Keynote Speakers

Keynote Talk: Remarks by U.S. Congressional Representative

Presenter: Congressman Mario Diaz-Balart (FL-25), Ranking Member of the House Appropriations Subcommittee on Transportation, Florida, USA






Keynote Talk: Remarks by U.S. Congressional Representative

Presenter: Congressman Carlos A. Gimenez (FL-26) Highways and Transit Subcommittee, Florida, USA






Keynote Talk: UHPC Bridge Deck Overlays and Beyond

Presenter: Eugen Brühwiler, Prof. Ph.D., P.E., Swiss Federal Institute of Technology (EPFL) Lausanne, Switzerland

Presentation Description: Since the first pilot project in 2016, UHPC bridge deck overlays have quickly evolved in the U.S. into a novel technology to enhance existing bridge deck slabs and to accelerate rehabilitation works. This UHPC technology is based on developments in Europe, in particular in Switzerland. The lecture highlights major achievements worldwide and explores next steps in using UHPC to strengthen and modifying existing bridges as well as to design and build new road and railway bridges, while lowering the environmental impact of bridges and enhancing sustainability of built infrastructure. Finally, recent Research & Development activities will be highlighted.

Bio: Eugen Brühwiler is a Professor of structural engineering at EPFL – the Swiss Federal Institute of Technology in Lausanne Switzerland. His teaching and research activities include modern methods of fatigue and safety assessment of existing bridges using data from monitoring as well as the use of UHPC for the rehabilitation and strengthening of bridges. As a consulting engineer, he is involved in numerous UHPC projects, mostly related to bridges and buildings, in Switzerland and abroad.

Keynote Talk: Composite Bridges with Prefabricated Deck Elements

Presenter: Dr. Peter Collin, Ph.D., Professor in Composite Structures, Lulea University of Technology, Sweden

Presentation Description: One major advantage of composite bridges compared to concrete bridges is that the steel girders can carry the weight of the formwork and the wet concrete. Another advantage is the savings in construction time, which saves some money for the contractor but even more so for the road users, a fact that usually is neglected when evaluating alternative bridge designs. A further step to improve the competitiveness of composite bridges is to prefabricate not only the steel girders, but also the concrete deck. Dr. Collin will present a unique concept with dry joints between the elements, used in designing 3 bridges. Another technique that reduces the investment as well as the maintenance costs, is integral abutments. In this case, the end piers, expansion joints and bearings are excluded, and the piles are introduced in the end screens at the ends of the bridge. Measurements from a real bridge as well as laboratory tests on low cycle fatigue of the piles will be presented.

Bio: Dr. Peter Collin received his PhD degree from Luleå University of Technology (LTU) in 1992 specializing on stability of steel frames. He has since been working with design and development of steel- and composite bridges, including bridges with deck elements and integral abutments. This included I-girder and box girder bridges for road, railway, and pedestrian traffic. During 1993-1994, he worked with the Öresund Bridge between Sweden and Denmark, writing project codes based on Eurocode 3 (Steel Structures) and 4 (Composite Structures). He has taught the industry on design using Eurocodes, which were introduced in Sweden in 2010. In 2007, Collin was appointed professor in Composite Structures at LTU. Besides that he also works with steel/composite bridges at Ramböll which is a consultant company with 10,000 employees.

Keynote Talk: Development of ABC Resources for Implementation of ABC in the United States

Presenter: Michael P. Culmo, P.E., Clough Harbour and Associates, LLP, Connecticut, USA

Presentation Description: Accelerated Bridge Construction has been used in the United States for decades. Prior to the early 2000s, ABC was used for special projects where there were no other options. Since then, key stakeholders including AASHTO, FHWA, NCHRP, State Departments of Transportation, academia and industry have progressed the field of ABC to make it common practice in virtually every state. Early ABC projects were designed using the AASHTO LRFD Bridge Design Specifications, long with a healthy dose of engineering judgement. The key to full adoption of ABC in the United Stated hinged on the development of engineering resources that can be used by designers to develop successful designs. Many resources are now available, with the most important being the 2018 AASHTO LRFD Guide Specifications for ABC. This keynote address will focus on the development of the resources that are currently available to practicing engineers.

Bio: Mike is a Bridge Engineer with over 37 years of experience in the design of steel, concrete, prestressed concrete and timber bridges. He has special expertise in the field of accelerated bridge construction technologies and constructability engineering. He is the principal author of numerous publications in the field of ABC, including the 2018 AASHTO LRFD Guide Specifications for Accelerated Bridge Construction. He is a licensed professional engineer.

Keynote Talk: UHPC Field Applications in Switzerland

Presenter: Laurent Boiron, Managing Director Europe at UHPC Solutions, Civil Engineer, Schlieren, Switzerland

Presentation Description: Since 2003, more than 11’000 m3 (14’400 yd3) of UHPC have been built in Switzerland. The main volumes are realized as protective and/or reinforcement layer. The lecture will present a few emblematic projects built recently. The focus will be on the contractor’s point of view about adapting building methods and production capacity to the jobsite with its room and schedule restrictions. A quick summary of other technically interesting projects will be presented to show new possible applications of UHPC in railway and highway.

Bio: Laurent Boiron is a civil engineer and presently the European managing director of UHPC Solutions, a company specialized in UHPC production, placement & technical consulting. He worked previously at LafargeHolcim where he developed the UHPC market in Switzerland. Laurent is managing projects and developing UHPC Solutions in Europe since 2019. With more than 160 UHPC projects experience he is consulted as technical expert and part of the UHPC swiss standard committee.

Keynote Talk: NCHRP Solving Transportation Challenges Through Research

Presenter: Waseem Dekelbab, Ph.D., P.E., PMP, Senior Program Officer, National Cooperative Highway Research Program (NCHRP), Washington, D.C., USA

Presentation Description: Because of the dynamic nature of U.S. transportation systems, state departments of transportation (DOTs) are always facing new, usually complex challenges. In response, the states turn to the National Cooperative Highway Research Program (NCHRP) to focus some of the best minds in transportation on collaborative research that leads to far-reaching solutions. NCHRP focuses on the nation’s critical transportation issues, producing research findings that guide practice in U.S. transportation and that result in safer roads, reliable travel, and substantial savings of taxpayer dollars. Since its inception in 1962, NCHRP, which is administered by the Transportation Research Board of the National Academy of Sciences, Engineering, and Medicine, has delivered research findings and recommendations that make a difference. NCHRP has played a key role in developing essential tools of the trade—for example, the Highway Capacity Manual, American Association of State Highway and Transportation Officials’ (AASHTO) bridge specifications, and AASHTO’s pavement design guide—that continue to provide the United States with the world’s best design and construction practices. This presentation highlights research conducted under NCHRP and funded by AASHTO to help bridge owners, fabricators, and contractors successfully use prefabricated bridge elements and systems and bridge moves for accelerated bridge construction.

Bio: Dr. Waseem Dekelbab joined TRB as a Senior Program Officer in November 2008 and primarily manages NCHRP bridge-related research projects. Before joining NCHRP, Dr. Dekelbab worked on-site at the Turner-Fairbank Highway Research Center as principal investigator of the Bridge Management Information Systems (BMIS) laboratory supporting the Long-Term Bridge Performance (LTBP) Program while employed by Science Applications International Corporation (SAIC) under contract with the FHWA. Dr. Dekelbab assisted in developing NCHRP Report 495 and other DOT projects that address bridge truck loadings, deterioration, and cost, including early-age deck cracking, concrete fatigue, and steel member fatigue. He has led many consulting forensic projects using Finite Element (FE) analysis and is a co-author of several bridge research reports and papers published by TRB, USDOT, ASCE, and ACI. Dr. Dekelbab taught structural design at the University of Maryland-Eastern Shore. He also received a certificate of training for “Safety Inspection of In-Service Bridges” from the FHWA’s National Highway Institute and he is a certified Project Management Professional—PMP®. Dr. Dekelbab holds a Bachelor of Science degree in structural engineering from Damascus University in Damascus, Syria, and an M.S., and Ph.D. degrees in structural and bridge engineering from Wayne State University in Detroit, Michigan. Dr. Dekelbab is a registered professional engineer (PE) in Michigan, New York, and Virginia.

Keynote Talks:
UHPC: Bridge Design with UHPC
UHPC Bridges: A Path Forward

Presenter: Benjamin A. Graybeal, Ph.D., P.E., Structural Engineer, Office of Infrastructure Research Federal Highway Administration (FHWA), Virginia, USA

Presentation Description: We know how to produce ultra-high performance concrete. We know how to fabricate components with UHPC. Soon, we can expect to have standardized structural design processes relevant to UHPC. Bridges and bridge components in the U.S. are designed according to the AASHTO Load and Resistance Factor Design Bridge Design Specifications (LRFD BDS). The strong and growing interest in the use of UHPC for primary bridge components has led AASHTO’s Concrete Bridge Design Committee to begin addressing the need for UHPC-focused design guidance. Specifically, the committee is considering the balloting and publication of a proposed Guide Specification for Structural Design with UHPC. This document, developed by a team of researchers at the U.S. Department of Transportation’s Federal Highway Administration, parallels existing bridge design processes while integrating additions and revisions relevant to the behaviors of UHPC. Largely based on the fundamental mechanical behaviors of UHPC-class materials, the provisions in the guide specification allow a designer to define required UHPC properties according to standardized tests then to apply those properties within structural member behavioral models. The behavioral models rely on both stress and strain behaviors of the included structural materials, leading to predictions of member response at relevant limit states. Through this design process, designers can engage the unique mechanical behaviors of UHPC to create novel solutions that are architecturally pleasing, structurally optimized, and constructible.

The presentation will introduce the proposed UHPC guide specification, offering insight into the concepts and details of the design methodology. Key aspects include:

· UHPC tension and compression mechanical models,
· stress and strain limits for UHPC components,
· flexural design at the service and ultimate limit states,
· beam shear design at the service and ultimate limit states,
· interface shear design,
· creep, shrinkage, and prestress loss predictions,
· steel reinforcement detailing, and
· durability considerations.

Whether being used for optimized pretensioned girders; durable, cost-effective piles; resilient deck elements; or long-lasting bridge preservation and rehabilitation actions, UHPC is creating opportunities for innovators to develop compelling solutions that address the needs of today’s infrastructure owners.

Bio: Ben Graybeal is the team leader for Bridge Engineering Research in the FHWA Office of Infrastructure Research. He also leads FHWA’s structural concrete research efforts. His expertise includes bridge engineering, structural concrete, concrete materials, and forensic investigations. He has a wealth of experience with UHPC, having been a leader in the UHPC community since FHWA began focusing on this topic in 2001. He is the chairman of the American Concrete Institute technical committee on UHPC and is the co-chairman of the International Interactive Symposium on UHPC conference series most recently delivered in June 2019. He is leading the ongoing effort to develop UHPC structural design guidance as a supplement to the AASHTO LRFD Bridge Design Specification.

Keynote Talk: Acceleration Versus Beauty? – The Role of Prefabrication in Bridge Construction

Presenter: Mike Schlaich, Prof. Dr. sc.techn., one of the managing partners (managing directors) of schlaich bergermann partner sbp., Professor at Technische Universität Berlin, Chair of Conceptual and Structural Design, Berlin, Germany

Presentation Description: Our bridges should be safe, economic and beautiful. Economy is closely connected to speed of construction and thus to prefabrication. Especially if new materials and new ways of design, fabrication and erection are looked at our (prefabricated) bridges can become more resource efficient also.
Recent research in the field of bridge design in Germany and a range of unconventional prefabricated bridges will be presented here. The range bridges to presented spans from applications in India to Germany, from carbon-posttensioned concrete elements to doubly-curved stainless shells.
The issue of sustainability, climate-change and new mobilities have certainly caused a paradigm-change also in the field of bridge design and shed a new light on how we work. In the end, however, bridges should increase our quality of life, they should contribute to what in Germany is called “Baukultur”. This is what this lecture will be about.

Bio: Mike Schlaich is one of the Managing Directors of schlaich bergermann partner (sbp), Professor of Conceptual and Structural Design at the Technische Universität Berlin and certified German proof checking engineer. His executed projects range from signature bridges and long-span roofs to stadia, office and highrise buildings and other exeptional structures. Mike´s research work includes extradosed bridges, bending and fatigue of strands for bridge cables, carbon fibre tension elements, movable and adaptive structures, as well as the use of new materials such as carbon and infra-lightweight concrete. He is a member of the Berlin-Brandenburg Academy of Sciences and Humanities and a gold medalist of IStructE.

Keynote Talk: ABC Trends and Practices in Seismic Regions

Presenter:  Bijan Khaleghi, PhD, PE, SE, State Bridge & Structures Design Engineer, Washington State Department of Transportation, Washington, USA

BIO: Bijan Khaleghi is the State Bridge Design Engineer with the Washington State Department of Transportation (WSDOT) Bridge and Structures Office, and adjunct professor at Saint Martin’s University. He is a member of AASHTO Technical Committees on Movable Bridges T-8, Concrete Bridges T-10, Tunnels T-20, WRA-PIARC, TRB committees on ABC, Concrete, and Tunnels. He is also a member of American Segmental Bridge Institute, Precast/Prestressed Concrete Institute, and National ABC Center at FIU. Bijan is recipient of PCI Robert J. Lyman award, October 2018, PCI Fellow Award, February 2018, ASCE T.Y. Lin Award, March 2014, Charles C. Zollman Award, PCI Journal 2011 and 2013, ASCE SEI T.Y. Lin Award, May 2006, Martin P. Korn Award, PCI Journal Award 2005.

Keynote Talk: ABC-US Experience from Consultant Viewpoint and Opportunities

Presenter: Bala Sivakumar, P.E., Vice President, Bridge Line of Business Director, East Region, T.Y. Lin International, New York, USA

Presentation Description: implementation in the U.S. has been significantly advanced due to the leadership of state DOTs in partnership with federal, academic and industry partners. Bridge design consultants have been at the forefront of implementing ABC as ABC has evolved over the past 15 years from a specialized technique applied by contractors to an important delivery method in the toolbox of bridge owners. Initial impediments to using ABC including the lack of national design codes and construction specifications, owner’s policy guidance for ABC use, and local contractor and fabricator experience have been greatly alleviated. Many State DOTs have incorporated ABC policy guidelines and design standards in their Bridge Design Manuals. Consultants have a greater array of tools and technologies at their disposal for ABC design. In an age of limited resources, challenges still remain with how we justify ABC techniques compared to conventional methods. ABC training opportunities to better educate the design and construction community also needs to be a focus. This presentation will provide a Consultant’s viewpoint of the practice of ABC in the US.

Bio: Bala Sivakumar has more than 38 years of national bridge engineering experience and is an expert practitioner in Accelerated Bridge Construction (ABC). He has served as the lead designer of ABC projects in several states. He served as the Co-Principal Investigator on SHRP2 R04 Project entitled Innovative Bridge Designs for Rapid Renewal, which includes national ABC standards, guidelines for design drawings, guidelines for erection systems, and LRFD design and construction specifications. He was also the primary developer and author of the SHRP2 ABC Toolkit published in 2012 to promote ABC implementation nationally. Bala has conducted ABC workshops, seminars and national webinars.

Keynote Talk: U.S. Department of Transportation

Presenter: Firas Sheikh Ibrahim, Ph.D., P.E., Office of the Assistant Secretary for Research and Technology (OST-R), U.S. Department of Transportation, Washington, D.C., USA

Bio: Dr. Firas Ibrahim is the Director of the U.S. DOT’s Office of Research, Development, and Technology. In this role, he provides leadership to ensure that RD&T programs and activities across the Department and University Transportation Centers advance the Department’s goals and priorities, and that research is of the highest quality.
Dr. Ibrahim was previously the Federal Highway Administration’s Lead Manager for Stewardship & Oversight. In that role, he provided stewardship and oversight leadership to ensure the successful delivery of the $44 Billion Federal-aid highway program annually, and the alignment of enterprise activities and resources with priorities. He served in various leadership position within FHWA.
Dr. Ibrahim served as the Surface Transportation Team Leader at the United States Embassy in Kabul, and Transportation Counselor and Attaché at the United States Embassy in Baghdad. He also held positions in Academia and the private sector.
Dr. Ibrahim holds Doctor of Philosophy, Master of Science, and Bachelor of Science degrees in Civil Engineering. He is a licensed Professional Engineer in the State of Pennsylvania.

Keynote Talk: Welcome and National ABC Perspective Update

Presenter: Carmen Swanwick, P.E., S.E, Deputy Director Region 2, Utah Department of Transportation, Utah, USA

Presentation Description: Carmen Swanwick will provide opening remarks and discuss the current AASHTO Committee on Bridges and Structures national initiatives involving accelerated bridge construction.

Bio: Carmen Swanwick is the Utah Department of Transportation (UDOT) Region 2 Deputy Director. Carmen served as the Department’s Chief Structural Engineer for almost ten years and has over 15 years of experience as a consultant in structural engineering within the transportation industry. She received both her Bachelors and Masters degrees from the University of Utah in Civil/Structural Engineering. Carmen is the AASHTO Committee on Bridges and Structures Chair and for the last six years served as the AASHTO Committee on Bridges and Structures (COBS) T-4 Committee on Construction Chair. Carmen participates in numerous National Cooperative Highway Research Program (NCHRP) projects and Transportation Research Board (TRB) Committees. Carmen has been involved in several Department initiatives through the years including the Accelerated Bridge Construction (ABC) program, development of the Unmanned Aerial Systems (UAS) program and recently the Digital Delivery effort with an emphasis on Building Information Modeling (BIM) for bridges and structures.

Keynote Talk: Bridge Systems and Accelerated Bridge Construction Applications in the Chinese High-Speed Rail Network

Presenter: Dr. Gongyi XU, Ph.D., Deputy Chief Engineer, China Railway Major Bridge Reconnaissance & Design Institute, Wuhan, China

Presentation Description: About half length of the 39000 km Chinese High-speed Railroad network are on bridges. Chinese bridge engineers have developed many innovative solutions to meet the challenges from vast and diversified environments. The west part of China, the network passes through mountainous terrain with deep gorges and high seismic area. On the east part of China, engineers must navigate through dense urban development with unique structures or to cross major rivers with long span bridges.

The presentation will cover key technologies in the high-speed rails system, such as standard short-span viaduct modular construction, typical concrete box, or truss bridges for median spans, special arch bridges in the mountainous region, and long span suspension / cable stayed bridges for major river crossings. Unique solutions such as concrete / steel truss arches, suspension bridges with heavy rail loading and stinging deflection requirement for high-speed, continuous cable supported structure with multiple pylons will be discussed in detail.

Bio: Dr Gongyi Xu is one of the top bridge engineers in China. He has made significant contributions in long span bridges for high-speed railways, suspension bridges with multiple towers and double decks. He has designed more than 30 suspension bridges and 20 cable-stayed bridges. He is the lead designer for the 1700m main-span Yangsigang Yangtze River Bridge, the 1092m main-span Wufengshan Yangtze River Bridge, and the 938m main-span Qingshan Yangtze River Bridge. Dr. Xu has been awarded: International Medal (2018), Institution of Civil Engineers, UK, George Richardson Medal (2020), IBC, USA, John Roebling Medal (2018), IBC, USA.

Keynote Talk: Engineering Practice and Research of Prefabricated Bridges in China

Presenter: Mr. Liang Zhou, Chief Engineer, Shanghai Urban Construction Design & Research Institute (Group) Co., Ltd., China

Presentation Description: Prefabricated bridge technology is widely regarded as an efficient, low-carbon and environmentally-friendly bridge construction technology. Benefit tinged from its large infrastructure construction program and efficient manufacturing base, China has made significant progress in the design, construction method and equipment for prefabricated bridges. This presentation pro-vides a comprehensive introduction to prefabricated bridges and ABC construction in China, with focuses on 1) representative ABC technologies with project examples; 2) fabrication and erection equipment for bridge superstructures; and 3) engineering practice and research on connection details for prefabricated bridge substructure systems.

Bio: Mr. Liang Zhou is regarded as one of the most prestigious bridge engineers in China. In the 38 years of his esteemed career, he has pioneered large span bridge design and the ABC method for viaduct construction in China. His ABC project achievements includes the Humin Viaduct (3km long and 25m wide elevated expressway with streamline cross section), Hengliaojing Bridge (55m+125m+55m continuous box girder bridge lifted-into-place) and Jiamin Viaduct (8km fully prefabricated bridge). Due to his significant contributions to Chinese bridge development, Mr. Zhou has won numerous awards, such as the 2008 Outstanding Structure Award (Shanghai Lupu Bridge) by the IABSE. Mr. Zhou is also actively involved in research and development; and is the chief editor of the Chinese National Code for Design of Steel-Concrete Composite Bridges.

Keynote Talk: Accelerated Bridge Construction for Long Span Bridges and Viaducts

Presenter: Theodore P. Zoli, III, P.E., Senior Vice President, National Bridge Chief Engineer, HNTB Corporation, New York, USA

Presentation Description: Accelerated Bridge Construction (ABC) has demonstrated value across the entire spectrum of bridge types. With a focus on the design and construction of recent long-span bridges and viaducts, this presentation will describe the use of ABC techniques and their impact on fast-track bridge/viaduct replacement projects. While the use of ABC has resulted in significant time savings in delivering long-span bridges and viaducts, the potential for these structural systems to have enhanced redundancy and robustness and to incorporate components that are easier to inspect and replace cannot be overlooked.

Integrating construction strategies into the design has also been critical to the successful application of ABC for long span bridges. The presentation will focus on how this integrated approach of design and construction can lead to new opportunities in delivering long span bridges with ABC. A recent long span bridge project, where integrated design and construction led to the development of new erection equipment with broad applicability to bridge replacement projects, will be explored.

The presentation will end with research on new ABC bridge systems that are focused not only on rapid erection, but rapid fabrication, with the goal of dramatically reducing overall project duration. The adaptation of fabrication techniques developed in other infrastructure sectors offers the potential for bridges to use in-stock materials and manufacturing-on-demand workflows. Additionally, this research explores the value of modular prefabricated connections, where significant savings in fabrication/erection time and complexity can be achieved. This research more generally uses a “kit-of-parts” strategy which promises not only faster fabrication, but faster design and shop drawings as keys to an overall reduction in project duration.

Bio: During Zoli’s 30+ years with HNTB, he has led the design of numerous innovative first-of-their kind bridges including the hybrid cable stayed Leonard P. Zakim Bunker Hill Bridge in Massachusetts, the network arch Lake Champlain Bridge between New York and Vermont, and the gusset-less truss for Memorial Bridge between Maine and New Hampshire. Licensed in 16 states, Zoli also currently serves as an adjunct professor at Columbia University and University of Notre Dame. Zoli was made a MacArthur Fellow and selected as ENR’s Award of Excellence winner, considered the construction industry’s most prestigious honor. 

Keynote Talk: Caltrans Accelerated Bridge Construction Manual

Dorie E. Mellon, P.E., Senior Bridge Engineer – Accelerated Bridge Construction, Office of Structure Quality Management, Structure Policy & Innovation, Division of Engineering Services, Caltrans, California, USA
Jay Holombo, P.E., T.Y. Lin International, California, USA

Presentation Description: Caltrans and T.Y. Lin International (TYLI) have developed an Accelerated Bridge Construction (ABC) Manual for California. This is a comprehensive manual providing guidance on planning, design and construction of ABC projects. Manual development tasks included researching and synthesizing ABC state-of-the-practice, industry outreach, preparing manual drafts, responding to comments and finalizing the document for publication. An initial draft was distributed to the industry in March for review and comment, and the ABC manual is scheduled for publication in August of 2021.

The purpose of the manual is to provide planners and engineers with a basic understanding of the different ABC methods available, help guide project specific selection of ABC methods, and encourage the use of ABC methods. The Manual supports efficient and consistent ABC practice in California by providing guidance for the evaluation, planning, design, construction, and administration of projects using ABC design methods and materials. At the planning phase, the ABC Manual has guidance and tools for determining whether ABC should be used over conventional bridge construction. If ABC is selected, the manual provides guidance on determining the ABC method that is most appropriate for the project based on the goals, opportunities, and constraints of the project. At the design phase, the ABC manual provides detailed guidance on the design of projects using move-in methods, where entire bridge span(s) are constructed and then moved into place using lateral slide, Self-Propelled Modular Transporter (SPMT), large crane, or longitudinal launch systems. Detailed guidance is also provided on ABC using prefabricated bridge elements (PBE) rapidly assembled in place. Closure and connection materials, such as non-shrink grout, rapid strength concrete (RSC) and ultra-high performance (UHPC) are discussed. At the construction phase, the manual provides guidance on construction aspects that are unique to ABC, including roles and responsibilities, submittal requirements, layout, tolerances, mock-ups and communication protocols. The manual appendices provide checklists for the planning, design and construction of PBE, SPMT and lateral slide projects as well as a checklist and information on the effective implementation of UHPC.

Implementation of the Caltrans ABC Manual is in alignment with Caltrans Strategic Plan by placing a priority on safety and innovation to provide a reliable transportation network while reducing construction related impacts.

Bio: Dorie Mellon is a Senior Bridge Engineer and Accelerated Bridge Construction (ABC) Specialist in the Division of Engineering Services (Structures) at Caltrans. Since 1986, Ms. Mellon has worked in the areas of bridge design, construction, seismic research, cost estimating, constructability review and the

implementation of innovative methods and technologies to improve transportation project delivery in California. Over the last 10 years her focus has been mainstreaming ABC in California through research deployment, outreach, development of planning tools, and the standardization of design and construction policy and practice.

Ms. Mellon serves as the Caltrans ABC Technical Committee Chair and is a primary author of the 2021 Caltrans ABC Manual. She was a member of the NCHRP Project Panel 12-98 “Guidelines for Tolerances for Prefabricated Bridge Elements and Calculating Dynamic Effects in Large-Scale Bridge Moves” and is the recipient of the 2017 Professional Engineers in California Achievement Award and 2021 James E. Roberts Award for Outstanding Engineering and Management in Transportation.

Bio: Mr. Jay Holombo is a Principal Engineer with T.Y. Lin International.  He has over 30- years of bridge engineering experience, and he has Bachelor of Science in Civil Engineering and a Ph.D. in Structural Engineering at the University of California, San Diego.




Keynote Talk:  Building Information Modeling (BIM) for Transportation Infrastructure: the future of project delivery and asset management 

Tristan McDonnell
, BEng (Hons) CEng MICE, Civil Engineer and Director at Arup, London
Joost Schlebaum, BIM Manager at Arup, Amsterdam

Presentation Description: Building Information Modeling (BIM) has been widely used in the vertical industry, however, due to the lack of national BIM standards, its use for transportation infrastructure has been very limited. To overcome these challenges significant efforts by state DOTs are underway. These efforts include collaboration with buildingSmartInternational (bSI) and software developers to advance BIM adoption in the US.   This presentation will provide an overview of the bSI Infrastructure Room where global partners  are working alongside industry peers to develop an international open data standard (called IFC4.3) for road and bridge modeling that is now being implemented by leading software vendors. This same IFC Schema has now been adopted by AASHTO for member States to apply as a national standard for engineering model data in the US.   Three case studies will be presented on projects in Germany, the Netherlands and the UK to illustrate how Arup, a major participant in bSI Infrastructure Room, is using BIM and the IFC open standard for better bridge design, more efficient collaboration with contractors and enhanced information exchange with clients for asset management. The case studies are: 

1. Schwelmetalbrucke bridge, Germany– a bridge renovation project that pushes boundaries by delivering the project using IFC schema, as required by the German highway agency. The IFC deliverables contained the full phasing, temporary works and the geometry as well as asset management related parameters.
2. Van Brienenoordbridge, Rotterdam – the busiest bridge in the Netherlands. The proposal is to remove and replace part of the bridge with a refurbished bridge, embracing circular economy principles. Arup is delivering IFC to our client and to the contractor. The IFC files contain asset management related parameters.
3. RAF Newton bridge, UK – a footbridge that will provide a link across the A46 connecting the former RAF Newton site providing a catalyst for growth in the area. Arup has applied a parametric modeling approach and cloud based co-ordination as well as delivering the design as IFC.

Bio: Tristan is a Civil Engineer and Director at Arup in London where he leads the Civil Engineering group, delivering designs on significant development projects across the globe. Tristan is an elected member of BuildingSMART’s InfraRoom Steering Committee and in this capacity he is actively supporting bSI’s drive to digitally transform the built asset industry, with an emphasis on the Infrastructure Sector.



Bio: Joost is a BIM manager at Arup in Amsterdam, where he leads the infrastructure BIM team. Joost has worked on a variety of national and international BIM projects and is influencing cutting edge BIM and digital developments.