August 27, 2026
Advancing Caltrans Bridge and Structures Project Delivery with BIM4I
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August 27, 2026
Lynn Hiel, PE, ENV-SP, Senior Bridge Engineer, Specialist (BIM) – Caltrans, Office of Bridge Design South, BIM Specialty Branch;
Bin Shen, PhD, PE, Branch Chief – Caltrans, Office of Bridge Design South, BIM Specialty Branch;
Peyman Kaviani, PhD, PE, Branch Chief – Caltrans, Office of Bridge Design South
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Announcements: This portion of the IBT/ABC-UTC Monthly Webinar will provide you with the latest happenings related to Innovative Bridge Technologies and ABC in the US and abroad to keep you informed. (10 minutes)
Featured Presentation: Advancing Caltrans Bridge and Structures Project Delivery with BIM4I (35 minutes)
Description:
This presentation provides a comprehensive look at Caltrans’ ongoing transition toward digital project delivery with BIM for Infrastructure (BIM4I). It begins with an overview of state, national, and international efforts including CA Assembly Bill 1037, prompting the current BIM4I adoption and the DES Roadmap. Progress to date and key organizational priorities will be highlighted. The session then introduces the overarching BIM4I strategy, including the Caltrans BIM4I Program, Senate Bill-1 (SB1) efficiency findings, information requirements based on ISO 19650 Frameworks, and ongoing research supported by transportation pooled funds and grants. Attendees will learn about emerging digital delivery processes through three active pilot projects demonstrating model-based workflows and the integration of roadway, structures, and other disciplines. The presentation also explores the data and technology advancements that Caltrans is leveraging such as Industry Foundation Classes (IFC) and openBIM® workflows. Education, industry outreach, and training efforts including partnerships with universities and professional associations will be discussed. Finally, the talk looks toward the future, emphasizing the Caltrans-Academia-Industry collaboration efforts, and the need to develop robust guidance and training materials that underpin successful digital delivery across the project lifecycle.
Presenters:
Lynn Hiel, PE, ENV-SP
Senior Bridge Engineer, Specialist (BIM)
Office of Bridge Design South, BIM Specialty Branch
California Department of Transportation
Lynn has been with Caltrans, Office of Bridge Design since 2019 and is chair of the Caltrans Division of Engineering Services BIM Committee. Before joining Caltrans, she was a BIM Lead with STRABAG/Züblin on building and infrastructure projects in Europe, including Blox – the Danish Architectural Center and the UK High Speed Two Railway. She believes that BIM has an important role in the public sector to support its mission of building and maintaining safe, high-quality infrastructure for the public good.
Linked-in Profile: https://www.linkedin.com/in/lh-4208/
Bin Shen, PhD, PE,
Branch Chief
Office of Bridge Design South, BIM Specialty Branch
California Department of Transportation
Bin Shen has served as a bridge engineer at Caltrans for seventeen years, specializing in the design of highway concrete box girder bridges and precast girder concrete bridges. Since 2020, he has been heavily involved and taken the lead in advancing Caltrans’ BIM initiatives, collaborating extensively with internal and external stakeholders. He currently holds the position of chief of the BIM Specialty Branch within Caltrans Bridge Design, where he co-leads efforts to implement BIM for bridges and structures alongside his colleagues.
Peyman Kaviani, PhD, PE,
Branch Chief
Office of Bridge Design South
California Department of Transportation
Peyman Kaviani has been with Caltrans since 2015 and holds the position of co-chair of the Caltrans BIM for Bridges and Structures Committee. In collaboration with the different divisions at Caltrans, he leads the effort of implementing BIM methodology for infrastructures and establishing innovative digital project delivery workflow for the life-cycle of infrastructures, particularly bridge structures. Peyman is an active member of ASCE Structural Engineering Institute (SEI) Digital Design Committee.
Linked-in Profile: https://www.linkedin.com/in/pkaviani
Presentation Photos/Graphics:
1). CIP-PS_Bridge: Isometric view of a concrete bridge 3D model with architectural texture
2) ERS_Image: BIM4I implementation of a Soldier Pile Ground Anchored wall project in construction phase
3) POC: Federated model of a pedestrian overcrossing bridge, existing and new retaining walls, utilities, and drainages
4) Steel_Bridge: 3D model of the steel plate girder and pier cap detail supporting construction during steel girder erection
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