The Transportation Research Board (TRB) of the National Academies of Sciences, Engineering, and Medicine recently established a special Task Force on Transportation System Simulation (AHB80T), with Calvin Leggett, North Carolina Department of Transportation as chair. The main task of this task force is to develop a Transportation System Simulation Manual (TSSM). The task force members held their inaugural meeting in Washington, D.C. on September 17, 2015. We are looking forward to a lot of exciting work and progress ahead! Thanks to all who participated!