LOW-COST REMOTE WEATHER INFORMATION SYSTEM PHASE I AND PHASE 2

Remote Weather Information Systems (RWIS) are an important part of deciding maintenance activities and scheduling. However, the cost of RWIS limits the number of systems that can be deployed. Because of the lack of power and the high power budget of commonly used systems, some locations are not suitable for RWIS even though the information would be of great value. This project focuses on the development of a low-cost, low-power RWIS that is suitable for remote locations and allows for a higher density of RWIS. The system produced under this study uses less than 10 watts of power and costs less than $10,000 for the basic system. The system has performed well in Fairbanks, Alaska, over two winters. In addition, the system has been fully integrated into the Alaska Department of Transportation and Public Facilities RWIS network.WeatherCloud Inc

Laboratory Procedure for Measuring the Effectiveness of Dust Control Palliatives

Creation of fugitive dust on unpaved roads results in the loss of up to 25 mm (one inch) of surface aggregate annually (FHWA, 1998). On these roads, shearing forces created by vehicles dislodge the fine aggregate fraction (silt and clay) that binds the coarse aggregate. Turbulent airflow created by vehicles loft these fine particles in plumes of fugitive dust that impact health, safety, and quality of life. The loss of these particles results in raveling of the road surface, culminating in large annual losses of surface aggregate. Chemical dust control (palliatives) is an attractive option. However, there are currently no accepted field or laboratory performance testing procedures for chemical road dust palliatives. The lack of a method to predict palliative performance forces engineers and road managers into a trial-and-error methodology or reliance on personal judgment and supplier claims to determine what will work best on their unpaved road or runway surfaces. The overall objective of this research was to finalize the development of a laboratory test procedure for evaluating different dust control formulations and application rates required to effectively control the airborne suspension of dust particles in the size range (aerodynamic diameter) of 10 μm or less.Pacific Northwest Transportation Consortiu

Guidelines for the Use of Synthetic Fluid Dust Control Palliatives on Unpaved Roads

The amount of small soil particles, dust, lost from typical unpaved roads to fugitive dust is staggering. A 1 km stretch of unpaved road can contribute over 2400 kg of dust to the atmosphere (4.2 ton/mile) in a typical 3-month summer season. Road managers typically manage dust from unpaved roads with various dust-control palliatives, which are effective for up to 1 year. Synthetic fluids are a relatively new category of dust-control palliatives. Unlike the more commonly used dust-control palliatives, such as salts, engineering guidelines do not exist for the application and maintenance of synthetic fluids on unpaved roads. To fill this void, we present through this document guidelines for road design and maintenance, palliative selection, application, and care of synthetic fluid-treated roadways.Midwest Industrial Supply United States Department of TransportationReport Documentation Page .............................................................................................. ii Disclaimer ......................................................................................................................... iii List of Figures .................................................................................................................... vi Executive Summary............................................................................................................. 1 CHAPTER 1.0 – Introduction............................................................................................... 4 CHAPTER 2.0 – Background.............................................................................................. 6 Measurements of the Effectiveness of Dust Palliatives .....................................................10 CHAPTER 3.0 – Guidelines .............................................................................................. 16 Road Design and Maintenance...........................................................................................16 Palliative Selection..............................................................................................................20 Application .........................................................................................................................22 Areas Requiring Special Attention......................................................................................26 Maintenance .......................................................................................................................27 CHAPTER 4.0 – Summary................................................................................................. 31 CHAPTER 5.0 – References.............................................................................................. 3

Managing Dust on Unpaved Roads and Airports

INE/AUTC 14.1

Soil Stabilization Manual 2014 Update

Soil Stabilization is used for a variety of activities including temporary wearing curses, working platforms, improving poor subgrade materials, upgrading marginal materials, dust control, and recycling old roads containing marginal materials. There are a number methods of stabilizing soils including modifying the gradation, the use of asphalt or cement stabilizers, geofiber stabilization and chemical stabilization. Selection of the method depends on the soil type, environment and application. This manual provide tools and guidance in the selection of the proper stabilization method and information on how to apply the method. A major portion of this manual is devoted to the use of stabilizing agents. The methods described here are considered best practices for Alaska.State of Alaska, Alaska Dept. of Transportation and Public Facilitie

Evaluate H2RI Wicking Fabric for Pavement Application - Year 2

The Tencate H2Ri wicking fabric has proven to work well on two roadway sections on the Dalton Highway. In each the fabric has reduced the water content in the embankment resulting in a maintenance free section. This project used a 24 foot flume in the laboratory to evaluate the effectiveness of the fabric on well graded sand and organic silt. The fabric effectively removed the moisture in the well graded sand. However, the organic silt blinded the wicking fibers which eliminated the capillary moisture movement. The results also demonstrated that overlapping the fabric for joints is not efficientCHAPTER 1 INTRODUCTION .................................................................................................... 1 CHAPTER 2 LITERATURE REVIEW ......................................................................................... 1 2.1 Adverse Effects of Subsurface Water in Pavement Design .................................................. 1 2.2 Types and Sources of Subsurface Water ............................................................................... 5 2.3 Conventional Drainage Design Methods .............................................................................. 5 2.4 Comparisons of Conventional and New Drainage Design Concept ................................... 12 2.5 Geosynthetic Application in New Drainage Design ........................................................... 14 2.6 Geotextile with Wicking Ability ......................................................................................... 15 2.7 Case Studies of Geotextile with Wicking Ability ............................................................... 20 2.8 Potential Issues .................................................................................................................... 27 2.9 Reference ............................................................................................................................. 31 CHAPTER 3 TESTING FLUME SETUP .................................................................................... 33 CHAPTER 4 TEST RESULTS AND DISCUSSIONS ................................................................ 37 Case 1: Wicking Test for Sand .................................................................................................. 37 Case 2: Wetting Test for Sand ................................................................................................... 39 Case 3: Rewicking Test for Sand .............................................................................................. 41 Case 4: Wicking Test for Silt .................................................................................................... 43 Case 5: Rewicking Test for Silt ................................................................................................. 45 CHAPTER 5 SUMMARY AND CONCLUSIONS ..................................................................... 4

Improving Performance, Knowledge, and Methods to Provide Quality Service and Products

The objectives of this study were to educate staff about the impact of research in Alaska, enhance communication and coordination amongst stakeholders, and formulate a long-term research and implementation research plan for pavement and materials. Education begins with an overview of pavement design, construction and maintenance in Alaska since the 1900’s through a series of webinars. Interviews with five state materials engineers were used to explore best practices. Finally, a workshop focused on developing a coordinated research program and improve implementation activities. The workshop provided a series of recommendations to The Alaska Department of Transportation and Public Facilities which will enhance the value of the departments research program.Introduction ........................................................................................................................................................................ 1 Webinar 1: Overview Pavements at 30,000 ft, 10,000 ft, 10 ft. Big Number Value of Assets ....................... 3 Webinar 2: Research and Pavement Design, Construction, and Maintenance in Cold Regions (Roadway Embankments and Foundation) ...................................................................................................................................... 4 Webinar 3: Pavement Design, Construction and Maintenance in High Traffic Volume Urban Environments ...................................................................................................................................................................... 6 Webinar 4: Pavement Design, Construction and Maintenance Considerations in Rural Alaska .................... 8 Webinar 5: Pavement Best Practices in Alaska: Innovation and New and Emerging Technologies ............. 10 Webinar 6: Summary of Interviews with 5 State Materials Engineers and a History of the Alaska Statewide Materials Section .......................................................................................................................................... 14 Webinar Survey................................................................................................................................................................ 17 Workshop Summary ....................................................................................................................................................... 17 Recommendation 1: Webinars ................................................................................................................................ 18 Discussion ................................................................................................................................................................ 18 Recommendation 2: Selection of Materials-Related Research ......................................................................... 19 Recommendation 3: Literature Search .................................................................................................................. 19 Recommendation 4: Implementation ..................................................................................................................... 20 Open Discussion ......................................................................................................................................................... 21 Action Items ................................................................................................................................................................. 21 Appendix A: Webinar Series 1 - Overview of Pavement Design Appendix B: Webinar Series II - Construction and Maintenance in Cold Regions, Appendix C: Webinar Series III - Construction and Maintenance Considerations in Rural Alaska Appendix D: Webinar Series IV - Construction and Maintenance Considerations in Urban Areas Appendix E: Innovation: Webinar Series V - New and Emerging Technologies Appendix F: Webinar Series VI - Interviews with State Departments of Transportation Material Section Heads Appendix G: A Report on Interviews with State Departments of Transportation Material Section Head