The International Alcohol Interlock Symposium organised by the Traffic Injury Research Foundation (TIRF) planned for 27-29 September 2020, in Oslo, Norway, is rescheduled to September 26-28, 2021. Alcohol interlock programs have expanded greatly in recent decades. Since 2000, the Alcohol Interlock Symposium global forum has hosted leading experts to discuss ongoing research and development regarding alcohol and drug impaired driving, interlock programs, and road traffic safety.