How to Calibrate and Validate a Regional DTA Model for Planning Applications (June 22, 2016)


Date: June 22, 2016

Description: This presentation is intended as a review of several practical considerations involved in the successful application of regional DTA models in the context of planning applications. The discussion brings to light several important aspects in various stages of DTA modeling such as initial experimentation, model development, application, calibration and validation, and provides some insights in avoiding pitfalls and thus making DTA model application more successful.

Presenters: Krishna Patnam, PE, LEED AP, has over 12 years of experience in a broad range of analytics within travel modeling. He derives insights from his background in civil engineering, his experience in programming languages, modeling packages and his attention to detail to provide a balance of innovation and functionality towards customized solutions. Mr. Patnam has been involved in the development and application of travel models ranging from micro-simulation operational models to large scale static and dynamic models including toll & revenue analysis, in various regions across the nation. He is an active member of the Institute of Transportation Engineers (ITE) and is currently serving as the Immediate Past President of the Washington DC Section of ITE.

David Roden, PE, manages AECOM's travel demand forecasting and simulation practice. He has 34 years of experience in travel demand forecasting, traffic simulation, transportation planning, and commercial software development. He developed the activity-based demand and dynamic traffic assignment and simulation software called TRANSIMS and has integrated TRANSIMS regional simulations with DaySim and CT-Ramp activity-based models and VISSIM operational simulation tools. Mr. Roden is currently using TRANSIMS to quantify the congestion impacts of 64 regionally significant projects for VDOT; evaluate Active Transportation and Demand Management (ATDM) strategies for FHWA in Pasadena; design dynamic pricing strategies for toll roads in Mexico City; and estimate the impacts of autonomous vehicles on the TransAction 2040 plan for Northern Virginia.