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⢠New graphic user interfaces; ⢠Adapt to multiple hardware environments; ⢠Multithreading and distributed processing; and ⢠Public, web access to model outputs. NYMTC has also lunched a series of data collections and surveys that will be conducted in the next 3 years. These efforts will include data to update or enhance existing information (regional household travel survey, external survey, regional speed survey, screen line counts, and regional transit on- board surveys), and new data that will improve existing NYBPM deficiencies (regional establishment survey, airport survey, taxi survey, and regional bridge originâdestination survey). Several of the data collections will cover 28 counties in the New YorkâNew JerseyâConnecticut tristate region. This new wave of data collection will provide an up- to- date under- standing of travel patterns and behaviors in the region. They will also be used to recalibrate the NYBPM that will address some of the known issues and bring the NYBPM to the next level. PROJECT SIGNIFICANCE This project is significant for a number of reasons. First, it is the first activity- based model that has been used in air quality conformity analysis and many major invest- ment studies in the United States. The experience of NYBPM proves that the concept of activity- based model does work and works very well in the most complex region in the country. Second, throughout the years of experience in various stages of the development and applications, NYMTC staff has worked with stakehold- ers and gained a better understanding of the modeling system and its improvement needs. The lessons learned will provide other MPOs with valuable insights into future development of activity- based models. 176 INNOVATIONS IN TRAVEL DEMAND MODELING, VOLUME 2