Sep 25

Validation of Adjustment Factors for Freeway Work Zone Capacity Calculations (Webinar)

Event Details

September 25, 2020


This free webinar will begin at 12:00 p.m. (Central Time)


Details to access the Webex webinar will be emailed along with a confirmation after you register.

Event Contact
Keith Knapp
InTrans, Iowa LTAP


The objectives of the project described in this webinar were to validate the Highway Capacity Manual (HCM) Sixth Edition work zone capacity methodology for urban and rural freeways in Iowa and to provide recommendations for a more accurate work zone capacity estimate for Iowa and other Smart Work Zone Deployment Initiative states. The researchers collected work zone activity data and the corresponding traffic data from 16 work zone sites across Iowa during the 2018 and 2019 construction seasons. The data included flow rate, speed, and work zone active times and configurations to estimate work zone capacity, discharge flow rate, and free flow speed (FFS).

Speaker Bio

Jing Dong is an associate professor in the Department of Civil, Construction, and Environmental Engineering at Iowa State University (ISU). She also is a transportation engineer for the Center for Transportation Research and Education at ISU’s Institute for Transportation. Before joining ISU, she worked at Oak Ridge National Laboratory as a research staff member from 2010 to 2012. From 2009 to 2010, she was a postdoctoral researcher at the Northwestern University Transportation Center. Dr. Dong has 15 years of professional experience in transportation planning, traffic operations, and network modeling. Her research is focused on improving the mobility, safety, and environmental sustainability of multi-modal transportation systems. Dr. Dong is a member of the Transportation Research Board (TRB) Committee on Traffic Flow Theory and Characteristics (ACP50) and Transportation Network Modeling (AEP40). She is also a senior member of IEEE.