The Transportation Research Board (TRB) Committee on Air Quality (ADC20) Summer Meeting will take place July 31-August 1, at the National Academies Keck Center in Washington, DC. Dr. Chris Frey of North Carolina State University will present a keynote talk on his recent landmark assessment of issues facing the transportation air quality field, Trends in On road Transportation Energy and Emissions. Additional talks on key topics, such as freight, exposure assessment, and innovations in data analysis will complement the committee meeting, with an eye toward strategic opportunities and direction for the committee's future research. The meeting flyer with a preliminary agenda and additional information is available at this link<https://www.trbairquality.org/wp-content/uploads/2018/05/ADC20-2018…df>. The summer meeting is open to all TRB Air Quality Committee members and friends, students, and others in the field. Registration is free and all participants were asked to RSVP by June 15, 2018 via this link<https://s.zoomerang.com/r/TRBADC20_2018>18>; however, late registrations will be accepted until mid-July.