California Department of Transportation
Workshop in Sacramento

March 20-21, 2007
Sacramento, CA
Double Tree Hotel

Workshop Purpose
Goals of this Workshop
Meeting Minutes


FHWA decided to sponsor research for mainly Caltrans and Washington State DOT on network simulation models for construction work zone. FHWA sponsored the fund for this workshop to have the presentations from the experts in this topic area. The agenda and arrangement were prepared by the Caltrans, WSDOT, and UC-PRC.

Workshop Purpose:

To share information among agencies and consultants about traffic modeling simulation and the decisions that can be made from these models. Information shared will include decision making based on information from the models, applying model outputs to project level work zones and traffic control, and making policy level decisions about organizational and business practices.

Goals of this Workshop:

  1. This workshop is not a chance to market or lobby for a product(s), applications, or services.
  2. The workshop is to exchange ideas on the subject matter. The outcome will be improve the knowledge on the state of the art and to better inform States and FHWA on a series of tools and options to manage congestion impacts related to construction projects.
  3. To understand how FHWA¡¯s new federal rule making related to work zones and traffic management is related to and compliments this effort. To coordinate operational, planning, and communications issues.
  4. Identify and document best practices around the country, possibly looking at current research efforts and new developments.
  5. Identify and document benefits for considering congestion management applications. Could be hard and soft costs items.
  6. Identify tools and concepts for consideration and possible areas of application - potentially a broader national effort.
  7. Consider the development of guidelines for using these tools and next steps and how to communicate this effort nationally.
  8. Consider how operational and safety requirements need to be coordinated with project and program delivery.
  9. Discuss basic goals of using these tool(s): project/program delivery commitments, and estimating and managing congestion and traffic operational impacts.


Tuesday, March 20, 2007






8:00 to 9:00 am

Introductions, Housekeeping
Overview, Expectations



9:00 to 9:30 am

Background, FHWA's Work Zone Final Rule

Tracy Scriba, FHWA

9:30 to 10:15 am

Traffic Model Simulation & Construction Applications

James Colyar, FHWA

10:15 to 10:30 am


10:30 to 11:15 am

Case Study: Des Moines, IA
I-35 Reconstruction (MITSIM)

Tom Kane, Des Moines MPO & B
Mitiesh Jha, Earth Tech

11:15 to Noon

Case Study: Salt Lake City, UT
I-15 Reconstruction (VISIM)

Doug Anderson, UDOT and
Peter Martin, U of Utah

Noon to 1:30 pm


1:30 to 2:30 pm

Case Study: Ontrario, CA
I-15 Reconstruction (Danamaq)

Syed, Raza, and Johnathon, Caltrans
Hartdog, Caltrans and Mit Jha, Earth Tech

2:30 to 3:10 pm

Case Study: Michigan, Paramics

Do H. Nam, T-Concepts

3:10 to 3:20 pm


3:20 to 4:00 pm

Michigam: Adopting Organizational & Business Practices to Traffic Models

Catharine Jensen, Michigan DOT

4:00 to 4:50 pm

Case Studies: I-80, Saddle Brook, NJ and US 101, San Francisco

Kyle Winslow, Parsons Brinkerhoff
David Thomas, Parsons Brinkerhoff

4:50 to 5:00 pm

Recap of Day's Session

Wednesday, March 21, 2007






8:00 to 8:45 am

Wisconsin DOT Experience with Traffic Models

John Shaw, Wisconsin DOT

8:45 to 9:30 am

Case Study: I-405, Seattle, Washington State DOT

Karl Westby, WSDOT
Mithilesh Jha, Earth Tech

9:30 to 9:45 am


9:45 to 10:45 am

Application of CA4PRS in Traffic Modeling

E.B. Lee, UC Berkeley
David Thomas, PB

10:45 to 11:15 am

Emerging Technologies

Lianyu Chu, UC Irvine

11:15 to 11:45 am

Next Steps: Where Do We Go From Here, Action Items



11:45 to Noon

Wrap-Up and Adjourn

Entire Workshop Notes - click here for downloading the entire workshop notes.

- 1st Day Summary, 2nd Day Summary, General Discussion, Next Steps and attendees list are included in the entire workshop notes.


Federal WZ Rule (FHWA Public Roads)

The Federal Highway Administration (FHWA) recently updated Federal regulations governing safety and mobility in work zones: Rule 23 CFR Part 630 Subpart J. All state and local governments that receive federal-aid highway funding must implement the Rule by October 12, 2007. The Rule requires the implementation of project-level procedures to assess and manage the impacts of highway construction projects. For each project, the regulation calls for development as part of the PS&E of a Traffic Management Plan which considers tools for reducing traffic delay caused by construction. More detail information about the federal WZ rule is published on FHWA Public Roads (Jan 2006) at:

CA4PRS (Construction Analysis for Pavement Rehabilitation Strategy)

CA4PRS software is a scheduling and traffic analysis tool used to select the most economical strategies for highway rehabilitation or reconstruction given various project constraints. The CA4PRS scheduling module calculates the duration of the project in terms of the total number of closures and closure hours required for each rehabilitation alternative. More detail information about CA4PRS at:

I-15 Devore Rehab. Project (FHWA Public Roads)

In 2004, Caltrans applied an innovative, fast-track reconstruction program to a heavily traveled LLPRS project on I-15 in the city of Devore in southern California. A 4.5-km (2.8-mile) stretch of badly damaged concrete lanes was rebuilt in only two single-roadbed continuous closures (also called "extended closures") totaling 210 hours, using counterflow traffic (opposite direction to the main traffic flow) and 24-hour-per-day construction operations. Traditional nighttime-only closures would have required 10 months' work, as estimated on the preconstruction schedule. Instead, the rebuilding took 19 days, with each extended closure for one roadbed lasting 9.5 days. More detail information about I-15 Devore Rehab. Project is published on FHWA Public Roads (Jan 2007) at:

Traffic simulation in general (FHWA Public Roads)

Traffic microsimulation analysis tools can help evaluate these complex solutions by modeling real-world transportation networks on a systemwide scale that is difficult with more traditional methods. Dramatic improvements in computer processing speeds and capabilities in the past decade have enabled traffic microsimulation software to model increasingly complex and larger scale transportation systems. As a result, microsimulation is quickly becoming popular among traffic analysts and is playing an important role in transportation investment decisions. More detail information about traffic simulation is published on FHWA Public Roads (Jan 2007) at: