3D Technologies (e.g., AMG) and Seamless (?) Data Flows: Impediments and Strategies

3D Technologies (e.g., AMG) and 3D Technologies (e.g., AMG) and Seamless (?) Data Flows: Seamless (?) Data Flows:

Impediments and Strategies Impediments and Strategies

TRB AFB80 Summer Committee MeetingEstes Park, CO

July, 2009

Alan [email protected]

OutlineOutline

AMG Specification Development.

3D Technologies Implementation Planning.

Data Flow Obstacles: Design / Contracting / Construction.

OutlineOutline

How AFB80 Can Help.

– Educational Aspects.

– Technological Aspects.

– Institutional Aspects.

– Legal Aspects.

AMG Subgrade Specification AMG Subgrade Specification Development Process (WisDOT/CMSC)Development Process (WisDOT/CMSC)

Advisory Advisory GroupGroup

20062006

20072007 20082008

20092009Literature Literature

Review and Review and Industry Industry SurveySurvey

Specification Specification FrameworkFramework

Stakeholder Stakeholder WorkshopWorkshop

11stst SpecificationSpecification

11stst Pilot Pilot ProjectsProjects

22ndnd SpecificationSpecification

22ndnd Pilot Pilot ProjectsProjects

Final SpecificationFinal Specification

Contractor Contractor and Region and Region InterviewsInterviews

Subgrade Specification ComponentsSubgrade Specification ComponentsNo subgrade stakes required.Engineer can require reversion to conventional

methods.Contractor’s GPS work plan:

– Equipment; staff qualifications; project control; site calibration and checks; equipment calibration; subgrade checks.

3D model:

– Department provides “survey package” of digital data.

– 3D model building is contractor’s responsibility; 2D plans are the contract documents; initial model and revisions provided to department.

Subgrade Specification ComponentsSubgrade Specification ComponentsSite calibration:

– Greater of 6 control points or 2 per mile; daily checks at independent control to be within ±0.10 ft. horizontally and ±0.05 ft. vertically.

Subgrade checks (against plans, not model):– 20 or more per roadway mile, project, or stage;

randomly selected full stations; 4 of any 5 consecutive must be within ±0.10 ft. of plan elevation; engineer observes and uses for approval; engineer can make and / or require additional subgrade checks.

Current and Future Expectations for Current and Future Expectations for AMG SpecsAMG Specs

Specification is optional special provision replacing subgrade staking as bid item on all 2009 projects that include grading.

Will become component of general specifications for 2010 and beyond.

WisDOT will monitor performance of subgrade spec while embarking on development of spec for base course, then paving.

WisDOT deploying 3D design technology – headed towards delivery of 3D models as design product.

Training provided to 80 project engineers (2008, 2009). More training expected over next 2-3 years.

3D Technologies Implementation 3D Technologies Implementation PlanningPlanning

2008: WisDOT implementing AMG and 3D design software and processes.– Preliminary study on wider use of 3D models

throughout design and construction.– Stakeholder workshop on interim report: AMG and

3D design among larger group of 3D technologies and processes interrelated by dependencies, synergistic benefits, and shared impediments.

– Undertook broader effort to develop implementation plan for 3D technologies for design and construction in general.


Plan components:– Vision statement.– Six Initiatives (on-going or proposed) with

backgrounds, issues, stakeholders, recommendations, goals, timelines, levels of effort, priorities, benefits, relationships with other initiatives, and responsible parties.

– Dependencies among initiatives and goals.– Umbrella management strategy.


Vision statement:

“Adoption of 3D methods and seamless data flows throughout initial survey, design, contracting, construction, as-built survey, payment, and other applications included within the infrastructure lifecycle.”

– Opens the door beyond design and construction.

Initiatives, Goals, Timelines, PrioritiesInitiatives, Goals, Timelines, Priorities

Initiatives, Goals, Timelines, PrioritiesInitiatives, Goals, Timelines, Priorities


Dependencies among initiatives: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Automated Machine Guidance

Field Technology

and Inspection

Height Modernization

and Continuously-

Operating Reference Stations

DTM Data Collection

3D

Design

Infrastructure

Lifecycle Uses of 3D

Data

NOTE: An arrow indicates that if goals of the antecedent initiative are not met, then benefits of the subsequent initiative will be diminished.

AMG Base

Course and

Paving Specs

3D

Design 3D

Models for

PS&E 3D

Design 3D Model Standards

HMP and CORS

Implement 5-Year

Completion Plan

DTM Data Collection Implement Standards

& Procedures

DTM Data Collection

Pilot Standards

& Procedures

DTM Data Collection

Develop Standards

& Procedures

Field Technology

and Inspection Implement Inspection Automation

Field Technology

and Inspection Implement Rovers for

Construction

3D Design Existing

Pre-Deployment

Plan

3D Design

Extended Deployment

Plan

HMP and CORS Secure Funding

Field Technology

and Inspection Feasibility Studies

Field Technology

and Inspection

Implementation Plans

Infrastructure Lifecycle

Uses of 3D Data

Notes: 1) Initiative titles appear in bold font. 2) An arrow indicates diminished likelihood of meeting the subsequent goal if the antecedent goal is not met.

DTM Data Collection Fill Survey

Data Coordinator

Positions

DTM Data Collection

Revise Map Check Business Practice

DTM Data Collection Implement DTM-to-DTM for

Earthwork

Dependencies among goals.

Management StrategyManagement Strategy

Recommendations: Appoint a 3D Technologies Management Group,

chaired by a bureau director: Coordinates recommended activities. Provides reporting structure. Keeps upper-level management informed. Advocates for overall effort. Develops outreach mechanisms.

Management Group includes at least one representative from each initiative.

Implementation plan updated at least annually by Management Group.

Seamless Data Flows: Impediments and StrategiesSeamless Data Flows: Impediments and StrategiesNationwide study funded by Center for Freight

Infrastructure Research and Education (CFIRE) at UW-Madison. Project is mid-stream.

Target is this predicament:

Here’s what we do. Here’s what we should do.

Approach:– Literature search.– Nationwide survey.– 3-4 case studies.– Earthwork volumes methods comparison

(average-end-area vs surface-to-surface).– Design software functionality descriptions.– Guidelines and recommendations.

Seamless Data Flows: Seamless Data Flows: Impediments and StrategiesImpediments and Strategies

Being tested by AASHTO Technology Implementation Group on AMG.

Will go to remaining 42 states by mid-August.

Three sections (37 questions): Design, Contracting, Construction.

30-45 minutes to complete.

Web-Based SurveyWeb-Based Survey

Project reports, specification, guidance language, implementation plan, and training materials available right here on my thumb drive and all the time at

– http://cmsc.engr.wisc.edu/reports.html

Availability of MaterialsAvailability of Materials

How This Committee Can HelpHow This Committee Can Help

Four areas:– Educational.

– Technological.

– Institutional.

– Legal.

Educational NeedsEducational Needs

Principles and practice of:– RTK GNSS positioning.– CORS-based RTK positioning.– Automated machine guidance.

Target audience:– Project engineers and contractors.– Recall that many engineering curricula no

longer include courses in even basic surveying.

Web-based delivery for wide access.

Technological NeedsTechnological Needs

Test and demonstration of CORS support for AMG.

QA/QC procedures for AMG and associated model specs.

Guidelines / framework for state-level development of 3D model content and format standards.

Guidelines for engineering-scale DTM data collection.

Institutional NeedsInstitutional Needs

Benefits of AMG to state DOTs and, ultimately, taxpayers.– Are the productivity gains realized by

contractors passed on to DOTs?– Are the benefits to DOTs tangible and

quantifiable? – Why should DOTs develop specifications

for AMG?

Legal NeedsLegal Needs

“The downside is that if the model is expressly subordinate to traditional construction documents, the model cannot be relied upon during the pricing and construction process…”

Thomson and Miner (2006), in reference to building

information modeling (BIM)

Stay Abreast of and SupportStay Abreast of and Support

NCHRP 10-77 (pending): Use of Automated Machine Guidance (AMG) within the Transportation Industry.

“The objective of this research is to develop guidelines for use of AMG…guidelines should (1) include technical procurement specifications for AMG technology; (2) provide guidance on use of such technology in construction projects; and (3) address implementation of AMG technology into construction techniques (including provision of electronic files and models to support the AMG process).”

TRB Website

Documents

3D Technologies (e.g., AMG) and Seamless (?) Data Flows: Impediments and Strategies