Unstable slopes affect almost every state transportation department in all types of geographies. TRB will host a webinar on Monday, November 23, 2020 from 1:00-2:30 PM Eastern that will explore the geotechnical instrumentation and monitoring technologies that are used to inform safety, operational, and treatment decisions for these slopes. Presenters will discuss technology advancements that a...

Bridge design specifications were updated this year, with the largest change to designs for Mechanically-Stabilized Earth (MSE) walls in more than 20 years. TRB will host a webinar on Thursday, October 8, 2020 from 2:00-3:30 PM Eastern that will discuss these design updates. This webinar will identify how to use the Coherent Gravity Method for inextensible reinforcement, and will discuss two n...

Accurate and timely moisture measurement is important for properly compacting geomaterials during construction and to understand the environment below existing pavements. TRB hosted a webinar on Thursday, September 17, 2020 from 2:00 to 3:30 PM Eastern exploring newer, potentially less expensive and time-consuming methods that continuously measure moisture in pavement foundations. Presenters&n...

The fully grouted method of installing piezometers is increasingly popular, but it doesn’t work in every case. TRB hosted a webinar on Wednesday, July 8, 2020 from 2:00 PM to 3:30 PM Eastern to provide critical information regarding the most effective piezometer installations for the applications at hand. It focused on which factors to consider when deciding on a fully grouted instal...

Design and construction professionals were invited to a TRB webinar on Thursday, October 10, 2019, from 2:00 PM to 3:30 PM ET. The webinar provided an overview of Mechanically Stabilized Earth (MSE) walls and ground improvement methods. MSE structures allow for stabilization in soil environments that typically are not conducive to settlement and provide a path to easier infrastructure construct...

Stormwater management practitioners are invited to a TRB webinar on Thursday, August 15, 2019, from 2:00 PM to 3:30 PM ET. The webinar will provide guidance for determining appropriate siting and design of stormwater infiltration practices based on the limitations, risks, and benefits in the context of the built and natural environments. The practice of mitigating roadway runoff through infiltr...

TRB conducted a webinar on Monday, June 24, 2019, from 2:00 PM to 4:00 PM ET that discussed the cone penetration test (CPT), which can provide data for investigating and characterizing site specific subsurface conditions. Improperly characterizing subsurface conditions may increase risks during the planning, design, construction, and operation of transportation infrastructure. This webinar focu...

TRB conducted a webinar on Monday, April 1, 2019, from 2:00 PM to 3:30 PM ET that featured research from the National Cooperative Highway Research Program (NCHRP)’s Research Report 884 : Guidelines for Managing Geotechnical Risks in Design–Build Projects. This webinar discussed risk management tools for addressing geotechnical risks in design-build projects. Presenters described each tool, dete...

TRB conducted a webinar on Wednesday, March 6, 2019 from 2:00 PM to 3:30 PM ET that featured research from the National Cooperative Highway Research Program (NCHRP)’s Synthesis Report 519 : The Renewal of Stormwater Systems Using Trenchless Technologies. This webinar discussed how to replace aging stormwater facilities using open-cut or trenchless methods. The presenter also illustrated how to ...

TRB conducted a webinar on Tuesday, October 23, 2018 from 2:00 PM to 4:00 PM ET that explored how to use Drainage Requirements in Pavement (DRIP) software to design effective drainage systems for pavements. The absence of adequate drainage in pavements may lead to premature distress or failure of the pavement system, especially regarding load carrying capacity. The DRIP software, which can be d...

TRB conducted a webinar on Monday, September 17, 2018 from 1:00 PM to 2:30 PM ET that presented design equations for predicting the maximum lateral deformation and settlement of geosynthetic reinforced soil (GRS) under various configurations and service loads. This webinar examined both bridge abutments and reinforced soil foundation for pier support. Presenters described the development of the...

TRB conducted a webinar on Thursday,  November 2, 2017 from 2:00 PM to 3:30 PM ET that provided an overview of the geotech tools   website , produced by TRB’s second Strategic Highway Research Program (SHRP2) and managed by Iowa State University. Presenters discussed the background of the SHRP2 project that led to the website; the geotechnical design process, including evaluation of p...

TRB conducted a webinar on Tuesday, October 3, 2017 from 1:00 PM to 2:30 PM ET that illustrates ways to repair old bridges, close bridges, and find alternate structures or routes that adhere to budgetary restraints. Presenters discussed several options, including salvaging old parts, using accelerated bridge construction and modular construction techniques, building geosynthetic reinforced soi...

TRB conducted a webinar on Thursday, July 27, 2017 from 2:00PM to 3:30PM ET that described ways to use geofoam to address slope stability problems. Presenters provided information about the design methodology of geofoam and an overview of construction practices. Presenters also reviewed the standards for the use of geofoam in slope stability applications. The results of this research can be fo...

TRB conducted a webinar on Thursday, July 20, 2017 from 2:00PM to 3:30PM ET that provided an overview of Intelligent Compaction (IC) technology, including how IC can be applied to soils, bases, and asphalt layers. IC deals with the continuous assessment of compacted layer properties using roller vibration parameters and roller speed integrated with GPS to provide comprehensive compaction infor...

TRB conducted a webinar on Thursday, April 13, 2017, from 2:00PM to 3:30PM ET about buried structures such as culverts and bridges. Buried structures are an important part of state and regional transportation networks, which can be disrupted by extreme weather events. Repairing the damage after such events can challenge an agency’s resources and negatively impact the area’s economy by disruptin...

TRB conducted a webinar on Tuesday, November 15, 2016 from 1:00PM to 2:30PM ET on material from Chapter 5 of National Cooperative Highway Research Program (NCHRP) Synthesis 445 : Practices for Unbound Aggregate Pavement Layers. This webinar demonstrated how natural mineral aggregate and recycled/by-product aggregate, as used in granular base and subbase, is successfully compacted to form paveme...

TRB conducted a webinar on Monday, November 7, 2016 from 2:00PM to 3:30PM ET that provides an overview of satellite-based interferometric synthetic aperture radar (InSAR) technology with a particular focus on transportation infrastructure applications. This webinar discussed the underlying concepts of satellite radar remote sensing. The presenters provided examples of using InSAR to monitor roa...

TRB conducted a webinar on Monday, October 31, 2016 from 2:00 to 3:30PM ET that illustrated examples of electrical resistivity methods for geophysical applications, including underground voids, karst features, bedrock, clay, groundwater, and slope stability. This webinar featured case studies from the United Kingdom, the Minnesota Department of Transportation, and the private sector. This webin...

TRB conducted a webinar on Monday, September 12, 2016 from 2:00PM to 3:30PM ET on a new compaction device that can serve as a tool to improve soil-cement test specimen preparation. The plastic mold (PM) device can produce high-quality test specimens for soil-cement pavement layer thickness design testing, laboratory mixture design testing, and construction quality assurance testing. This webina...

TRB conducted a webinar on Monday, August 22, 2016 from 1:00PM to 2:30PM ET that discussed the construction of unbound aggregate layers. Roads last longer when unbound aggregate layers are built well. Because it is important to compact materials at the correct moisture levels, accurate and fast measurements of moisture and compaction during construction can improve quality and long term perform...

TRB conducted a webinar on Thursday, July 21, 2016 from 2:00PM to 3:30PM ET that discussed the use of near-surface geothermal energy for heating of transportation infrastructure. The relatively constant temperature and the thermal storage capacity of the ground can be used for snow removal and deicing of bridge decks, airport runways, and toll booth approach zones. It also can be used for heati...

TRB conducted a webinar on Wednesday, July 20, 2016 from 2:00PM to 3:30PM ET that featured research from National Cooperative Highway Research Program (NCHRP) Synthesis 467 : Visualization of Geotechnical Data for Hazard Mitigation and Disaster Response. This webinar discussed the report, which provides an overview of the visualization tools and techniques used for mitigating geotechnical hazar...

TRB conducted a webinar on Monday, September 28, 2015 from 2:00 PM to 3:30 PM ET that presented case studies incorporating geophysical methods into transportation subsurface investigation and monitoring programs. This webinar is a continuation of the 2014 TRB Webinar "The Benefits of a Bigger Geotechnical Toolbox: Case Histories." Geotechnical subsurface investigation programs provide informati...

TRB conducted a webinar on Wednesday, September 2, 2015, from 1:00 PM to 2:30PM ET that provided a case study about State Freight Economic Corridors (SFEC). This webinar presented a case study about how a state worked with freight shippers, receivers and carriers, both locally and regionally, to develop and identify SFEC. This webinar also explained how to best use existent data sets to GIS-map...

TRB conducted a webinar on June 24, 2015, from 1:00pm to 3:00pm ET that presented material closely aligned with Chapters 2, 3, and 4 of NCHRP Synthesis 445: Practices for Unbound Aggregate Pavement Layers . Webinar presenters showed how natural mineral aggregate and recycled/by-product aggregate (as used in granular base and sub-base layers of pavements) is obtained, selected, characterized, an...

TRB conducted a webinar on September 24, 2014 that highlighted examples of subsurface investigation programs where appropriately selected geophysical and in-situ testing methods have been incorporated. This webinar is intended for geotechnical engineers, engineering geologists, highway and structural engineers, project managers, and other transportation professionals interested in increasing th...

TRB conducted a webinar on April 30, 2014, from 1:00pm to 3:00pm ET that explored current topics on rockfall mitigation and management. This webinar was the second of a two-part series highlighting rockfall mitigation. In addition to providing substantive technical content on the topic, the webinars were intended to bring attention to the 2013 Transportation Research Board publication Rockfall:...

TRB conducted a webinar on April 24, 2014, from 1:00pm to 3:00pm ET that explored current topics on rockfall characterization. This webinar was the first of a two-part series highlighting rockfall mitigation. In addition to providing substantive technical content on the topic, the webinars were intended to bring attention to the 2013 Transportation Research Board publication Rockfall: Character...

TRB conducted a webinar on September 3, 2013 that will explore TRB’s National Cooperative Highway Research Program (NCHRP) Report 675: LRFD Metal Loss and Service-Life Strength Reduction Factors for Metal-Reinforced Systems . Contact Reggie Gillum at RGillum@nas.edu for instructions on receiving a link to the recorded webinar.  Webinar presenters will describe observed performance for galv...

TRB conducted a webinar on August 27, 2013 from 2:00 p.m.- 4:00 p.m. ET that presented  TRB’s National Cooperative Highway Research Program (NCHRP)  Synthesis 430: Cost-Effective and Sustainable Road Slope Stabilization and Erosion Control . Contact Reggie Gillum at RGillum@nas.edu for more information about the webinar recording. The presenters will share their experiences implementi...

** This webinar experienced technical difficulties on June 25. We will be broadcasting the second-half of the webinar on June 26, 2013 from 2:00 p.m. - 3:00 p.m. ET. Please re-register to view this June 26 webinar . TRB will conduct a webinar on June 25, 2013 from 2:00 p.m.- 4:00 p.m. ET that will present the results of a recently completed pooled fund research project on subsurface drainage fo...

As part of the SHRP2 Tuesdays Webinar Series, TRB conducted a webinar on June 11, 2013 from 2:00 p.m.- 3:30 p.m. ET that explored the project Performance Specifications for Rapid Renewal , which addresses the obstacles of defining fair and meaningful specification requirements when implementing rapid renewal performance specifications. View the recorded webinar . The benefits of performance spe...

TRB conducted a webinar on May 29, 2013 from 2:00 p.m.- 4:00 p.m. ET that presented the results of a recently completed pooled fund research project on subsurface drainage for slope stabilization. Contact Reggie Gillum at RGillum@nas.edu for information on accessing a link to the recorded webinar. This first webinar of a two-part series will introduce the research project, explain the limitatio...

TRB conducted a webinar on December 20, 2012, from 2:00 p.m. - 3:30 p.m. ET as part of a TRB second Strategic Highway Research Program (SHRP 2) project that explored a web-based information system for 46 geoconstruction and ground improvement technologies. Contact Reggie Gillum at RGillum@nas.edu to access a link to the recording of the webinar. The web-based information system, developed as a ...

TRB conducted a webinar on August 1, 2012, from 12:00 p.m.-1:30 p.m. ET that examined non-traditional road dust palliatives and soil stabilizers that may be cost-effective, long-lasting, and environmentally considerate alternatives. Contact Reggie Gillum at RGillum@nas.edu for information on receiving a recording of this webinar. The webinar is based on presentations given at a session titled D...

TRB conducted a webinar on July 18, 2012, from 2:00 p.m.-4:00 p.m. ET that explored asset management techniques for safety, geotechnical, and ancillary structures; signs and sidewalks; and more. Participants must register in advance of the webinar, and there is a fee for non-TRB Sponsor employees. Contact Reggie Gillum at RGillum@nas.edu for a link to the recorded webinar. The webinar will high...

TRB conducted a webinar on April 4, 2012, that explored methods to reduce sediment erosion from native and aggregate surfaced low-volume roads. Contact Reggie Gillum at  RGillum@nas.edu  to request a recording of the webinar.  This webinar will explore research conducted in the Pacific Northwest and Pennsylvania that tested alternative unbound aggregate treatments for the road su...

TRB conducted a web briefing or "webinar" on November 9, 2011 explored elementary equipment and soil testing methods that do not use sophisticated laboratory equipment. Contact Reggie Gillum at RGillum@nas.edu to request a recording of the webinar. The purpose of this webinar is to increase the ability of low-volume road managers who do not have access to laboratory testing facilities to make r...

On Monday, April 19, 2010, TRB conducted a web briefing or "webinar" that explored practical tips for using the Transportation Research Information Services (TRIS), Research in Progress (RiP), and Research Needs Statements (RNS) databases. For more details,  view a summary of this webinar. Watch a recording of the webinar. You will need  Windows Media Player 9 or higher to v...

On Wednesday, March 17, 2010, TRB conducted a web briefing or "webinar" that explored TRB's National Cooperative Highway Research Program Project 9-23A: a master catalog of soil properties from which soil-water characteristic curves can be calculated for use as a key input parameter to the Mechanistic-Empirical Pavement Design Guide (MEPDG).  For more details,  view a summar...

On October 28, 2009, TRB conducted a web briefing or "Webinar" that explored intrusive and non-intrusive experimental laboratory and field test methods for the estimation of stiffness properties (resilient modulus) of subgrades and unbound materials for pavement design. For more details,  view a summary of this webinar. Email Reggie Gillum at  RGillum@nas.edu to receive a link to...

On September 17, 2009, TRB conducted a web briefing or "Webinar" that explored the latest issues in slope maintenance and slide restoration for transportation maintenance professionals.  For more details,  view a summary of this webinar. Email Reggie Gillum at  RGillum@nas.edu to receive a link to the recording of this session. There is no fee for employees o...

On August 5, 2009, TRB conducted a web briefing or "Webinar" that explored updates to the Culvert Analysis and DEsign (CANDE) software.  For more details, view a  summary of this webinar.  Email Reggie Gillum at  RGillum@nas.edu to receive a link to the recording of this session. There is no fee for employees of TRB sponsors to receive this recording. Others must ...

View and listen to selected presentations given at the 88th Annual Meeting in Washington, DC on January 11-15, 2009, as part of the TRB’s Conference Recording series.  The TRB Conference Recording series is designed to bring information presented at TRB conferences and meetings to those who were not able to attend. To request an archived recording, email Reggie Gillum . There is no fee for...

On June 20, 2008, TRB conducted a web-seminar or “webinar” that explored culvert design information and best practice installation processes for transportation engineers and maintenance personnel. For more details,  view a summary of this webinar. Email Reggie Gillum at  RGillum@nas.edu to receive a link to the recording of this session. There is no fee for employees of TRB spon...

View and listen to selected presentations given at the TRB 87th Annual Meeting in Washington, D.C. , on January 13-17, 2008 , as part of the TRB’s Conference Recording series. The TRB Conference Recording series is designed to bring information presented at TRB conferences and meetings to those who were not able to attend.   To request an archived recording, email Reggie Gillum ...

View and listen to selected presentations given at the 86th Annual Meeting in Washington, D.C., on January 21-25, 2007, as part of the TRB’s Conference Recording series. The TRB Conference Recording series is designed to bring information presented at TRB conferences and meetings to those who were not able to attend.   To request an archived recording, email Reggie Gillum . There is no fe...

View and listen to selected presentations given at the TRB 2006 Annual Meeting Summary of Major Issues in Albany , NY , on March 15, 2006 prepared by the New York State Department of Transportation , as part of the TRB’s Conference Recording series. The TRB Conference Recording series is designed to bring information presented at TRB conferences and meetings to those who were not able to atten...

View and listen to selected presentations given at the 85th Annual Meeting in Washington , D.C. , on January 22-26, 2006 , as part of the TRB’s Conference Recording series. The TRB Conference Recording series is designed to bring information presented at TRB conferences and meetings to those who were not able to attend.   To request an archived recording, email Reggie Gillum . There is no...

2005 Joint Summer Conference : Conference Recording   View and listen to selected presentations given at the Joint Summer Conference in Boston , MA , on July 10-12, 2005 , as part of the TRB’s Conference Recording series. The TRB Conference Recording series is designed to bring information presented at TRB conferences and meetings to those who were not able to attend.   To request an...