This report describes recent research supported by the US DOT's AERIS program, building upon existing work through developing and improving data collection methods, developing new data fusion techniques to improve estimates, and applying appropriate models for ITS environmental/energy assessments. In addition, the report includes a synthesis of information gathered on other programs in ITS environmental research, as well as a set of technical recommendations on how to proceed with Tracks 1 - 3 of the AERIS program.