Annual Report presents detailed information on NCHRP's achievements in 2023. It also provides a concise list of research published in 2023 and ...
Project Reports. Synthesis Reports. Research Results Digests ... on all projects initiated under the NCHRP from its inception in 1962 through 1988 is included in NCHRP Web Document 7: Special Edition of Summary of Progress through 1988. Information about projects initiated subsequent to 1988 is available below. All NCHRP Research Field 1 ...
NCHRP Research Reports, Syntheses of Practice, Research Results Digests, Legal Research Digests, Web-Only Documents, and WebResources contain the findings of individual research projects managed by TRB's Cooperative Research Programs. Reports: Reports are the main product of the research project and are often written as guidebooks or manuals.
Appendices 1 and 2 of this report contain the spreadsheets for the erosion test results and soil geotechnical properties, respectively, for all samples tested in this project. [Note: Five appendices to NCHRP Research Report 915 are gathered in an Appendices Report that is available on the NCHRP Project 24-43 page on the TRB website (trb.org).]
NCHRP Report 915 is now available. NCHRP 24-44: Guidelines for Managing Geotechnical Risks in Design-Build Projects: Final: NCHRP 24-45: ... NCHRP Research Report 903 Volumes 1 and 2 available. NCHRP 24-47: Revised Clear-Water and Live-Bed Contraction Scour Analysis: Final:
The National Cooperative Highway Research Program (NCHRP) is a national research program carried out through the collaborative efforts of the Federal Highway Administration (FHWA), the National Academy of Sciences, Engineering, and Medicine (NASEM), and the American Association of State Highway and Transportation Officials (AASHTO). Created in ...
32 NCHRP Research Areas 33 The Central Role of NCHRP Staff 36 NCHRP Research in 2021 37 Table 1. Publications of the National Cooperative Highway Research Program, 2021 40 Table 2. Status (as of 12/31/2021) of Projects Active or Pending During 2021 68 Finding Information on the TRB/NCHRP Websites 69 How to Obtain Publications and Other Materials
Research Agency: University of Texas at El Paso: Principal Investigator: Soheil Nazarian, Ph. D., P.E. Effective Date: 7/27/2015: Completion Date: 12/31/2019: Comments: NCHRP Report 933 is now available. Compaction of earth materials for roadway construction is the primary activity to build embankment and to prepare subgrade, subbase, base, and ...
The National Cooperative Highway Research Program (NCHRP) Report 500 series is a collection of guides in which relevant information is assembled into single volumes, each pertaining to emphasis areas, specific types of crashes, or contributing factors. The guides correspond to the emphasis areas outlined in the American Association of State Highway and Transportation Officials (AASHTO ...
January 1, 1992. This Digest outlines the status of all National Cooperative Highway Research Program (NCHRP) research related to highway pavements. Most NCHRP research in this area focuses on design, materials, construction, evaluation, and management of pavements. This information is provided in five tables.
NCHRP Research Report 1087: Guide for Intersection Control Evaluation, from TRB's National Cooperative Highway Research Program, defines intersection form as the physical layout of the intersection and intersection control as the traffic control device used to govern movements for vehicles, pedestrians, and bicyclists. For example, in the case ...
NCHRP . 17-98 [Completed] Guide for Intersection Control Evaluation Project Data: Funds: $400,000: Research Agency: ... The guide has been published as NCHRP Research Report 1087; the research overview report and implementation tools are available as NCHRP Web Only Document 377. To create a link to this page, ...
An NCHRP report released in 2021 is addressing this issue. NCHRP Research Report 948, Guide for Pedestrian and Bicyclist Safety at Alternative and Other Intersections and Interchanges, is a guide for transportation practitioners to improve non-motorized user safety at every intersection through planning, design, and operational treatments. A ...
This article includes highlights from a National Cooperative Highway Research Program (NCHRP) research report looking at the safety of pedestrians and bicyclists at alternative intersections and interchanges. The report provides design strategies for the four most common alternative designs: restricted crossing U-turn (RCUT), median U-turn ...
Hello Russell, Please assign a placeholder URL for NCHRP Research Report 915: Relationship Between Erodibility and Properties of Soils. We need this so that an Excel spreadsheet that will accompany the report can direct readers to the Inquiry Operation Manual for the spreadsheet, which is included in the report. Thanks, ; Janet Janet McNaughton Senior Editor Cooperative Research ...
Published as NCHRP Research Report 982: Many pavement engineers and researchers believe that the current Superpave asphalt binder specifications do not adequately predict the contribution of binder properties to asphalt mixture fatigue performance. However, at present there is not a clear alternative method to measure the fatigue performance of ...
NCHRP Research Report 1107: Effective Low-Noise Rumble Strips, from TRB's National Cooperative Highway Research Program, proposes a rumble strip design that would minimize exterior noise on the outside of the vehicle yet generate sufficient auditory and vibratory response on the inside of the vehicle to alert the operator of a roadway lane ...
National Cooperative Highway Research Program (NCHRP) (1986) Methods for Identifying Hazardous Highway Elements. Program Report 128.
Published as NCHRP Research Report 1078: State highway agencies across the country are upgrading standards, policies, and processes to satisfy the 2016 AASHTO/FHWA Joint Implementation Agreement for MASH. Existing vehicle collision loads used for reviewing bridge deck overhangs are specified in Section 13 of the AASHTO LRFD ...
The updated Phase II research plan should address the manner in which the proposer intends to use the information obtained in Phase I to satisfy the project objective. A face-to-face interim meeting with NCHRP will be scheduled to discuss the interim report. Work on Phase II tasks shall not begin until the updated research plan is approved by ...