FREEVAL (FREeway EVALuation)

FREEVAL-PA is a freeway analysis tool developed by PennDOT. The computational engine is based on the Highway Capacity Manual and is intended to be utilized prior to the consideration of all maintenance, construction and permit planned projects on any Pennsylvania limited access highway. It can also be used prior to the determination for requiring any more advanced modeling or simulation.

FREEVAL-PA Provides:

  • A more detailed output than current spreadsheet and tools
  • A streamlined analysis process compared to simulation
  • Consistency in analysis across all Districts
  • Analysis support for lane reservation system
  • Numerous applications beyond work zone analysis
  • Rapid iteration of analysis for decision-support

Moderator: Ed Myers, Kittelson & Associates, Inc.      

Introduction to FREEVAL

This session will cover the following topics:

  • Introduction and Overview
  • PennDOT Policy and Use Cases
  • FREEVAL-PA Use Purpose

Shannon Warchol, P.E., senior engineer, Kittelson & Associates, Inc.       

FREEVAL PA- Sketch Planning Method

This session will cover the following topics:

  • Creating a Facility
  • FREEVAL-PA Sketch Planning Method
  • Software Demonstration

Alexandra Jahnle, P.E., senior engineer, Kittelson & Associates, Inc.       

FREEVAL-PA Detail Analysis Method

This session will cover following topics:

  • FREEVAL-PA Detailed Analysis Method
  • Software Demonstration

Bastian Schroeder, P.E., Ph.D., principal engineer, Kittelson & Associates, Inc.     


Shannon Warchol is a senior engineer at Kittelson & Associates, Inc. She has worked with local, state, and federal clients to develop solutions in operations and safety. Warchol has led projects investigating flashing yellow arrows, leading pedestrian intervals, and offset-T signalization schemes. She has served as a trainer for several courses including DDI signal timing a PE prep course, and FREEVAL-PA. Currently, Warchol is working with PennDOT’s HSTO Division to understand and prioritize training needs. She is based in Pittsburgh.

Alexandra Jahnle is a senior engineer at Kittelson & Associates, Inc. with more than eight years of professional, national experience working on a variety of traffic engineering and transportation planning projects. Her technical experience incorporates elements of planning, analysis, safety, and engineering design. She applies her understanding of traffic engineering principals and her knowledge of design elements to develop transportation solutions for the communities in which she works. Jahnle also enjoys working on engineering tool and software development projects. As a member of the FREEVAL-PA project team, Jahnle contributed to the ArcGIS data conflation and processing for customizing the FREEVAL software tool for PennDOT. She also tested the PennDOT-specific FREEVAL interface and assisted with writing the user manual for the tool and developing training materials.

Bastian Schroeder is a principal engineer for Kittelson, who leads the company’s firmwide research practice. He has more than 16 years of progressive experience in applied research and has a passion for developing solutions to complex problems across all areas of transportation. Schroeder specializes in multimodal safety and operations of traffic systems at the intersection, corridor, network, and policy levels for local, state, and federal clients. He has led or co-led over 30 state and federal projects and co-authored over 70 journal papers and conference proceedings. Seven of his papers were recognized with Best Paper Awards, including the 2010 D. Grant Mickle Award by TRB. Schroeder is a member of TRB Committees on Highway Capacity and Quality of Service, the TRB Committee on Roundabouts, and the TRB Simulation Task Force. He is currently leading a pooled fund study to implement CAVs into the Highway Capacity Manual (HCM), and assisting PennDOT in developing and implementing the FREEVAL-PA tool for freeway mobility and work zone analysis statewide.



The Transportation Engineering and Safety Conference (TESC) attracts professionals from throughout Pennsylvania, the mid-Atlantic region, and the country. It is an authoritative source of information on pressing issues from some of the foremost experts in transportation today.

Thomas D. Larson Pennsylvania Transportation Institute

201 Transportation Research Building

The Pennsylvania State University

University Park, PA 16802-4710

Phone: 814-865-1891