TRB is pleased to make available the audio and slides of the January 13, 2020, Deen Lecture by Dr. Sarah Jo Peterson the author of The Transportation Research Board, 1920-2020, Everyone Interested Is Invited. Dr. Peterson’s lecture was titled TRB’s Technical Activities Committees: The Significance of Their History. Dr. Peterson’s lecture spotlights key individuals in the Technical Activities Division’s past, critical decisions that made the TAD what it is today, and TRB’s relationship to another Centenni…