Subcommittee Leaders

In August of 2011, the Bicycle and Pedestrian Data Subcommittee worked together to develop this website for those wanting more information related to national efforts to organize bicycle and pedestrian data.  The subcommittee plans to develop additional content for the website throughout the year utilizing this communication venue for all interested members and friends of the sub-committee.  If you have ideas for additional content or need help in navigating the website, please contact Elizabeth Stolz or Stacey Bricka at the contact information found below.   

Elizabeth Stolz 
Subcommittee Chair
Sprinkle Consulting,
Director of Health and Active Transportation Programs

1624 Market Street 
Suite 202
Denver, Colorado

Ms. Stolz is one of the Nation's leading experts in bicycle and pedestrian count program development and implementation. With an extensivbackground in FHWA's Travel Monitoring Program, she has managed two state DOTs' traffic monitoring programs and recently helped lead Colorado DOT's groundbreaking bicycle and pedestrian count program. 
Ms. Stolz guides and advises many MPO and other regional agencies' growing bike and ped count initiatives; with her background in Exercise Science she is helping health care agencies and institutions pioneer active living programs for both individual and community levels.


Stacey Bricka
Member, Texas A&M Transportation Institute
Phone: 512-467-0952

Stacey Bricka is a Research Scientist with the Texas Transportation Institute at the Texas A&M University.  Her research efforts are focused on the provision of methodological and technical support in travel survey development and in the application of travel survey data in modeling and behavioral studies.  As part of her work, she recently completed an analysis for FHWA, identifying factors that influence the propensity to walk in a small urban region.  Stacey is a member of TRB committees ABJ40 (Travel Survey Methods) and ADB40 (Travel Demand Forecasting), and chair of ABJ45T, a newly formed task force focusing on “New Directions for the NHTS.” 

Thomas Götschi 
Member, University of Zurich

Phone: +41 44 634 50 68
Address: Physical Activity and Health
Institute of Social and Preventive Medicine
University of Zurich  
Seilergraben 498001 Zürich, Switzerland

Thomas works for the Physical Activity and Health Unit at the Institute of Social and Preventive Medicine at university of Zurich.
Greg Lindsey
Member, University of Minnesota
Phone: 612-625-0669
Humphrey School of Public Affairs,130 Humphrey School, 301 19th Ave. S., Minneapolis, MN 55455

Lindsey specializes in environmental planning, policy, and management. His current research involves non-motorized transportation systems, including bicycle and pedestrian infrastructure, and studies of relationships between the built environment and active transportation and physical activity.

Shawn Turner, P.E.
Texas A&M Transportation Institute
Address: 402 D CD/TTI Bldg, MS 3135
College Station, Texas 77843-3135

Shawn Turner is a Senior Research Engineer for the Texas Transportation Institute (TTI).  His most recent research has been related to pedestrian and bicyclist safety and behavioral evaluations, usage monitoring, and planning methods and tools
Shawn is a licensed professional
engineer in Texas, a League Cycling
Instructor with the League of American
Bicyclists, and currently chairs the Pedestrian Committee of the
Transportation Research Board. He bought his first “serious” bike (see photo) using cash from recycling aluminum cans.

Scott Brady

Member, Delaware Valley Regional Planning Commission

Travel Monitoring Manager

Phone: 215-238-2814
Address: 190 N Independence Mall W,    Philadelphia, PA 19106-1520
Scott manages administrative functions of the Office of Travel Monitoring including the preparation of budgets and work program descriptions.  He oversees a traffic counting program which conducts approximately 3,500 annual traffic counts while also researching new and emerging technologies which promise to efficiently gather travel information.  This includes expanding the transportation data provided to stakeholders and the public to include automated pedestrian and bicycle counts.   

Steven Jessberger
Member, Federal Highway Administration


Phone: 202-366-5052

Address: 1200 New Jersey Avenue, SE

Washington, D.C. 20590

Steven Jessberger has been a Transportation Engineer for 11 years and graduated from the Ohio State University with a Bachelor’s of Science Degree.  He currently works for the U.S. Department of Transportation, Federal Highway Administration, Office of Highway Policy Information in Washington D.C.  In this position he is the program manager for the new Travel Monitoring Analysis System (TMAS) software.  This system is used to produce the monthly data for the nationally and internationally distributed Traffic Volume Trends (TVT) report. 


Prior to taking his current position with FHWA, Steven held Engineering and other positions for 15 years at the Ohio Department of Transportation.  Steven also served as a Metrologist in the U.S. Air Force for 4 years and then for Borden Incorporated as a Researcher.   


Steven also has served 8 years on the TRB Traffic Expert Task Group for the Long Term Pavement Performance (LTPP) program.  He is also appointed as the FHWA organizer and Technical Liaison for the Non-Intrusive Technology (phase III) and the Loop/Length Based Vehicle Classification pooled funds.

Nancy Lefler
Member, VHB Engineering

Highway and Safety Data Program Manager


Phone: 919-834-3972

Address: 333 Fayetteville Street, Suite 1450

Raleigh, NC 27601


Nancy X. Lefler is a Highway Safety Specialist with Vanasse Hangen Brustlin, Inc (VHB). She is manages the VHB Highway Safety Data Program. Subject areas of study have focused on low cost safety improvements, pedestrians, roadway and traffic data collection, and state data systems. Her responsibilities have included transportation safety evaluations, data collection, data analysis, crash data analysis, program evaluations, and information dissemination. Ms. Lefler is also the Secretary for both the Transportation Research Board Committees ABJ20, Statewide Transportation Data and Information Systems and ANF10 Pedestrian Committee.

Jeff Frkonja
Resource Systems Group, Inc.

Phone:  312-673-3320
Address: 221 North LaSalle St., Chicago, IL 60606

Jeff is currently a Senior Consultant at Resource Systems Group, Inc. Previously at the Federal Highway Administration, Jeff delivered technical assistance, consultation, and training on travel modeling, land use modeling, and transportation data analysis to FHWA staff, state DOT’s, MPO’s, and related agencies.  His background is in travel demand modeling, transportation data analysis, transportation planning, GIS, and software development.

Prior to joining FHWA, Jeff led the Modeling & Data Applications Group at the Puget Sound Regional Council (PSRC).   At PSRC he co-led the modeling for the update of the regional transportation plan, Transportation 2040, and was responsible for data gathering and performance measure design for the regional Congestion Management Process.  He was able to focus attention on bicycle and pedestrian issues and to ensure that PSRC acquired bicycle count data as a part of overall performance monitoring.

Jeff’s research interests include bicycle/pedestrian travel demand modeling, transportation pricing modeling, and dynamic traffic assignment (DTA).

Jamie Parks, AICP

Member, Complete Streets Program Manager, City of Oakland


Phone: (510) 238-6613

Address: 250 Frank H Ogawa Plaza, Ste 4344 | Oakland, CA 94612 

Jamie Parks is the Complete Streets Program Manager for the City of Oakland focused on implementing the City's complete streets policy. Jamie has extensive experience in applied non-motorized planning, as well as transportation research. His applied pedestrian and bicycle experience includes data collection, use of GIS-based analysis tools, safety evaluations, and performance evaluation studies. Jamie is also actively engaged in transportation research and education activities. He has published research on measuring the pedestrian environment and participated in numerous national transportation research projects. As part of the project team for the 2010 Highway Capacity Manual, Jamie was the lead author of Chapter 23: Off-Street Pedestrian and Bicycle Facilities. Jamie is currently the Research Sub-Committee Chair for the TRB Bicycle Transportation Committee, and is an active member of the Association of Pedestrian and Bicycle Professionals.

Sirisha Kothuri

Communications and Research Coordinator

Portland State University

Phone: 503-725-4285
Twitter: @sirishak
Address: PO Box 751, Portland, Oregon 97207-0751

Sirisha is a PhD student in Civil Engineering, focusing on transportation, at Portland State University in Portland, Oregon. Her research interests are in the areas of bicycle and pedestrian performance measures and methods to incorporate bicycle and pedestrian considerations into signal timing. Sirisha is also an intern at the Bureau of Transportation, City of Portland where her focus is on improving multimodal efficiency at signalized intersections.

Krista Nordback

Research Coordinator

Portland State University

Phone: 503-725-2897
Address: PO Box 751, Portland, Oregon 97207-0751 

Krista is a research associate at the Oregon Transportation Research and Education Consortium (OTREC) at Portland State University, focusing on bicycle and pedestrian traffic and cyclist safety.  She earned her doctorate in civil engineering from the University of Colorado Denver, master’s from University of Minnesota, and bachelor’s in science from Massachusetts Institute of Technology. Her doctoral dissertation, "Estimating Annual Average Daily Bicyclists and Analyzing Cyclist Safety at Urban Intersections," developed a new method for estimating bicycle traffic and provides the first safety performance functions for bicyclists at signalized intersections in the U.S

Greg Griffin, AICP
Membership Coordinator
Texas A&M Transportation Institute

Office:    512-407-1111
Address: 505 E. Huntland Dr., Ste.455
Austin, TX 78752
Twitter:    @gregpgriffin

Greg is an Associate Transportation Researcher with the Texas Transportation Institute, and adjunct faculty of the Department of Geography at Texas State University-San Marcos. His interests include active transportation, urban form, public participation, and geographic methods. He is a life-long bicyclist and member of the American Institute of Certified Planners.

Alex Poznanski
Communications Coordinator
Georgia Regional Transportation Authority (GRTA)
Phone: 404-463-0831
Address: 245 Peachtree Center Ave NE
Suite 400
Atlanta, GA 30303

Alex is a Transit Program Analyst with the Georgia Regional Transportation Authority (GRTA) in Atlanta, and a recent graduate of the Transportation Engineering Master's program at Georgia Tech. His interests include bicycle and pedestrian mobility, public transportation policy and planning, civic engagement in transportation, transportation applications of mobile technology, and transportation data visualization.  He has been involved with the Subcommittee since the 2013 Annual Meeting.