WisDOT's development of their Construction Data Packet

IHEEP 2024

Last updated: 2024-09-17

IHEEP Conference 2024 Des Moines, Iowa

Steve Popke - WisDOT

Eric Gates - EnvisionCAD

September 17, 2024

Data Delivery

Before Civil 3D requirement

  • Contractor Staking Packet
  • Field Control
  • Existing DTM
  • Existing Topo and Utilities
  • Reference Line
  • Design Profile
  • Superelevation
  • Cross Section Slope Stake Report

  • Right-of-Way Monumentation

No design surfaces

Surface Models

One of the goals of Civil 3D implementation

  • Facilitate better communication between engineers, contractors and stakeholders

  • Fully support Automated Machine Guidance construction activities

Contractor Outreach

Communication is required

  • Obtain feedback on digital deliverables
  • What surface elements are needed?
  • Surface model detail

  • Design effort vs Construction benefit

Outreach Insights

Pre-bid benefits

  • Communicate design intent in 3D through the existing and proposed surfaces
  • Readily analyze and confirm the project quantities
  • Construction operations and operational alternatives can be planned and optimized to a much greater level of detail

Construction activity benefits

  • Design surface breaklines are key

    • Provide the building blocks for construction model surfaces
    • Organize to develop staging models based on contractor operations
    • Supplement to provide additional surface model detail

  • Direct import of design data into survey equipment

Digital Data Delivery

Today

  • Construction Data Packet (CDP)

    • A collection of electronic design files and data that has been exported from Civil 3D
    • Digital data is provided in common file formats
    • Available to contractors at project advertisement

For Information Only

It is only provided for the contractor’s general knowledge and is not a part of the construction project contract

Project requirements

  • Provided on all WisDOT state trunk highway projects with a geospatially accurate reference alignment
  • Data required for a project is dependent on project scope
  • Not required on Local program projects but can be submitted

Construction Data Packet (CDP)

Metadata form

image-20240916191934606

Existing condition deliverables

  • Field Control Data
  • Existing 3D Surface Model
  • Existing terrain
  • Rock
  • Existing Topography – General
  • Existing Topography – 2D Utilities

Proposed geometry deliverables

  • Alignments
  • Profiles
  • Superelevation data
  • Layout points
  • Roadway features
  • Structure horizontal features

Proposed surface model deliverables

  • Breaklines, DTM, Boundary

    • Top
    • Datum (Subgrade)
    • Top rural driveways
    • Subgrade Improvement

  • DTM, Boundary

    • Excavation Below Subgrade (EBS)
    • Marsh excavation
    • Rock excavation

  • 3D design surface models

    • Top & Datum surfaces

      • 3D breaklines (*.dwg)
      • Surface boundary (*.dwg)

      • DTM surface (*.xml)

image-20240916192242261

image-20240916192253876

image-20240916192300976

Other deliverables

  • Proposed Cross Section Data
  • Earthwork Estimate Data (Average End Area)
  • Sample Line locations for earthwork
  • Right-of-Way Monumentation Data

Design to Construction Delivery Process

  • Designer electronically submits CDP zip file with project PS&E documents
  • Central Office (MDU) performs a data export check

  • CDP is posted on WisDOT website with plans and specifications

WisDOT Construction bid letting - General process overview (wisconsindot.gov)

Customization Supporting CDP Delivery

Custom Civil 3D subassemblies

  • Updated .NET subassemblies using Subassembly Composer
  • Provided full user control of subassembly point, link and shape codes

  • Enabled the targeting of horizontal and vertical objects

image-20240916193552507

Repurposing Out-of-the-Box (OOTB) tools

  • Curb Ramps

    • Used drainage structures “dynamic” staking points

  • Corridor Transitions

    • Used numeric profile values as targeted transition data

Coding in C#

  • Export Tools Developed

    • Structures to Point LandXML
    • Sample Lines to LandXML
    • Reports
    • Design Surface Data Extractor
    • Create Verification Surface

    • Assign CDP Breakline Layers

image-20240916193814050

Key Take Aways

  • Regular communication with contractors & stakeholders
  • Create one powerful method
  • Develop efficient workflows using OOTB tools
  • Customization and repurpose OOTB tools to meet workflow needs

General Take Aways

  • Be willing to adapt
  • Collaborate and learn from others
  • Leverage/Maximize your current technology
  • Implement new technology

Thank you!

Resources: